Nonrestorative Sleep and Type 2 Diabetes Incidence: the Aichi Workers' Cohort Study.

BACKGROUND: The term "nonrestorative sleep (NRS)" refers to unrefreshed feeling at wake-up and is a domain of poor sleep quality. Previous researches have demonstrated that NRS is linked to a number of diseases and adverse health outcomes, but less is known regarding the link between NRS and diabetes, particularly in Japanese. METHODS: We studied 3665 middle-aged male participants of the Aichi Workers' Cohort Study who were followed-up from 2002 to 2019. Cox proportional hazards models estimated hazard ratios (HRs) and 95% confidence intervals (CIs) of incident type 2 diabetes mellitus (T2DM) in relation to NRS adjusted for potential confounding variables. RESULTS: During a median follow-up of 14.6 years, 421 type 2 diabetes cases were identified. Participants with NRS had a higher crude incidence rate of T2DM (11.2/1,000 person-years), compared to participants without NRS (9.3/1,000 person-years). In the fully adjusted model, individuals who reported having NRS had a significantly higher risk of developing T2DM (HR: 1.36, 95% CI: 1.10-1.67). The association was observed only in participants under 50 years old (HR: 1.82, 95% CI: 1.36-2.43), not in the older (50 years or older) participants (P for interaction =0.025). In contrast, stratified analyses by the presence of shift work, obesity or sleep duration showed similar associations in all the strata. CONCLUSIONS: NRS was associated with higher risk of T2DM in middle-aged Japanese male workers independent of a variety of lifestyle factors and other sleep problems.

Impact of perineal pain and delivery related factors on interference with activities of daily living until 1 month postpartum: A longitudinal prospective study.

BACKGROUND: Interference with activities of daily living can negatively impact maternal practices both physically and psychologically. This study aimed to explore the patterns of interference with activities of daily living and perineal pain among Japanese women until 1 month postpartum. Furthermore, we aimed to describe how both perineal pain and delivery-related factors were associated with interference with activities of daily living. METHODS: This study was part of a larger prospective longitudinal study conducted at five maternity hospitals in Japan. The participants were 293 women who had full-term vaginal deliveries and singleton infants. Participants self-evaluated their perineal pain and interference with activities of daily living using a 100 mm visual analogue scale and 'behaviour that interferes with daily life scale' at day 1, day 5, and 1 month postpartum. We used a linear mixed model to calculate the fixed-effects parameter estimates and their 95% confidence intervals. Interference with activities of daily living, which included difficulty sitting, difficulty moving, and difficulties with excretion and cleanliness, were set as the dependent variables. RESULTS: The final analysis included 184 participants with a mean age of 31.5±4.5 years. Perineal pain and the three sub-scales of interference with activities of daily living reduced from day 1 to 5 postpartum, and further from day 5 to 1 month postpartum (perineal pain, p<0.01, p<0.01; difficulty sitting, p<0.01, p<0.01; difficulty moving, p<0.01, p<0.01; difficulties with excretion and cleanliness, p<0.01, p<0.01). These tendencies did not change, even adjusted for independent variables using a mixed model. In the mixed model for follow-up data, perineal pain was a significantly and positively associated with three sub-scales of interference with activities of daily living, even after adjusted for perineal injury and episiotomy. CONCLUSIONS: Positive relationships were observed between perineal pain and interference with activities of daily living until 1 month postpartum, although both reduced. To promote maternal role attainment through child-rearing since early postpartum, midwives should pay additional attention to mothers' perineal pain as it could negatively affect their daily life and child-rearing.

Relationship Between Fasting Blood Glucose Levels in Middle Age and Cognitive Function in Later Life: The Aichi Workers' Cohort Study.

