PhytOC sequestration characteristics and phytolith carbon sink potential of karst Masson pine forest in southern China.

Masson pine forest is an extremely important component of terrestrial ecosystems and plays a significant ecological function in forest carbon sink in China. Phytolith-occluded organic carbon (PhytOC) is the important long-term stable carbon sink mechanism in terrestrial ecosystems. To provide scientific bases for the accurate estimation of phytolith carbon sink and precise management of Masson pine forests, PhytOC sequestration and accumulation of the three typical forest ages of Masson pine in southern China karst area were studied in the present study. Although the sampling pots were still limited, PhytOC sequestration characteristics of the Masson pine forests were successfully clarified. The followed results and conclusions were obtained: 1) The range of PhytOC content, reserves, and sequestration rate of the Masson pine forests was 0.04-0.78 g·kg-1, 0.44-16.93 kg·hm-2, and 0.094-2.557 kg CO2 hm-2·a-1, respectively. 2) Among the three forest ages of Masson pine, the mature forest had the highest accumulation of PhytOC, and the middle-aged forest had the highest sequestration rate of PhytOC. Compared with biomass, vegetation productivity more positively significantly affected the PhytOC sequestration. 3) Among the three organs, leaves had the highest PhytOC content and trunks had the highest PhytOC reserves, which all took significant functions in the sequestration and accumulation of PhytOC. 4) Artificial measures to promote vegetation productivity, such as thinning, artificial tending, and low-efficiency forest transformation, will significantly increase the PhytOC sequestration and accumulation of Masson pine forests.

Ecological stoichiometry of C, N, P and Si of Karst Masson pine forests: Insights for the forest management in southern China.

Ecological stoichiometry is an effective method to study the stoichiometric relations and laws of elements in biogeochemical cycle, widely used in studies on nutrient cycles, limiting elements and nutrient utilization efficiency in ecosystems. To explore C, N, P, and Si stoichiometric characteristics and reveal these nutrient cycle processes and mechanisms in the karst Masson pine forests, the typical Masson pine forests of the three different stand ages in southern China were selected as the research objects and the C, N, P, and Si stoichiometric characteristics of soil-plant-litter continuum were studied. The followed results and conclusions were obtained: 1) Content range of TOC (total organic carbon), TN (total N), TP (Total P) and TSi (total Si) of the Masson pine forests was 288.31-334.61, 0.34-6.66, 0.11-1.05, and 0.76-11.4 g·kg-1, respectively. And the ratio range of C:N, C:P, C:Si, N:P, N:Si, and P:Si was 49.95-913.57, 99.98-2872.18, 22.48-429.31, 1.85-6.33, 0.17-6.01, and 0.04-0.91, respectively. 2) The significant differences in C, N, P, and Si stoichiometric characteristics were present between different organs or different forest ages. Leaves had the highest N and P content, while roots were the best enriched organ of Si element. Si content and C:Si were obviously correlated with forest age. 3) Significant N limitation was present in the Masson pine forests. And in the young and middle-aged forests, N limitation was more obvious. 4) The litter nutrients mainly came from branches. And the litter decomposed fast, which played an important role in the nutrient return of barren karst soil. The present results not only revealed the stoichiometric characteristics and cycling processes of C, N, P, and Si elements in the Masson pine forests, but also provided important scientific bases for the artificial management of Masson pine plantations in southern China.

The Occurrence and Factors Associated with Overt Urinary Retention Among Postpartum Women After Vaginal Delivery with Labor Epidural Analgesia.

Background: Early recognition and prompt intervention for overt postpartum urinary retention (PUR) takes on a critical significance when a woman chooses labor epidural analgesia for pain relief. However, there have been rare fewer reports on the incidence and factors influencing overt PUR in women after vaginal delivery with labor epidural analgesia in China. Therefore, this study aimed to investigate the incidence and factors correlated with overt urinary retention in postpartum women undergoing vaginal delivery with labor epidural analgesia. Methods: In total, 462 Chinese postpartum women with labor epidural analgesia and vaginal delivery were recruited in one tertiary hospital in Beijing from Dec. 2020 to Nov. 2021. Factors associated with overt PUR for these women were identified through multivariate logistic regression analysis. Results: The incidence of overt PUR was obtained as 10.2% among these women after vaginal delivery with labor epidural analgesia. As indicated by the result of univariate analysis, forceps-assisted delivery, lateral episiotomy, perineal pain, and fluid administration in the delivery room were correlated with PUR. The result of the multivariate logistic regression suggested that forceps-assisted delivery (odds ratio [OR]=2.46, 95% confidence interval [CI]: 1.14-5.32, P=0.022), lateral episiotomy (OR=4.55, 95% CI: 1.91-10.80, P=0.001), and perineal pain (OR=4.23, 95% CI: 2.05-8.73, P<0.001) were factors affecting overt PUR for these women. Conclusion: Postpartum women undergoing vaginal delivery with labor epidural analgesia showed a high incidence of overt PUR, and health-care providers should pay more attention to their postpartum urination status in clinical practice. Effective and timely intervention is strongly recommended to reduce the occurrence of overt PUR for these kinds of postpartum women undergoing vaginal delivery with labor epidural analgesia, such as ones experienced forceps-assisted delivery, lateral episiotomy, and more severe perineal pain.

