Associations between levels of physical literacy and adherence to the 24-h movement guidelines among university students: A cross-sectional study.

Objectives: Emerging evidence indicates that the composition of movement behaviours within a 24-h period is associated with multiple health benefits across the lifespan. A concept that emphasises an individual's active lifestyle is physical literacy (PL), yet empirical research exploring the potential associations between PL and 24-h movement guidelines remains scarce. This study aimed to evaluate the associations between levels of PL and adherence to the guidelines among Chinese university students. Study design: A cross-sectional study. Methods: Seven hundred and ninety-eight university students (390 male, 19.2 ± 1.2 years) completed all the measurements. Levels of PL and participants' adherence to guidelines including physical activity, sedentary behaviour and sleep were self-reported through Perceived Physical Literacy Instrument, International Physical Activity Questionnaire and Pittsburgh Sleep Quality Index, respectively. Two-way ANOVA was conducted to determine the associations between the number of guidelines met (0, 1, 2, or 3) and levels of PL. Results: The results demonstrate that 36.5% (n = 291) of the participants met all the three guidelines, while 4.1% (n = 33) met none. Further analysis indicated that meeting physical activity or sedentary behaviour guidelines was associated with significantly higher total PL scores, and scores in the sub-domains of Confidence and Physical Competence and Motivation. Conclusions: The findings provide evidence that young adults who obtained higher PL scores may meet more guidelines during a 24-h period. Future studies should incorporate accelerometer-based physical activity measurements and investigate the causal relationship between PL and adherence to the movement guidelines.

[A real-world study on the features of postpartum hepatitis flares in pregnant women with chronic HBV infection].

Objective: To analyze the clinical features of postpartum hepatitis flares in pregnant women with hepatitis B virus (HBV) infection. Methods: A retrospective study was conducted. Patients who met the enrollment criteria were included. Liver function and HBV virology tests were collected from pregnant women with chronic HBV infection at delivery, 6, 24, 36, and 48 weeks after delivery through the hospital information and test system. Additionally, antiviral therapy types and drug withdrawal times were collected. Statistical analysis was performed on all the resulting data. Results: A total of 533 pregnant women who met the inclusion criteria were included, with all patients aged (29.5±3.7) years old. A total of 408 cases received antiviral drugs during pregnancy to interrupt mother-to-child transmission. There was no significant difference in the levels of alanine aminotransferase (ALT, z = -1.981, P = 0.048), aspartate aminotransferase (AST, z = -3.956, P < 0.001), HBV load (z = -15.292, P < 0.001), and HBeAg (z = -4.77, P < 0.001) at delivery in patients who received medication and those who did not. All patients ALT, AST, total bilirubin, direct bilirubin, and albumin showed an upward trend within six weeks after delivery. A total of 231 cases developed hepatitis within 48 weeks after delivery. Among them, 173 cases first showed ALT abnormalities within six weeks postpartum. Conclusion: Hepatitis flare incidence peaked six weeks after delivery or six weeks after drug withdrawal in pregnant women with chronic HBV infection.

[Pelvic radiotherapy strategy for rectal cancer with hepatic metastasis].

Hepatic metastasis is the most common in rectal cancer, and patients with resectable hepatic metastasis have better survival. Pelvic radiotherapy has become a key component of multidisciplinary management of rectal cancer with hepatic metastasis. For patients with unresectable hepatic metastasis, palliative radiotherapy to the primary lesion can reduce the risk of bleeding and obstruction and thus improve the quality of life. For patients with resectable hepatic metastasis, pelvic radiotherapy can effectively reduce the local recurrence rate, help some patients avoid surgery and improve their quality of life, and even improve the overall survival. At present, there is no consensus on the standardized treatment mode of pelvic radiotherapy for rectal cancer patients with hepatic metastasis, and it has become a hotspot for research on how to select the population benefiting from radiotherapy, how to optimize multidisciplinary collaboration and radiotherapy plans (long-course radiotherapy versus short-course radiotherapy) and how to preserve organs. This article reviews the research progress in pelvic radiotherapy for rectal cancer with hepatic metastasis in recent years, and provides ideas for individualized pelvic radiotherapy for rectal cancer with hepatic metastasis.