BACKGROUND: There is limited evidence regarding the relationship between Diabetes mellitus (DM) in middle age and mild cognitive impairment after a follow-up. Therefore, we investigated the relationship between fasting blood glucose (FBG) levels in middle age and cognitive function assessed using the Japanese version of the Montreal Cognitive Assessment (MoCA-J) in later life, following over 15 years of follow-up in the Aichi Workers' Cohort Study in Japan. METHODS: Participants were 253 former local government employees aged 60-79 years in 2018 who participated in a baseline survey conducted in 2002. Using baseline FBG levels and self-reported history, participants were classified into the normal, impaired fasting glucose (IFG) and, and DM groups. Total MoCA-J score ranges from 0 to 30, and cognitive impairment was defined as MoCA-J score ≤25 in this study. A general linear model was used to estimate the mean MoCA-J scores in the FBG groups, adjusted for age, sex, educational year, smoking status, alcohol consumption, physical activity, body mass index, systolic blood pressure, total cholesterol, and estimated glomerular filtration rate. RESULTS: The mean MoCA-J score in the total population was 25.0, and the prevalence of MoCA-J score ≤25 was 49.0%. Multivariable-adjusted total MoCA-J scores were 25.2, 24.8, and 23.4 in the normal, IFG, and DM groups, respectively. The odds ratio of MoCA-J score ≤25 in the DM group was 3.29. CONCLUSION: FBG level in middle age was negatively associated with total MoCA-J scores assessed later in life, independent of confounding variables.

Increased afternoon step count increases heart rate variability in patients with cardiovascular risk factors.

AIMS AND OBJECTIVES: The present study investigated whether morning or afternoon activity is more effective at increasing the high-frequency (HF) index, a parasympathetic index, in patients with cardiovascular risk factors. BACKGROUND: A decreased HF index, a heart rate variability (HRV) parameter, is a well-established marker of poor cardiovascular prognosis. Because blood pressure and sympathetic tone are higher in the morning, physical activity and exercise in the afternoon has been recommended for patients with cardiovascular diseases. However, there have been no reports concerning the superior effects of afternoon exercise on parasympathetic activity and sleep. DESIGN: This observational study was a post hoc comparison. METHODS: Patients' physical activity was measured for 1 month to determine their habits. Patients' HF index was measured by 24-h Holter electrocardiography. The study enrolled 56 patients. Each patient's morning step count (before lunch) and afternoon step count (between lunch and dinner) were compared. We adhered to the STROBE guidelines in the present study. RESULTS: Thirty-one patients took more steps in the morning, and 25 patients took more steps in the afternoon. The present study showed that those who took more steps in the afternoon had a significantly higher HF index during the first hour after sleep onset and during sleep than those who took more steps in the morning (p = .003, .047). CONCLUSIONS: The present study showed that those who took more steps in the afternoon had a significantly higher HF index during the first hour after sleep onset and a higher HF index during sleep than those who took more steps in the morning. RELEVANCE TO CLINICAL PRACTICE: Exercise in the afternoon may improve the prognosis in patients with cardiovascular disease by not only preventing excessive blood pressure, afterload, and sympathetic tone but also positively influencing the parasympathetic system and sleep.

Association between caregivers' health-related quality of life and care recipients' health outcomes.

AIMS: This study aimed to investigate the relationship between family caregivers' health-related quality of life and health outcomes in care recipients. METHODS: A total of 160 female caregivers in Japan were initially assessed using self-reported baseline questionnaires to determine physical and mental aspects of their health-related quality of life. Based on these scores, they were divided into three groups: lower, middle, and higher quality of life. We followed up with the 133 participants (after excluding those that did not respond) 6 years later to assess the health of their care recipients; 36 caregivers continued to provide home care, while 97 reported that their care recipient had died or been admitted into institutionalized care. RESULTS: Statistically, a higher risk for care recipients' health deterioration was strongly associated with the mental component score in the lower caregivers' quality of life group of than for the middle group, after adjusting for the care recipients' age, health status, and caregivers' age at baseline. There was no significant association between deterioration of health of care recipients and physical component scores of the caregivers. CONCLUSION: Caregivers' poor health-related quality of life, particularly poor mental health, may be linked to the deterioration of care recipients' health.

Possible Association between Cathepsin V and the Development of Placenta Accreta Spectrum Disorders.