Association of body fat percentage with kidney stone Disease: a cross-sectional and longitudinal study among bus drivers.

BACKGROUND: The association between body fat percentage (BFP) and kidney stone disease (KSD) among bus drivers has not been explored in the existing literature. Thus, this study was conducted to explore the influence of BFP on the risk of KSD as well as KSD development for bus drivers to fill the research gap. METHODS: A cross-sectional and longitudinal cohort study was designed. In total, 3433 bus drivers were included in the cross-sectional analyses, and 1864 bus drivers without KSD at baseline and with regular follow-up were included in the longitudinal cohort study. RESULTS: During a median follow-up of 2.9 years, KSD occurred in 15.0% of bus drivers. Multivariate logistic analysis found that each 5% higher BFP was not only significantly related with higher odds of KSD (odds ratio [OR] = 1.48), but also associated with higher odds of developing KSD (OR = 1.27). The risk of prevalent KSD in obesity group based on BFP was 2.47 times of the normal group; and the corresponding risk of developing KSD was 1.61 times. For obesity bus drives with age < 40, the corresponding risk increased to 4.54 times. CONCLUSION: Bus drivers were reported to have a high prevalence of KSD as well as development of KSD. As a significant predictive factor for KSD, BFP can be used to monitor and prevent bus drivers from kidney stone formation. Bus drivers in obesity group based on BFP, especially with age < 40 years should become priority subjects for targeted prevention.

A 5-Year Follow-Up Study to Explore Factors Associated with Rapid Kidney Function Decline Among Bus Drivers.

Background: Owing to the stressful occupational characteristics, bus drivers have been reported to have a higher risk of renal dysfunction. However, the related factors associated with rapid kidney function decline among bus drivers have not been explored in the existing literature. Therefore, our research aimed to investigate factors related with rapid kidney function decline, and to explore the correlation of baseline SUA (serum uric acid), longitudinal changes in SUA, and rapid eGFR (estimated glomerular filtration rate) decline for bus drivers. Methods: This was a five-year cohort study in Shenzhen, China, between 2017 and 2021. We included 832 bus drivers with normal kidney function at baseline. Study subjects were stratified into four quartiles of change in eGFR, and rapid eGFR decline was regarded as the highest (4th) quartile of ΔeGFR (eGFR in 2017-eGFR in 2021). Univariable and multivariable logistic regressions were conducted to explore factors affecting rapid eGFR decline. Results: The incidence of hyperuricemia among bus drivers was 37.7% in 2017 and 40.5% in 2021. The overall subjects had a median 5-year decrease in eGFR of 6.72 mL/min/1.73 m2, and individuals with increased SUA from normal to hyperuricemia group had the greatest decline of eGFR. Multivariate analysis showed bus drivers' age (Odds radio: OR, 1.04), elevated baseline eGFR (OR, 1.08), and SUA increase (OR, 1.38) were significantly associated with rapid eGFR changes. Conclusion: The high prevalence of hyperuricemia among bus drivers should warrant more attention from health professionals. Subjects' age, elevated baseline eGFR, and SUA increase were risk factors for rapid eGFR decline over 5-year. The findings can provide significant evidence for timely prevention and intervention to decrease the incidence of rapid renal function decline among bus drivers.

Association of Triglyceride-Glucose Index with the Risk of Hyperhomocysteinemia Among Chinese Male Bus Drivers: A Longitudinal Study.