[Analysis of 9 cases of pediatric-type follicular lymphoma].

Objective: To summarize the pathological diagnosis, clinical features, treatment methods and outcomes of pediatric-type follicular lymphoma (PTFL). Methods: Clinical data including the pathology, clinical features, treatment methods, and follow-up results of 9 PTFL patients admitted to Henan Cancer Hospital from February 2017 to February 2023 were analyzed retrospectively. Results: The age of onset in 9 children was 6 to 18 years, all the patients were males. The clinical manifestation was local painless lymph node enlargement in the head and neck, with a stage of Ⅰ-Ⅱ. The histomorphological characteristics of PTFL were similar to those of classic follicular lymphoma (FL). The germinal center of most follicles were enlarged, the mantle zone disappeared, centroblasts were easily visible, and the histological grade were mostly grade Ⅲ, which may be accompanied by the "starry sky" phenomenon. Monoclonal peaks can be seen in B cell clonal rearrangements (BCR). Immunohistochemistry (IHC) showed CD20 positive, CD10 positive, Bcl-6 positive, Bcl-2 negative, C-myc negative, and Ki-67 was 70%-95%. Fluorescence in situ hybridization (FISH) test was negative for t (14, 18), Bcl-2 translocation, and C-myc translocation. Six cases underwent surgical resection, and 3 cases underwent surgical resection combined with chemotherapy. Up to February 2023, with a follow-up time of 45 to 72 months, all children survived without any recurrence and were in a complete remission state. Conclusions: PTFL is mainly characterized by adolescent male onset, with early clinical manifestations and pathological manifestations of high-level histological status, high proliferation index, and lack of t (14; 18)/Bcl-2 translocation and Bcl-2 expression. It is mainly treated by localized surgical excision and has a good prognosis.

[Efficacy and safety analysis of umbilical cord blood combined with haploid hematopoietic stem cell transplantation in the treatment of malignant hematological malignancies].

Objective: To investigate the efficacy and safety of umbilical cord blood combined with haploid HSCT (haplo-cord HSCT) in the treatment of hematological malignancies. Methods: The data of 82 patients with hematologic malignancies who received haplo-cord HSCT from January 2017 to June 2021 in the Affiliated Cancer Hospital of Zhengzhou University were retrospectively analyzed. There were 52 male and 30 female patients, aged [M(Q1, Q3)] 29 (20, 41) years. All patients received myeloablative preconditioning regimen. The day of the donor stem cell infusion was recorded as day 0 (0 d), the day before the infusion was recorded as day-1 (-1 d), and the day after the infusion was recorded as day+1 (+1 d), and so on. Eighty-two patients received transfusion of peripheral blood and/or bone marrow stem cells from unrelated cord blood and haplotype donors after the myeloablative preconditioning regimen. The graft-versus-host disease (GVHD) prophylaxis regimen was 8 mg/kg ATG combined with cyclosporine, morte-macrolide, and methotrexate. Patients were evaluated for implantation and the occurrence of transplant-related complications such as GVHD, infection, hemorrhagic cystitis, and long-term patient survival. Results: The time of neutrophil engraftment [M(Q1, Q3)] was 13 (11, 15) days and 15 (13, 21) days for platelet. The 30-day cumulative incidence of neutrophil engraftment was 98.8% (81/82) and 100-day cumulative incidence of platelet engraftment was 92.7% (76/82). The cumulative incidence of acute graft-versus-host disease (aGVHD) in degree Ⅱ-Ⅳ and Ⅲ-Ⅳ was 24.4% (20/82) and 6.1% (5/82), respectively. The cumulative incidence of chronic GVHD in+18 months was 13.5% (11/82). The follow-up time [M(Q1, Q3)] was 26 (13, 41) months, and the overall survival (OS) rate, event-free survival (EFS) rate, cumulative recurrence rate (CIR) and non-recurrence mortality (NRM) rate at 3 years after transplantation were 70.5% (95%CI: 59.7%-81.3%), 66.1% (95%CI: 56.1%-76.1%), 6.3% (95%CI: 5.7%-26.9%) and 20.8% (95%CI: 12.0%-29.6%), respectively. The cumulative incidence of cytomegalovirus and EBV reactivation was 37.8% (31/82) and 14.6% (12/82), respectively. The cumulative incidence of hemorrhagic cystitis was 32.9% (27/82). Conclusion: The efficacy of haplo-cord HSCT in the treatment of hematologic malignancies is reliable, with rapid hematopoietic reconstitution, low incidence of GVHD and virus reactivation.