BACKGROUND/AIMS: The study aimed to evaluate molecular changes related to trophoblast adhesion in placenta accreta spectrum (PAS) disorders. METHODS: A retrospective analysis of 10 PAS cases in which both the trophoblast adherent site and the non-adherent site were identified was performed in April 2010 and March 2013. Microarray analysis and reverse transcription polymerase chain reaction (RT-PCR) analyses were performed to extract upregulated genes in the adherent site. Gene expression changes were examined by immunohistochemistry. RESULTS: Microarray analysis showed that 157 transcripts were > 3-fold upregulated, including the following: a disintegrin and metalloproteinase-28 (ADAM28), 3.10-fold; cathepsin V (CTSV), 3.73-fold; cathepsin S (CTSS), 3.46-fold; and matrix metalloproteinase-19 (MMP19), 3.41-fold. RT-PCR showed relatively high mRNA expressions. On immunohistochemistry, extravillous trophoblast (EVT) at the non-adherent site showed weak or no CTSV expression, whereas EVT that invaded myometrium at the adherent site showed strong expression (histological score, median [min-max], 115.6 [37.6-153.6] vs. 184.8 [56.4-222.8], p < 0.05). MMP19 showed moderate staining, with no difference between the adherent and non-adherent sites. ADAM28 and CTSS showed weak or no staining. DISCUSSION: This limited study suggests that CTSV may be involved in the pathogenesis of PAS.

A Point System for Predicting 10-Year Risk of Developing Type 2 Diabetes Mellitus in Japanese Men: Aichi Workers' Cohort Study.

BACKGROUND: Relatively little evidence exists for type 2 diabetes mellitus (T2DM) prediction models from long-term follow-up studies in East Asians. This study aims to develop a point-based prediction model for 10-year risk of developing T2DM in middle-aged Japanese men. METHODS: We followed 3,540 male participants of Aichi Workers' Cohort Study, who were aged 35-64 years and were free of diabetes in 2002, until March 31, 2015. Baseline age, body mass index (BMI), smoking status, alcohol consumption, regular exercise, medication for dyslipidemia, diabetes family history, and blood levels of triglycerides (TG), high density lipoprotein cholesterol (HDLC) and fasting blood glucose (FBG) were examined using Cox proportional hazard model. Variables significantly associated with T2DM in univariable models were simultaneously entered in a multivariable model for determination of the final model using backward variable selection. Performance of an existing T2DM model when applied to the current dataset was compared to that obtained in the present study's model. RESULTS: During the median follow-up of 12.2 years, 342 incident T2DM cases were documented. The prediction system using points assigned to age, BMI, smoking status, diabetes family history, and TG and FBG showed reasonable discrimination (c-index: 0.77) and goodness-of-fit (Hosmer-Lemeshow test, P = 0.22). The present model outperformed the previous one in the present subjects. CONCLUSION: The point system, once validated in the other populations, could be applied to middle-aged Japanese male workers to identify those at high risk of developing T2DM. In addition, further investigation is also required to examine whether the use of this system will reduce incidence.

Association between the perspective of adult inpatients with digestive cancer regarding the nursing service and their quality of recovery on postoperative day 3.

Although qualitative research that focuses on inpatients' experience immediately after surgery has continued to elucidate the efficacy of the nursing service for postoperative recovery, there has been little quantitative research. Our aim was to quantitatively clarify the association between inpatients' perception of the nursing service and the quality of postoperative recovery. Seventy-one digestive cancer patients who underwent surgery were recruited. Participants completed two self-administered questionnaires, including the Japanese version of the 40-item postoperative Quality of Recovery scale (QoR-40J) and the Nursing Service Quality Scale for Japan (NURSERV-J) which has 22 items and five dimensions (tangibles, reliability, responsiveness, assurance, and empathy) on postoperative day 3. There were significant positive associations between the global scores of the NURSERV-J and the QoR-40J. The global score of the QoR-40J was compared between patients who gave full marks for each dimension of the NURSERV-J (the entirely satisfied group) and those who did not (the not entirely satisfied group). The entirely satisfied groups regarding tangibles, reliability and responsiveness had a significantly higher global score for the QoR-40J than the respective not entirely satisfied groups. Adjusted for age, gender, operative procedure, and duration of surgery, the entirely satisfied groups regarding tangibles and responsiveness had a significant higher global score for the QoR-40J than the respective not entirely satisfied groups. Patients who perceived that they had received a nursing service of high quality were likely to attain a high quality of postoperative recovery. Nursing services related to tangibles, reliability, and responsiveness especially contributed to postoperative recovery.