Background: Insulin resistance (IR) and hyperhomocysteinemia (HHcy) are significant risk factors for cardiovascular disease (CVD). As an important marker for IR, Triglyceride-Glucose (TyG) index maybe a significant predictor for HHcy progression, reflecting cardiovascular risk. However, the relationship between TyG index and HHcy has been unknown, especially for the high-risk occupation group of male bus drivers. This longitudinal study was initially conducted to explore the outcome of TyG index in predicting HHcy among male bus drivers. Methods: In total, 1018 Chinese male bus drivers with Hcy data and regular follow-up from 2017 to 2021 were screened, and 523 non-HHcy subjects at baseline were included in the longitudinal cohort. A restricted cubic spline (RCS) was performed to investigate the possible non-linear relationship between TyG index and the progression of HHcy. A multivariate logistic regression model was used to explore the association between TyG index and developing HHcy via assessing the value of odds ratio (OR) and 95% confidence interval (CI). Results: After the median follow up time of 2.12 years, approximately 27.7% of male bus drivers (mean age: 48.1 years) was identified as new incidents HHcy. Multivariate logistic regression found that the higher level of TyG was associated with an increased risk of new onset HHcy (OR = 1.47; 95% CI: 1.11-1.94); and the association seemed to be strong among male bus drivers with elevated low-density lipoprotein cholesterol (LDL-C) (P for interaction < 0.05). Conclusion: As a higher risk occupation group for HHcy, male bus drivers should cause much more attentions from policy makers, employers, and health professionals in China. Identifying male bus drivers with HHcy is of significance at an earlier stage in the primary care setting. Being a significant predictive factor for HHcy, TyG index could be used to monitor and prevent Chinese male bus drivers from HHcy, especially for individuals with elevated LDL-C.

Effect of online interventions on reducing anxiety and depression for women with breast cancer: a systematic review and network meta-analysis protocol.

INTRODUCTION: Breast cancer has becoming the most common malignancy in women globally. Various online interventions have been conducted to help women with breast cancer to manage their psychological symptoms. However, there has been not yet a network meta-analysis that has synthesised scientific evidence about online intervention on reducing anxiety and depression for women with breast cancer. To fill the literature gap, this protocol aims to generate a systematic review and network meta-analysis to assess the effectiveness of online interventions on reducing anxiety and depression for these women with breast cancer. The study results may inform the recommendations for clinical guidelines and facilitate the decision-making process to improve psychological health of women with breast cancer. METHODS AND ANALYSIS: The protocol is in compliance with the guideline of Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocols and for Systematic Reviews and Network Meta-Analysis. The electronic databases of Pubmed, EMBASE, CINAHL, PsycINFO, Web of Science, Cochrane Central Registry of Controlled Trials and OpenGrey will be used for searching of related randomised controlled trials from their inception. No restrictions on publication date and language will be applied. The primary outcomes are the symptoms of anxiety and depression, and the secondary outcome is the satisfaction with the received healthcare. Two reviewers independently evaluate the risk of bias using the Cochrane Collaboration's Risk of Bias tool. The assessment of heterogeneity, inconsistency, subgroup analysis, sensitivity analysis and publication bias will be conducted. The netmeta package of R software will be used to perform the network meta-analysis. ETHICS AND DISSEMINATION: This study will be based on previous research findings, so that ethics approval is not required. Data searching commences in July 2023 and expects to complete in January, 2024. The findings will be disseminated through peer-reviewed journals and academic conferences. PROSPERO REGISTRATION NUMBER: CRD42022318530.

The effectiveness of an internet-based support program on maternal self-efficacy, postpartum depression and social support for primiparous women during the COVID-19 pandemic: Randomized controlled trial.

Background: Many primiparous women usually encounter various parenting and mental health issues after childbirth. The effects of intervention based on internet platform on parenting and mental health outcomes for Chinese first-time mothers remain unknown during the COVID-19 pandemic. Therefore, our research aimed to evaluate the effectiveness of an internet-based support program (ISP) on maternal self-efficacy (MSE), postpartum depression (PPD) and social support for primiparous women amid the pandemic. Methods: A multicenter randomized controlled trial (RCT) was conducted. From May 2020 to March 2021, 242 primiparous women were recruited in the maternity wards of two hospitals in Shenzhen City, China and randomly assigned to the intervention group and the control group. Women in control group (n = 118) received the routine postpartum care, and women in intervention group (n = 118) accessed to the ISP intervention (expert education and peer support) and routine postpartum care. Intervention outcomes were measured at baseline before randomization (T0), post-intervention (T1), and three-month follow up (T2) through questionnaires. The chi-square (χ2), the independent sample t-test and the repeated measures multivariate analysis of covariance were performed, and the two-tailed p-value <0.05 was regarded as statistically significant. Results: In comparison with women in the control group, women in the intervention group had a significantly higher score of MSE at T1 (mean: 73.53, standard deviation [SD]: 6.21) and at T2 (mean: 72.90, SD: 6.73); and a lower score of PPD at T1(mean: 6.03, SD: 2.50) and T2 (mean: 5.70, SD: 2.23); and a higher score of social support at T1 (mean: 45.70, SD: 3.73), but no significant difference at T2 (mean: 42.90, SD: 3.29). Conclusions: The effect of ISP was evaluated to significantly increase the levels of MSE, social support, and to alleviate PPD symptoms for Chinese first-time mothers. As an effective and easily accessible intervention, ISP could become a significant source for health professionals to support primiparous women on parenting and mental health during the COVID-19 pandemic. Trial registration: The trial is registered at the Chinese Clinical Trials Registry (ChiCTR2000033154).