[Perioperative radiotherapy on local-advanced gastric cancer--From the perspective of failure pattern].

Distant metastasis, peritoneal recurrence and locoregional recurrence are the three major patterns of gastric cancer (GC) recurrence after surgery and the causes of patients'death. Among them, distant organ metastasis or peritoneal recurrence after surgery is more common and occurs earlier, while locoregional failure alone occurs later with a relatively lower incidence. Several studies have confirmed that preoperative radiotherapy can shrink tumors and increase R0 resection rates, and postoperative radiotherapy helps reduce local recurrence. However, whether perioperative radiotherapy can further improve patient survival is still controversial.. We believe that this is partly due to the characteristics of recurrence and metastasis. As a local treatment, radiotherapy is complement to the inadequacy of surgery. Thus, we believe that perioperative radiotherapy is not recommended for patients with standard R0 surgery and adequate lymph node dissection, but rather requires accurate prediction of their recurrence and metastasis patterns based on accurate clinical and pathological staging, and thus screening of those who may benefit from radiotherapy.

A binary pulsar in a 53-minute orbit.

Spider pulsars are neutron stars that have a companion star in a close orbit. The companion star sheds material to the neutron star, spinning it up to millisecond rotation periods, while the orbit shortens to hours. The companion is eventually ablated and destroyed by the pulsar wind and radiation1,2. Spider pulsars are key for studying the evolutionary link between accreting X-ray pulsars and isolated millisecond pulsars, pulsar irradiation effects and the birth of massive neutron stars3-6. Black widow pulsars in extremely compact orbits (as short as 62 minutes7) have companions with masses much smaller than 0.1 M⊙. They may have evolved from redback pulsars with companion masses of about 0.1-0.4 M⊙ and orbital periods of less than 1 day8. If this is true, then there should be a population of millisecond pulsars with moderate-mass companions and very short orbital periods9, but, hitherto, no such system was known. Here we report radio observations of the binary millisecond pulsar PSR J1953+1844 (M71E) that show it to have an orbital period of 53.3 minutes and a companion with a mass of around 0.07 M⊙. It is a faint X-ray source and located 2.5 arcminutes from the centre of the globular cluster M71.

Steinernema populi n. sp. (Panagrolaimomorpha, Steinernematidae), a new entomopathogenic nematode species from China.

Steinernema populi n. sp. was recovered by baiting from beneath poplar trees in China. Morphological and molecular features provided evidence for placing the new species into the Kushidai clade. The new species is characterized by the following morphological features: third-stage infective juveniles (IJ) with a body length of 1095 (973-1172) µm, a distance from the anterior end to excretory pore of 77 (70-86) µm and a tail length of 64 (55-72) µm. The Body length/Tail length (c) ratio and Anterior end to Excretory pore/ Tail length × 100 (E%) of S. populi n. sp. are substantially greater than those of all other 'Feltiae-Kushidai-Monticolum' group members. The first-generation males can be recognized by a spicule length of 66 (57-77) µm and a gubernaculum length of 46 (38-60) µm. The new species is further characterized by sequences of the internal transcribed spacer and partial 28S regions of the ribosomal DNA. Phylogenetic analyses show that Steinernema akhursti and Steinernema kushidai are the closest relatives to S. populi n. sp.

[Phenotypic and genomic characterization for Salmonella isolates recovered from meat products in Beijing wholesale markets, 2014-2015].