Shoulder stiffness, back pain, and wrist pain: Are older primiparas more vulnerable?

AIM: To describe changes in prevalence of shoulder stiffness, back pain, and wrist pain during the first 6 months postpartum, and to examine the association of these symptoms with maternal age and parity. METHODS: Participants were recruited from 13 Japanese hospitals between 2012 and 2013. A total of 2709 (response rate 71.9%) women provided longitudinal data, using self-report questionnaires at 5 time points: during their hospital stay, and at 1, 2, 4, and 6 months postpartum. Shoulder stiffness, back pain, and wrist pain were measured, using checklists with yes-no responses. The effects of age and parity were assessed in 4 groups of younger (<35 years) and older (≥35 years) mothers: 983 younger primiparas, 481 older primiparas, 649 younger multiparas, and 596 older multiparas. Chi-square tests and Cochran's Q tests were used to assess effects of group and time. RESULTS: Prevalence of shoulder stiffness, back pain, and wrist pain during the hospital stay significantly increased up to 1 month postpartum for older primiparas, who were also the most vulnerable to back pain and wrist pain at 1 month postpartum. CONCLUSION: Special attention should be given to older primiparas in assessing and providing nursing care for physical symptoms, especially during the first month postpartum.

The Positive Association Between Duration of Skin-to-Skin Contact and Blood Glucose Level in Full-Term Infants.

The aim of this study was to evaluate the contribution of the duration of skin-to-skin contact (SSC) on blood glucose levels at 2 hours after birth in healthy full-term infants. This observational study was done at one of the baby-friendly hospitals located in Aichi, Japan in 2009. Sixty newborn infants who were born vaginally from uncomplicated pregnancies were participated. All infants were held SSC within 5 minutes. All data regarding neonatal information, blood glucose levels at 2 hours of age, and maternal information were obtained from their medical history. Multiple linear regression analysis was performed to identify the independent contribution of the duration of SSC. The mean duration of SSC was 59.6 ± 13.6 minutes (range: 11.0-97.0 minutes) and the infant blood glucose level was 53.1 ± 9.5 (range: 30.0-80.0 mg/dL) mg/dL. The duration of SSC (ß [95% confidence interval] = .282 [range: 0.037-0.357], standardized ß = .282, P < .017) was significantly and positively associated with infant blood glucose levels independent of gestational age, birth weight, sex, length of second-stage labor, and mode of delivery. Thus, the longer early SSC was associated with higher blood glucose level at 2 hours of age in healthy full-term infants.

Relationship between the mode of conception and depressive symptoms during the first 6 months post-partum in Japan.

PURPOSE: To determine whether conventional treatment and assisted reproductive technology for infertility are associated with depressive symptoms and to identify the predictors of depressive symptoms during the first 6 months' post-partum. METHODS: A prospective cohort design was used, with the participants being recruited from 13 Japanese hospitals. Using self-report questionnaires, a total of 2709 women (response rate: 71.9%) provided longitudinal data at five time points: during their hospital stay and at 1, 2, 4, and 6 months' post-partum. The depressive symptoms were measured by using the Japanese version of the Edinburgh Postnatal Depression Scale (EPDS). A logistic regression analysis was used to examine the association between the mode of conception and depressive symptoms and to identify the predictors of the depressive symptoms. RESULTS: There was no significant association between the mode of conception and the depressive symptoms at any time point. Six factors that were associated with the EPDS score were first-time childbirth, emergency cesarean delivery, infant feeding, financial burden, having a male infant, and dissatisfaction with social support. CONCLUSION: There was no significant relationship between the mode of conception and depressive symptoms. Nursing care should be based on individual assessments that focus on parity, the delivery method, infant feeding method, financial burden, the infant's sex, and social support, rather than on the mode of conception.