Predictors of surgery choices in women with early-stage breast cancer in China: a retrospective study.

BACKGROUND: The breast-conserving surgery and reconstruction rate in China is relatively low when compared with those in Western countries. Moreover, predictors of surgical choices for women with breast cancer in China have not yet been explored. This study aims to explore differences in the surgical choices of women with different demographic and clinical characteristics and the predictors that influence surgical choices of women with early-stage breast cancer. METHODS: This retrospective study included women with early-stage (0-II) breast cancer who underwent surgeries at one of two Xiamen University-affiliated hospitals between 2009 and 2017. Using medical records, eleven variables were collected: the woman's age, year of diagnosis, hospital, marital status, payment method, cancer stage, presence of positive axillary lymph node, histology, neoadjuvant chemotherapy, radiotherapy, and the type(s) of surgery they chose. Binary logistic regression was used to analyse predictors of surgical choice. RESULTS: A total of 1,787 cases were included in this study. Of the total number of women with breast cancer, 61.3% underwent mastectomy without breast reconstruction, 26.4% underwent mastectomy with breast reconstruction, and the remaining 12.2% chose breast-conserving surgery. Women with different demographic and clinical characteristics underwent different types of surgery. Cancer stage, neoadjuvant chemotherapy, radiotherapy, and the choice of hospital were found to be predictors of breast-conserving surgery. Meanwhile, age, year of diagnosis, payment method, neoadjuvant chemotherapy, and the choice of hospital were found to be predictors of reconstruction after mastectomy in women with early-stage breast cancer. CONCLUSIONS: In China, surgical choices for women with breast cancer have diversified. Healthcare workers should understand the surgical preferences of women of different ages. For early detection of breast cancer, knowledge of breast self-examination and breast cancer screening should be provided. Adequate information about the safety of reconstruction and advocacy for medical insurance coverage of reconstruction should be offer. Breast surgeons need specialised training and standardising protocols towards different types of breast surgery. These actions will help women make better, well-informed decisions about their breast surgeries.

Group-Based Trajectory Analysis for Postpartum Depression Symptoms among Chinese Primiparous Women.

BACKGROUND: Subgroups of individuals sharing similar patterns of postpartum depression (PPD) among Chinese women are unknown thus far. Using a group-based trajectory model, this study aimed to explore the subgroups of Chinese primiparous women that share similar patterns of PPD and to explore the predictors of PPD trajectory membership over the course of the first six months postpartum. METHODS: In total, 674 first-time Chinese mothers were recruited, and their depression status was assessed using the Edinburgh Postnatal Depression Scale (EPDS) at four time points. FINDINGS: Around 18.0% of participants belonging to Group 1 labeled as "few or no symptoms" remained stable, with an EPDS score of less than 5 during a six-month postpartum period. Almost one-third of subjects fell within the second trajectory, labeled "subclinical but present symptoms", and peaked into the range of mild PPD but mostly stayed in the minimal range and had few or no PPD symptoms. Group 3 included 31.2% of women labeled "minor PPD status", and their mean EPDS scores increased to a peak of 14.66 at six weeks postpartum. Group 4, with "major PPD status", comprised 19.2% of the population, and the mean EPDS scores dramatically increased, reaching a peak of 19.59 at 12 weeks postpartum. Fewer types of support and not attending parenting training were associated with membership in the minor and major PPD status trajectories. CONCLUSIONS: Almost half of the Chinese new mothers in the study were found to fall into the two groups with minor or major PPD status trajectories, who should be given more attention and awareness from health professionals and researchers. Understanding predictors of group membership could help health providers to identify folks to prioritize getting connected to care as well as forming targeted interventions. Less degree of received support and not attending parenting training were identified to predict PPD trajectory membership. The regular, routine screening of PPD should be conducted at least 12 weeks postpartum, especially for new mothers in the major PPD status trajectory.