Objective: To analyze the phenotypic and genomic characteristics of Salmonella isolates recovered from meat products in Beijing wholesale markets. Methods: A total of 336 Salmonella strains from meat products collected from wholesale markets in Beijing were tested for antimicrobial resistance to 25 antimicrobial compounds by micro-broth dilution method; whole genome data were sequenced, followed by the serotype and ST type prediction by Seqsero2 and SISTR software, and the drug resistance genes and virulence factors were also predicted with CARD and VFDB databases of Abricate software; Salmonella serotyping assay kit and serum agglutination method were used for serotype confirmation of some isolates with different genome prediction results. Results: The resistance rates to Nalidixic acid and Ampicillin were 62.5% (210/336) and 55.1% (185/336), respectively, and all isolates were susceptible to Tigecyclin, Cefoxitin and Carbapenem antimicrobial compounds; 207 isolates (61.6%, 207/336) were multi-drug resistant, some could even be resistant to ten categories of drugs at the same time, and the most common antimicrobial resistance spectrum was NAL-AMP-SAM. A total of 24 serotypes were detected with predominant serotypes of Enteritidis (34.5%, 116/336), Derby (17.3%, 58/336) and Indiana (10.4%, 35/336). A total of 27 ST types were detected, the dominant type was ST11; ST types were in good consistency with serotypes; The detection rates of resistant genes referred to aminoglycosides, fluoroquinolones, ß-lactams, sulfonamides and tetracyclines are more than 48%, and the first two reached 100%. The prediction of drug resistance genes was consistent with the results of antimicrobial resistance phenotype. A total of 122 virulence genes were predicted, 74 of which existing among all isolates. Conclusion: Salmonella in meat from the wholesale markets of Beijing has a high proportion of multiple drug resistance, a complex drug resistance spectrum, a variety of serotypes and ST types, and a high carrying rate of drug resistance gene and virulence gene; drug resistance phenotype and genotype are relatively consistent.

[Neurofibromatosis type 1 initially presented with glaucoma in the Department of Ophthalmology: a case report].

An eleven-year-old boy visited the Department of Ophthalmology due to visual acuity loss accompanied by high intraocular tension in the left eye for one year. Besides glaucoma, the typical ocular manifestations of neurofibromatosis type 1 such as bilateral Lisch nodules of the iris, multiple patchy choroidal nodules and retinal microvascular abnormalities were identified, and Cafe-au-lait macules appeared on the body skin. Based on the medical history, clinical presentation and auxiliary examination results, the diagnosis of neurofibromatosis type 1 with secondary glaucoma in the left eye was confirmed.

[Analysis on serotype and antimicrobial resistance of invasive non-typhoidal Salmonella].

Objective: To investigate the serotypes and antimicrobial resistance of seven invasive non-typhoidal Salmonella (iNTS) isolates. Methods: For 7 iNTS strains collected, serotype identification, antimicrobial susceptibility testing and whole genome sequencing were performed. We identified, annotated and analyzed the serotypes, MLST types, and antimicrobial resistance genes. Results: Among the 7 tested iNTS isolates, we found one Salmonella Typhimurium strain and two Salmonella Ⅰ 4, [5], 12: i:- strains whose MLST types were ST34, two Salmonella Enteritidis strains, one Salmonella Corvallis strain and one strain of unknown serotype with the antigenic formulae of Ⅰ 4, [5], 12: d:- (ST279 type). Six of seven strains were monophasic and the deletion or pseudogenization of Salmonella Flagellum gene might contribute to the enhancement of Salmonella invasiveness. None was found to be resistant to tigarcycline, aztreonam, amikacin, cephalosporins and carbapenem and one Salmonella Typhimurium strain was found to be co-resistant to eight classes of antimicrobials at the same time. Resistance genes were generally in accord with relative resistant phenotypes. Conclusion: The iNTS strains could show high level multi-drug resistance, indicating that close attention should be paid to the resistance of iNTS though the overall resistance might be relatively not high.

[Analysis of fundus examination results in 8 808 pediatric patients in Northwest China].