[The relationship between parenting anxiety in mothers and the resources from which they routinely sought advice: The final "Healthy Parents and Children 21" survey].

Objectives　This study aimed to examine the relationship between parenting anxiety in mothers and the resources from which they routinely sought advice.Methods　Data consisted of the 75,662 survey responses from parents of children who had undergone health checkups between April and August of 2013. A logistic regression analysis was performed using parenting anxiety (computed using the responses to the two survey items "I don't feel confident as a parent" and "I wonder if I'm mistreating my child") as the response variable. The people or resources from which the mothers sought parenting advice and the number of such resources were used as the explanatory variables.Results　Across all ages, the percentage of mothers selecting "husband" as a parenting resource was the largest, and most mothers indicated they had three resources. Common across all ages, mothers who indicated that they had their husband or the child's grandmother or grandfather as resources had a significantly lower odds ratio of having parenting anxiety than mothers who did not. In contrast, mothers who selected "nursery school or kindergarten teachers" or "the Internet" as resources had a significantly higher odds ratio of having parenting anxiety than mothers who did not select these resources. Across all ages, no significant relationship was found between mothers' parenting anxiety and the number of resources they used for parenting advice. There was a significantly higher odds ratio of mothers of children aged 18 and 36 months who indicated that they wondered if they were mistreating their child if they had nobody to talk to than if they had one resource. When the number of resources increased to three, four, or five, the odds ratio was significantly reduced.Conclusion　For mothers of children of all ages, results showed that those who routinely sought advice from their husband or their child's grandparents had a significantly lower probability of experiencing parenting anxiety. On the other hand, this probability was significantly higher when their resources were nursery school or kindergarten teachers or the Internet. This study also suggests that, for mothers of young children, having a larger number of people from whom to routinely seek advice may reduce their anxiety about their parenting ability.

Association between physical and depressive symptoms during the first 6 months postpartum.

AIM: To examine the relationship between physical symptoms and depressive symptoms among new mothers during the first 6 months postpartum. METHODS: Prospective cohort study design was used in this study. Participants were recruited in 13 Japanese hospitals between 2012 and 2013. A total of 2709 women (response rate of those invited 71.9%) provided longitudinal data using self-report questionnaires at 5 time points: during the hospital stay and at 1, 2, 4, and 6 months postpartum. Depressive symptoms were measured using the Japanese version of the Edinburgh Postnatal Depression Scale. Also, 37 physical symptoms were measured using a yes-or-no checklist. To examine the association between physical symptoms and depressive symptoms, logistic regression analysis was used. RESULTS: There was a significant positive association between physical symptoms and depressive symptoms during the first 6 months postpartum. Fifteen physical symptoms were associated with significantly increased odds of depression at 1, 2, 4, and 6 months post-partum. These symptoms included: loss of appetite, tiredness/languor, and palpitation/shortness of breath. CONCLUSION: Multiple physical symptoms after childbirth were associated with depressive symptomatology. Health professionals should assess for postpartum depression when puerperal women report multiple physical symptoms as independent complaints.

Fatigue, depression, maternal confidence, and maternal satisfaction during the first month postpartum: A comparison of Japanese mothers by age and parity.