A follow-up study to explore factors associated with rapid kidney function decline and new-onset kidney disease among Chinese elderly population.

AIM: To explore potential factors associated with rapid kidney function decline and new-onset kidney disease among a Chinese elderly population, and to examine the relationships between baseline serum uric acid (SUA), longitudinal change in SUA and rapid estimated glomerular filtration rate (eGFR) decline over 5 years for this Chinese elderly population. METHODS: A 5-year follow-up study was conducted from 2016 to 2020 in Xiamen City, China; and 2436 elderly people with normal kidney function at baseline was included. The multivariable logistic regressions were used to explore risk factors for rapid eGFR decline and new-onset kidney disease. RESULTS: The median age of subjects was 65 years, and 38.5% were men. These elderly people experienced a median 5-year decrease in eGFR of 14.50 mL/min/1.73 m2 , and 11.2% of them had developed new-onset kidney disease after 5-year follow-up. Participants with elevated SUA change from the normal group to the hyperuricemia group witnessed the highest decrease of eGFR after a 5-year follow-up than other groups. Multivariate analysis found advanced age, female, elevated baseline SUA, elevated SUA change, hypertension and triglyceride-glucose index were risk factors for rapid eGFR decline and new-onset kidney disease. CONCLUSION: The Chinese elderly population was more likely to encounter rapid renal function decline and new-onset kidney disease. A regular test for kidney disease was strongly recommended for these elderly people who were female, with advanced age, with elevated baseline SUA and elevated SUA change; and had high levels of insulin resistance, and blood pressure. The derived findings can offer significant evidence for targeted prevention for the Chinese elderly population. Geriatr Gerontol Int 2022; 22: 968-975.

Blood pressure states transitions among bus drivers: the application of multi-state Markov model.

PURPOSE: To explore the transition patterns among different levels of blood pressure for bus drivers. METHODS: A follow-up study was conducted to investigate the transition probabilities of three blood pressure states, the sojourn time in each state, the survival probabilities, and the risk factors affecting hypertension progression. Based on 5618 blood pressure measurements of 1883 Chinese bus drivers from 2017 to 2021, a multi-state Markov model was established. RESULTS: The mean age of participants was 41.43 ± 6.71 years, and 82.37% were male. The probabilities from normal state to hypertension within 1-year follow-up were 4.60% (male) and 2.13% (female); however, the corresponding changes over a 3-year follow-up had a significant increase to 20.27% (male) and 7.98% (female). The sojourn time of normal state and elevated state was 1.82 ± 0.09 years and 1.98 ± 0.08 years, respectively. The male participants, the increasing age, BMI, CHOL and TG were risk factors for progression from normal state to elevated state, and/or from elevated state to hypertensive state (HR: 1.04-2.53). CONCLUSIONS: Early preventive measures on the progression of hypertension should be taken for Chinese bus drivers, and at least one physical examination per year is strongly recommended. The government and bus companies should pay more attention to these kinds of bus drivers with high probabilities of hypertension: male, older than 40 years, with the higher values of BMI and blood lipid. The derived findings of sojourn time, transition probabilities and survival probabilities can provide reference for health professionals to make targeted intervention to reduce bus drivers' hypertension occurrence.

Online and Offline Intervention for the Prevention of Postpartum Depression among Rural-to-Urban Floating Women: Study Protocol for a Randomized Control Trial.

BACKGROUND: As a higher-risk group of postpartum depression (PPD), rural to urban floating women urgently require effective and accessible mental health care after childbirth to prevent PPD. Even though there were various interventions, only a small number of women have sought professional help to reduce their depressive symptoms after childbirth, suggesting the need for an innovative intervention delivery to overcome women's help-seeking barriers. Online and offline (OTO) interventions, which combine face-to-face and internet-based interventions, provide apparent benefits. As a result, the protocol for a randomized controlled study (RCT) was designed to examine the effectiveness and acceptability of OTO intervention on psychosocial outcomes for Chinese rural-to-urban floating women including the reduction of PPD symptoms and PPD stigma, and the improvement of social support and quality of life. METHODS: A double blind, multicenter, RCT will be used and a total of 226 participants will be recruited. The OTO intervention called the "Hi, Mom" program will integrate two face-to-face consulting sessions with online sessions comprising an information module, a communication module, an ask-the-expert module, and a peer story module over a period of three months. The control group will receive routine postpartum care. Outcome measures including PPD symptoms, PPD stigma, social support, quality of life, mother-child bonding, and satisfaction with health care received will be conducted at baseline, postintervention, and three-month follow-up. RESULTS AND DISCUSSION: If the intervention is effective, it will provide a convenient and effective intervention program on postpartum mental well-being for rural-to-urban floating women. As the first study to test the effects of an OTO intervention for the prevention of PPD in China, the outcomes gained from this study will provide evidence-based knowledge for clinical practice on PPD prevention based on online and offline health technologies. Moreover, it could be used to plan a culturally appropriate OTO intervention for migrant mothers from different countries.