Objective: To explore the incidence and age distribution of fundus abnormalities in pediatric patients aged 0-3 years in northwest China. Methods: A retrospective study of the clinical data of 8808 pediatric patients aged 0-3 years who underwent fundus examination with a wide-filed digital retinal imaging system and an indirect ophthalmoscope in our hospital from January 2008 to December 2019 were performed. There were 5092 males and 3716 females, with a median age of 1 month (range, 3 days to 3 years), a mean gestational age of 34.32 (SD 2.92) weeks (range, 24 to 42 weeks) and a mean birth weight of 2006.92 (SD 709.23) g (range, 490 to 5500 g), from Shaanxi Province (7415 cases, 84.18%), Gansu Province (770 cases, 8.74%), Ningxia Hui Autonomous Region (94 cases, 1.07%), Qinghai Province (53 cases, 0.60%), Xinjiang Uygur Autonomous Region (14 cases, 0.16%) and other neighboring areas (462 cases, 5.25%). The fundus condition of the enrolled pediatric patients was documented to calculate the annual detection rate. The joinpoint regression model was drawn to estimate the annual percent change and average annual percent change. The constituent ratios and age distribution of different types of fundus abnormalities were finally analyzed. Results: Fundus abnormalities were detected in 2 531 cases (28.74%). During the 12 years, the number of pediatric patients undergoing fundus examination each year in our center increased rapidly in the first 7 years, and then kept almost stable, while the number of fundus abnormality cases increased year by year. The positive detection rate showed an overall upward trend with an average annual percent change of +7.2%, and it was +30.09% from 2016 to 2019. Among all the pediatric patients with fundus abnormalities, there were 1 678 cases with developmental diseases (66.30%), 232 cases with hereditary diseases (9.16%), 140 cases with ocular tumor (5.53%), 64 cases with ophthalmic manifestations of systemic diseases (2.53%), 31 cases with ocular trauma (1.23%), 12 cases with infectious diseases or inflammation (0.48%) and 438 cases with other ocular abnormalities (17.31%). The top 5 abnormalities were retinopathy of prematurity (ROP; 1477 cases, 58.36%), gray patchy retinopathy (225 cases, 8.89%), retinal hemorrhage (157 cases, 6.20%), retinoblastoma (137 cases, 5.41%) and familial exudative vitreoretinopathy (77 cases, 3.04%). Fundus abnormalities varied with age. ROP, developmental diseases other than ROP, hereditary diseases, ocular trauma and infectious diseases were mostly detected in pediatric patients at 0-6 months old, while tumors were mostly detected after 1 year old. Conclusions: The detection rate of fundus abnormalities in the Department of Ophthalmology of Xijing Hospital of Air Force Medical University, a tertiary referral center in northwest China, increased notably year by year. The abnormalities were mainly developmental and hereditary lesions as well as of certain age distribution. They occurred with the highest frequency between birth and 6 months of age, in which ROP was in the ascendancy. Meanwhile, the detection rate of other developmental, hereditary and neoplastic disorders increased with age. Therefore, a comprehensive and objective understanding of the fundus disease in infants is essential. (Chin J Ophthalmol, 2021, 57: 777-783).

[Transoral robotic surgery for parapharyngeal space neoplasm: a report of 7 cases].