The aim of the study was to assess fatigue, depressive symptoms, and maternal confidence or satisfaction among older primiparae during the first month postpartum. The number of older Japanese primiparae has rapidly increased. Older primiparae are believed to be at high risk for puerperal morbidity. A multicentre prospective cohort study design was used. Data were examined from 2854 Japanese women who participated in a 6-month prospective cohort study conducted between May 2012 and September 2013. The women were classified into 4 groups based on maternal age and parity. All participants completed the Postnatal Accumulated Fatigue Scale, Japanese Edinburgh Postnatal Depression Scale, Postpartum Maternal Confidence Scale, and Postpartum Maternal Satisfaction Scale. Primiparae in all age groups were more severely fatigued and had a higher risk of postpartum depression than multiparous mothers during the first month postpartum. Older primiparae had significantly lower scores on maternal confidence and maternal satisfaction than the other 3 groups at 1 month postpartum. These findings suggest that postpartum nursing should focus on promoting adequate sleep, providing emotional support, and fostering the process of maternal role adaptation among older Japanese primiparae, particularly during the first postpartum month.

Palliative care and nursing support for patients experiencing dyspnoea.

To investigate the association between the type of support provided by nurses for dyspnoea and palliative care practice in Japan, a cross-sectional questionnaire survey was conducted in 2015. Of the 535 questionnaires sent to nurses working at 22 designated cancer hospitals, 344 were returned. The questionnaire assessed the demographic characteristics of the nurses, nursing support for dyspnoea, and palliative care practice measured by the 'Palliative care self-reported practices scale'. Multivariate analysis showed that the domains of palliative care practice influenced the provision of nursing support for patients with dyspnoea. In conclusion, palliative care practice is important for supporting patients with dyspnoea, and nurses should possess the requisite knowledge and skills to deliver this care appropriately.

Perinatal outcomes of abnormal umbilical coiling according to a modified umbilical coiling index.

AIM: The aim of this study was to determine the relation between perinatal outcomes and umbilical cord coiling as evaluated by a modified umbilical coiling index. METHODS: In this retrospective study, 200 consecutive umbilical cords were examined. An umbilical venous and arterial coiling index was calculated by dividing the total number of umbilical venous and arterial coils by the length of cord individually. Umbilical cords with umbilical venous coiling indices in the lowest decile, the highest decile, and the remaining deciles were defined as hypocoiled, hypercoiled, and normocoiled, respectively. The perinatal outcomes of the subjects with hypocoiled and hypercoiled umbilical cords were compared with those with normocoiled umbilical cords. RESULTS: In 69.5% of subjects, a difference in the degree of coiling was detected between the umbilical veins and arteries. While all umbilical venous twisting demonstrated the same direction, the direction of the arterial twisting reversed at a certain point along the umbilical cord in 19.0% of the subjects. The arteriovenous coiling difference was small in the hypercoiled group and large in the hypocoiled group. A hypocoiled umbilical cord evaluated by umbilical venous coiling index was found to be associated with prolonged deceleration (odds ratio [OR], 4.18; 95% confidence interval [CI], 1.54-11.38), operative delivery (OR, 2.67; 95%CI, 1.01-7.09), and nuchal cord entanglement (OR, 3.21; 95%CI, 1.23-8.33). CONCLUSION: Umbilical coiling abnormalities were investigated using a novel umbilical venous coiling index. A hypocoiled umbilical cord evaluated by umbilical venous coiling index was found to be associated with fetal heart rate abnormalities, operative delivery, and nuchal cord entanglement.

Gestational Trophoblastic Neoplasia and Pregnancy Outcome After Routine Second Curettage for Hydatidiform Mole A Retrospective Observational Study.

OBJECTIVE: To investigate gestational trophoblastic neoplasia (GTN), fertility, and pregnancy outcome in molar patients who underwent routine second curettage. STUDY DESIGN: Eighty-two patients who visited our hospital for hydatidi- form mole between 2002 and 2011 were registered in this study. All patients had sec- ond curettage around the 7th day after first evacuation. We performed retrospective analysis on several factors between a remission group and a GTN group. RESULTS: Fourteen patients (17.1%) had chemotherapy after being diagnosed with GTN. Multivariate analysis revealed that the hCG value before first evac- uation was only one independent prognostic factor for GTN. The median follow-up period was 45.5 months, and 41 patients had 62 pregnancies after remission of hydatidiform mole and GTN. The fertility rate was 80% in 45 patients with desire for a baby, and 39 pregnancies (62.9%) ended in live births without congenital malformation. CONCLUSION: The incidence of GTN was not lower in hydatidiform mole with routine second curettage. An independent prognostic factor for GTN- was the hCG value before the first evac- uation in molar patients. Our results suggest that rou- tine second curettage does not affect the fertility rate or increase a risk of adverse outcomes in subsequent prej- nancies.