Multistate Markov model application for blood pressure transition among the Chinese elderly population: a quantitative longitudinal study.

OBJECTIVE: To explore the transitions of different blood pressure states based on a multistate Markov model among the Chinese elderly population. SETTING: A community health centre in Xiamen, China. PARTICIPANTS: 1833 elderly Chinese people. METHODS: A multistate Markov model was built based on 5001 blood pressure measurements from 2015 to 2020. Research was conducted to explore the process of hypertension progression, providing information on the transition probability, HR and the mean sojourn time in three blood pressure states, namely normal state, elevated state and hypertensive state. RESULTS: Probabilities of moving from the normal state to the hypertensive state in the first year were 16.97% (female) and 21.73% (male); they increased dramatically to 47.31% (female) and 51.70% (male) within a 3-year follow-up period. The sojourn time in the normal state was 1.5±0.08 years. Elderly women in the normal state had a 16.97%, 33.30% and 47.31% chance of progressing to hypertension within 1, 2 and 3 years, respectively. The corresponding probabilities for elderly men were 21.73%, 38.56% and 51.70%, respectively. For elderly women starting in the elevated state, the probabilities of developing hypertension were 25.07%, 43.03% and 56.32% in the next 1, 2 and 3 years, respectively; while the corresponding changes for elderly men were 20.96%, 37.65% and 50.86%. Increasing age, body mass index (BMI) and glucose were associated with the probability of developing hypertension from the normal state or elevated state. CONCLUSIONS: Preventive actions against progression to hypertension should be conducted at an early stage. More awareness should be paid to elderly women with elevated state and elderly men with normal state. Increasing age, BMI and glucose were critical risk factors for developing hypertension. The derived transition probabilities and sojourn time can serve as a significant reference for making targeted interventions for hypertension progression among the Chinese elderly population.

Development of a Prognostic App (iCanPredict) to Predict Survival for Chinese Women With Breast Cancer: Retrospective Study.

BACKGROUND: Accurate prediction of survival is crucial for both physicians and women with breast cancer to enable clinical decision making on appropriate treatments. The currently available survival prediction tools were developed based on demographic and clinical data obtained from specific populations and may underestimate or overestimate the survival of women with breast cancer in China. OBJECTIVE: This study aims to develop and validate a prognostic app to predict the overall survival of women with breast cancer in China. METHODS: Nine-year (January 2009-December 2017) clinical data of women with breast cancer who received surgery and adjuvant therapy from 2 hospitals in Xiamen were collected and matched against the death data from the Xiamen Center of Disease Control and Prevention. All samples were randomly divided (7:3 ratio) into a training set for model construction and a test set for model external validation. Multivariable Cox regression analysis was used to construct a survival prediction model. The model performance was evaluated by receiver operating characteristic (ROC) curve and Brier score. Finally, by running the survival prediction model in the app background thread, the prognostic app, called iCanPredict, was developed for women with breast cancer in China. RESULTS: A total of 1592 samples were included for data analysis. The training set comprised 1114 individuals and the test set comprised 478 individuals. Age at diagnosis, clinical stage, molecular classification, operative type, axillary lymph node dissection, chemotherapy, and endocrine therapy were incorporated into the model, where age at diagnosis (hazard ratio [HR] 1.031, 95% CI 1.011-1.051; P=.002), clinical stage (HR 3.044, 95% CI 2.347-3.928; P<.001), and endocrine therapy (HR 0.592, 95% CI 0.384-0.914; P=.02) significantly influenced the survival of women with breast cancer. The operative type (P=.81) and the other 4 variables (molecular classification [P=.91], breast reconstruction [P=.36], axillary lymph node dissection [P=.32], and chemotherapy [P=.84]) were not significant. The ROC curve of the training set showed that the model exhibited good discrimination for predicting 1- (area under the curve [AUC] 0.802, 95% CI 0.713-0.892), 5- (AUC 0.813, 95% CI 0.760-0.865), and 10-year (AUC 0.740, 95% CI 0.672-0.808) overall survival. The Brier scores at 1, 5, and 10 years after diagnosis were 0.005, 0.055, and 0.103 in the training set, respectively, and were less than 0.25, indicating good predictive ability. The test set externally validated model discrimination and calibration. In the iCanPredict app, when physicians or women input women's clinical information and their choice of surgery and adjuvant therapy, the corresponding 10-year survival prediction will be presented. CONCLUSIONS: This survival prediction model provided good model discrimination and calibration. iCanPredict is the first tool of its kind in China to provide survival predictions to women with breast cancer. iCanPredict will increase women's awareness of the similar survival rate of different surgeries and the importance of adherence to endocrine therapy, ultimately helping women to make informed decisions regarding treatment for breast cancer.