Objective: To evaluate the safety, efficacy and feasibility of transoral robotic surgery (TORS) for parapharyngeal space (PPS) neoplasms. Methods: We collected data from 7 patients with PPS neoplasm who received TORS in Sun Yat-sen University Cancer Center between May 2017 and November 2020, and patients' clinical and pathological characteristics were analysed. There were 2 men and 5 women with age ranged from 35 to 76 years. Among them, 2 patients underwent secondary surgery, 2 patients required combined transcervical approach to complete surgery, and 1 patient was suspected of ipsilateral cervical lymph node metastasis and scheduled for diagnostic TORS. The preoperative tumor size, operation time, intraoperative blood loss, postoperative bleeding, dyspnea, neurological impairment, feeding time and postoperative hospital stay were analyzed. SPSS 24.0 was used to analyze the data. Results: TORS was performed successfully with complete removal of tumors in all 7 cases. Among 6 patients with curative TORS, 5 patients received TORS with postoperative diagnoses of neurogenic tumors and 1 patient underwent TORS combined transcervical approach with postoperative disgnosis of recurrent pleomorphic adenoma; no intraoperative tumor rupture occurred; the intraoperative blood loss was 20-200 ml with a median of 40 ml; the operation time was 65.0-238.0 min with a median of 77.5 min; the oral feeding time was 3-6 days with a median of 3 days; and the postoperative hospital stay was 4.2±1.6 days. One patient presented with neck swelling 3 days after surgery, but this symptom relieved 3 days later after treatments with antibiotic, hemostasis and detumescence. One patient received diagnostic TORS, as intraoperative pathology indicating a recurrent pleomorphic adenoma, then the neoplasm got completely resected through transcervical-transparotid approach. None of 7 patients manifested with airway obstruction, bleeding or nerve injury symptoms after operation. All patients were followed for 2 to 44 months, no local recurrence or distant metastasis was found. Conclusions: TORS is a safe, effective and feasible treatment for selected PPS neoplasms, with less cosmetic impact, less trauma and blood loss, few postoperative complications, enhanced postoperative recovery and short hospital stay.

[A case of CHARGE syndrome confirmed by ophthalmology].

A 31-month-old female patient presented to our department of Ophthalmology in Xijing Hospital with insufficiency closed eyelid in left eye and photophobia for one month. Unsteady gait with asymmetrical face, bilateral auricle deformity and deafness could be observed on the pediatric patient. Esotropia in left eye combined, left facial nerve palsy, with binocular anisometropia was checked out after general eye examination. Echocardiography revealed that she was treated with ligation of the ductus arteriosus. A de novo pathogenic variant, c.3392T>C, was identified in CHD7 gene, which supported the diagnosis of CHARGE syndrome. (Chin J Ophthalmol, 2021, 57: 618-620).

Pro-angiogenic effect of exosomal microRNA-103a in mice with rheumatoid arthritis via the downregulation of hepatocyte nuclear factor 4 alpha and activation of the JAK/STAT3 signaling pathway.

Rheumatoid arthritis (RA) is characterized by inflammation of the synovial membrane, accompanied by hyperplasia and neo-angiogenesis, which promote local inflammation. Macrophage-derived exosomes have been reported to enhance inflammation and the immune response. In the present study, we identified a novel exosomal microRNA (miR)-103a, which aids in the regulation of inflammation and angiogenesis in mice with RA, and attempted to identify the underlying mechanism. Initially, a mouse model of RA was established. Thereafter, exosomes were isolated from macrophage RAW264.7 cells and evaluated through transmission electron microscopy and nanoparticle tracking analysis. After prediction and verification of the target genes of miR-103a, RT-qPCR was used to assess miR-103a and HNF4A expression in mice with RA. High expression of miR-103a and low expression of HNF4A were observed in mice with RA, thus, miR-103a was found to target and downregulate HNF4A. Exosomal miR-103a promoted inflammation and angiogenesis in mice with RA which was accompanied by an increase in the levels of factors associated with inflammation and angiogenesis. However, an opposite trend was observed upon HNF4A elevation. Exosomal miR-103a was also found to activate the JAK/STAT3 signaling pathway. In conclusion, exosomal miR-103a inhibited the expression of HNF4A to activate the JAK/STAT3 signaling pathway, thereby exacerbating RA in mice.

[The prevalence of retinopathy of prematurity in the mainland of China from 2008 to 2018].

With improved neonatal care, the survival rate of premature infants has been greatly increased, and retinopathy of prematurity (ROP) has already been the leading cause of blindness in children. Thereupon screening and treatment of ROP have been deeply performed in China. However, the implementation and the detection rate vary greatly in different regions. In this article, based on the 20-year prevalence data of ROP in all parts of the country before 2010, we review and summarize the literatures from 2008 to 2018, in order to track and update the screening data of ROP in the mainland of China and to find the incidence trend during the decade. The evidence of the changing prevalence of ROP would benefit further prevention of this serious eye disease. (Chin J Ophthalmol, 2021, 57: 379-385).

[Spontaneous regression of the retinopathy of prematurity].