Caregiving activities closely associated with the development of low-back pain among female family caregivers.

AIMS AND OBJECTIVES: To describe what effects low back pain has on the daily lives of female family caregivers and to elucidate the caregiving factors associated with its development. BACKGROUND: Low back pain is a common musculoskeletal symptom in caregivers. However, few detailed studies have examined the association of low back pain with the daily lives of female family caregivers or which caregiving activities lead to their low back pain. The elucidation of these issues will contribute to the prevention and treatment of their low back pain. DESIGN: A cross-sectional study. METHODS: Japanese female family caregivers (n = 156) completed a self-administered questionnaire assessing lifestyle, health status, daily activity and caregiving situation. Correlation analysis measured the association between low back pain and daily activity. Logistic regression analysis identified care activities related to low back pain. RESULTS: Thirty-five (22·4%) participants almost always experienced low back pain. The severity of low back pain was significantly and positively associated with difficulty in daily activities, especially bending and extending the lower back. As for care situation factors and caregiving activities, night care, assisting the family member to stand up and to lie down, dealing with problem behaviours, and taking medication were associated with the development of low back pain. After reclassifying the respective caregiving activities, those involving body repositioning and those mainly performed in a static position showed significant associations. CONCLUSIONS: Low back pain in female family caregivers negatively affects their daily activities and certain caregiving activities are involved in the development of low back pain. RELEVANCE TO CLINICAL PRACTICE: Clinical nurses understand the situation of female caregivers and could prevent the development of low back pain with early intervention by providing adequate strategies to alleviate the burden of identified care activities related to low back pain.

Cross-sectional and longitudinal validation of a 13-item fatigue scale among Japanese postpartum mothers.

This study examined the psychometric properties of a 13-item fatigue scale for postpartum mothers. Japanese mothers (n = 2026) from a cohort study completed questionnaires (e.g. fatigue scale, Japanese version of the Edinburgh Postnatal Depression Scale, demographics) during their hospital stay after childbirth (baseline) and at 1, 2, 4 and 6 months postpartum. Initial factor analysis of baseline data revealed that the fatigue scale had three factors or subscales (physical, emotional and cognitive). Within-group analysis across each measurement time revealed the same three-factor structure with acceptable fit. Between-group analysis also showed longitudinal factorial invariance across time. The fatigue subscales had acceptable divergent and convergent validities with the depression scale. The subscale scores differed significantly based on participant background. The Japanese Fatigue Scale is a concise and informative tool for assessing aspects of fatigue in clinical settings and in the community.

Factors affecting maternal confidence and satisfaction in older Japanese primiparae during postpartum hospital stay.

The purpose of this study was to identify factors affecting maternal confidence and satisfaction in older Japanese primiparae during their postpartum hospital stay. Participants were Japanese primiparae (age ≥ 35) who delivered live singleton infants (n = 479). Questionnaires completed 1 day before discharge from hospital included the Postpartum Maternal Confidence Scale and the Postpartum Maternal Satisfaction Scale. Data were analysed using stepwise multiple regression for maternal confidence and stepwise logistic regression for maternal satisfaction, after controlling for delivery mode. Maternal confidence was negatively affected by feeling overwhelmed by postpartum routines, needing a longer time for feeding, and a pregnancy with complications. Satisfaction with the birth experience and a longer rooming-in period were related to greater maternal satisfaction. Lack of prior experiences with caring for babies and lack of communication with their partner about parenting role were also associated with lower confidence and satisfaction. These findings provide an important framework for nurses to teach and counsel older first-time mothers.