The cross-sectional survey on COVID-19 vaccine hesitancy and it predictors among Chinese parents of 3-17 years aged children in Shenzhen City.

INTRODUCTION AND OBJECTIVE: Vaccinations programs on 3-17 years aged children in China have been launched in some cities since July 2021; and comparative evaluations are important to push the programs forward. Therefore, this study is conducted to explore the COVID-19 vaccine hesitancy and it predictors among Chinese parents of 3-17 years aged children; and their willingness to vaccinate their child/children. MATERIAL AND METHODS: A cross-sectional study was conducted based on the online survey; and 3484 participants were recruited in health centers of Shenzhen, China. RESULTS: The prevalence of COVID-19 vaccine hesitancy was 20.7% among Chinese parents of 3-17 years aged children; and 2976 participants (89.0%) were reported to be willing or very willing to accept a COVID-19 vaccine for their child/children. Perceived trust degree of a COVID-19 vaccine (OR: 0.766), and perceived effectiveness of a COVID-19 vaccine (OR: 0.455) were negatively associated with vaccine hesitancy. Perceived risk degree of a COVID-19 vaccine (OR: 1.485) positively predicted vaccine hesitancy. Parents with a higher educational level (OR: 0.518) and working in public institution (OR: 0.741) had a lower level of vaccine hesitancy; whereas, parents with liberal professionals had a higher level of vaccine hesitancy (OR: 1.378). CONCLUSIONS: These findings indicated that Chinese parents of 3-17 years aged children in Shenzhen City had a higher level of COVID-19 vaccine acceptability, compared with adults in Western counties. The significant factors of perceived trust degree, effectiveness, and risk degree of a COVID-19 vaccine, parents' educational level and occupation could predict COVID-19 vaccine hesitancy. The research results can be useful in supporting the development of effective and targeted children COVID-19 vaccination campaigns in China and worldwide.

Prevalence and Risk Factors Associated with Postpartum Depression during the COVID-19 Pandemic: A Literature Review and Meta-Analysis.

BACKGROUND: Owing to the high prevalence and detrimental consequences, postpartum depression (PPD) has been identified as one of the severe global public health issues in the last decade. Prior research found that during disasters or events, the prevalence rates of mental disorders among postpartum women are significantly high. However, the effect of the coronavirus disease 2019 (COVID-19) pandemic on PPD and its risk factors remained unclear for postpartum women. Therefore, the present systematic review and meta-analysis aimed to estimate the influence of the COVID-19 pandemic on the prevalence of PPD and to summarize risk factors for PPD during the COVID-19 pandemic. METHODS: Three electronic databases of MEDLINE, EMBASE, and Cochrane library databases were systematically searched for articles from their commencements until 1 November 2021. Quality assessment of included studies, random-effects meta-analysis, and sensitivity analysis were performed. RESULTS: A total of eight studies with 6480 postpartum women during the COVID-19 pandemic were included, and most studies were conducted in developed countries. The pooled prevalence of PPD was 34% (95% CI: 21-46%) during the COVID-19 pandemic, much higher than the incident of previous research during the non-pandemic period. Risk factors for PPD during the COVID-19 pandemic were defined as socio-demographic and clinical characteristics, stress and anxiety, lack of various supports, and the COVID-19 related factors. CONCLUSION: The research findings indicated that the COVID-19 pandemic could make detrimental effects on maternal mental wellbeing among women after childbirth. Investigating the prevalence and risk factors of PPD among postpartum women could shed some light on their mental and emotional states; so that support measures and tailored interventions from health professionals and policymakers could be offered to improve the maternal and infant outcomes, especially during the COVID-19 pandemic. Much more research on maternal psychological wellbeing during the COVID-19 pandemic was strongly recommended to undertake in the middle and low-income countries.