Retinopathy of prematurity (ROP) has become the leading cause of childhood blindness worldwide. It is the key point of ROP prevention and treatment to screen out and deal with severe ROP that require treatment. However, more than 70% ROP regressed spontaneously without treatment. It is useful in deeply understanding the natural course of ROP and is helpful to develop strategies of ROP screening and prevention, that the characteristics of spontaneous regression of ROP are investigated comprehensively. The epidemic characteristics, clinical features, time course, related factors and visual impairment of ROP regression will be systematically summarized in this review.(Chin J Ophthalmol, 2021, 57: 150-155).

[Predictive value of four score systems on the bleeding risk in atrial fibrillation patients treated with dabigatran].

Objective: To compare the predictive value of HAS-BLED, HEMORR2HAGES, ATRIA and ORBIT scores on the bleeding risk in nonvalvular atrial fibrillation (NVAF) patients treated with dabigatran. Methods: Data of 942 NVAF patients participating a non-interventional prospective study of anticoagulant therapy with dabigatran, which was conducted in 12 centers from February 2015 to December 2017 in China, were analyzed. Complete HAS-BLED HEMORR2HAGES, ATRIA and ORBIT bleeding risk scores data and follow-up data were available in the enrolled patients. The endpoint of the study was bleeding events occurred during a 6 months follow-up. Cox proportional hazards models were constructed to analyze the associations between HAS-BLED, HEMORR2HAGES, ATRIA and ORBIT scores and risk of bleeding, and the area under the curve (AUC) of receiver operating characteristics curves (ROC) of each score was used to set the predictive value for bleeding risk. Results: Among the 942 patients, the mean age was (65.3±11.2) years old, 542 (57.5%) were males. A total of 93 (9.9%) bleeding events occurred during follow up, 89 (9.4%) events were minor bleeding, and 4 (0.4%) events were major bleeding. Patients with a high-risk HAS-BLED score had a 1.87-fold increased risk of bleeding compared with low-risk patients (HR = 2.87, 95% CI:1.26-6.51, P = 0.012). There was no statistically significant difference between low-medium-high-risk grading in other scoring systems and bleeding risk (all P>0.05). The AUC (95%CI) of HAS-BLED, HEMORR2HAGES, ATRIA and ORBIT bleeding risk scores were 0.558 (0.525-0.590), 0.520 (0.487-0.553), 0.513(0.480-0.545), 0.523(0.490-0.555), respectively. The AUC of all bleeding score systems were of ≤ 0.700. Conclusion: Among the NVAF patients taking dabigatran in China, the HAS-BLED bleeding risk score is superior to other 3 bleeding risk score on predicting the bleeding risk in these patients, but its predictive value is still relatively low.

Diagnostic development for parallel wave-number measurement of lower hybrid waves in EAST.

An eight-channel magnetic probe diagnostic system has been designed and installed adjacent to the 4.6 GHz lower hybrid (LH) grill antenna in the low-field side of the Experimental Advanced Superconducting Tokamak (EAST) in order to study the n∥ evolution of LH waves in the first pass from the launcher to the core plasma. The magnetic probes are separated by 6.6 mm, which allows measurement of the dominant parallel refractive index n∥ up to n∥ = 5 for 4.6 GHz LH waves. The magnetic probes are designed to be sensitive to the magnetic field component perpendicular to the background magnetic field with a slit on the casing that encloses the probe. The intermediate frequency stage, which consists of two mixing stages, down-coverts the frequency of the measured wave signals at 4.6 GHz to 20 MHz. A bench test demonstrates the phase stability of the magnetic probe diagnostic system. By evaluating the phase variation of the measured signals along the background magnetic field, the dominant n∥ of the LH wave in the scrape-off layer has been deduced during the 2019 experimental campaign. In the low density plasma, the measured dominant n∥ of the LH waves is about 2.1, corresponding to the main peak 2.04 of the launched n∥ spectrum. n∥ deduced by the least-squares linear fit method remains near this value in the low density plasma with a high spatial correlation magnitude of 0.9. With an eight-channel probe system, a wave-number spectrum has also been deduced, which has a peak near to the measured dominant n∥.