What Should Be Responsible for Eryptosis in Chronic Kidney Disease?

BACKGROUND: Renal anemia is an important complication of chronic kidney disease (CKD). In addition to insufficient secretion of erythropoietin (EPO) and erythropoiesis disorders, the impact of eryptosis on renal anemia demands attention. However, a systemic analysis concerning the pathophysiology of eryptosis has not been expounded. SUMMARY: The complicated conditions in CKD patients, including oxidative stress, osmotic stress, metabolic stress, accumulation of uremic toxins, and iron deficiency, affect the normal skeleton structure of red blood cells (RBCs) and disturbs ionic homeostasis, causing phosphatidylserine to translocate to the outer lobules of the RBC membrane that leads to early elimination and/or shortening of the RBC lifespan. Inadequate synthesis of RBCs cannot compensate for their accelerated destruction, thus exacerbating renal anemia. Meanwhile, EPO treatment alone will not reverse renal anemia. A variety of eryptosis inhibitors have so far been found, but evidence of their effectiveness in the treatment of CKD remains to be established. KEY MESSAGES: In this review, the pathophysiological processes and factors influencing eryptosis in CKD were elucidated. The aim of this review was to underline the importance of eryptosis in renal anemia and determine some promising research directions or possible therapeutic targets to correct anemia in CKD.

Surveillance of Parenting Outcomes, Mental Health and Social Support for Primiparous Women among the Rural-to-Urban Floating Population.

China has the largest population of floating rural-to-urban women worldwide, most of whom are of childbearing age. However, few studies have been conducted to monitor the changing trends in parenting outcomes, mental health and social support for these women in the early postpartum period. In this quantitative longitudinal study, 680 primiparous women among the floating population were recruited in Shenzhen, China. Face-to-face collection of socio-demographic questionnaires was completed by researchers in maternity wards on the third postnatal day. Follow-up electronic questionnaires were dispatched to women via email or WeChat at 6 weeks and 12 weeks following childbirth, including the Self-efficacy in Infant Care Scale (SICS), Edinburgh Postnatal Depression Scale (EPDS) and Postnatal Social Support Scale (PSSS), to measure maternal self-efficacy (MSE), postpartum depression (PPD) and social support, respectively. The mean scores of MSE for these floating women were 67.16 (14.35) at 6 weeks postpartum and slightly increased to 68.71 (15.00) at 12 weeks postpartum. The mean scores of EPDS remained almost stable, from 11.19 (4.89) to 11.18 (5.34) at the two time points. The prevalence of mild and severe PPD among floating women at 6 and 12 weeks after childbirth decreased from 54.4% to 40.1% and from 50.6% to 35.4%, respectively. The mean score of social support was 37.04 (10.15) at 6 weeks postpartum and slightly improved to 38.68 (10.46) at 12 weeks postpartum. Primiparous women among the rural-to-urban migrant population had an obviously negative status of parenting outcomes and mental health; and there was a lack of social support after childbirth. In future, tailored evidence-based interventions are highly needed to promote floating women's parenting outcomes, mental wellbeing and social support in the early stages of motherhood. As a higher-risk group of PPD, primiparous women among the floating population require effective and accessible mental health care after childbirth, such as early PPD screening and timely therapeutic methods.

Development of a Mobile Application of Internet-Based Support Program on Parenting Outcomes for Primiparous Women.

Primiparous women usually experience various parenting problems after childbirth that have negative effects on the well-being of mothers and infants. Although e-Support technology could provide an innovative and easily accessible intervention approach, mobile-phone interventions remain limited for Chinese primiparous women. Therefore, a new mobile application (APP) called the "Internet-based Support Program" ("ISP") was designed, incorporating the self-efficacy theory and the social-exchange theory for Chinese first-time mothers to improve their levels of maternal self-efficacy (MSE), social support, and satisfaction, as well as to reduce their postpartum depression symptoms. The research was conducted to develop and optimize the "ISP" APP for new mothers via a theory-, evidence-, and person-based approach. Five modules of "learning forum", "communication forum", "ask-the-expert forum", "baby home forum", and "reminder forum" were included in the APP to meet various parenting needs of first-time mothers; and its contents and functions were validated by the experts and primiparous women. The majority of participants gave positive feedback on the APP's perceived ease of use and usefulness. The "ISP" APP was the first designed for Chinese primiparous women, and a multicenter randomized controlled trial (RCT) will be conducted to measure its effectiveness on parenting outcomes.