Objective::To build a reference fetal growth chart for the Chinese population based on fetal ultrasound measurements.Methods::This was a multicenter, population-based retrospective cohort study. Longitudinal ultrasound measurement data were collected from 24 hospitals in 18 provinces of China from 1 st September through 31 st October of 2019. The estimated fetal weight (EFW) was calculated based on head circumference, abdominal circumference, and femur length using Hadlock formula 3. Fetal growth curves were estimated using a two-level linear regression model with cubic splines. All participants were divided into two groups: the northern group ( n = 5829) and the southern group ( n = 3246) based on the geographical division of China and male fetus group ( n = 4775) and female fetus group ( n = 4300) based on fetal gender. The EFW was compared by fetal gender and geographical group. All statistical models were adjusted for maternal sociodemographic characteristics. Results::A total of 9075 participants with 31,700 ultrasound measurement records were included in this study. Male fetuses demonstrated significantly larger EFW compared to female ones starting at 16 weeks of gestation and extending to delivery (global test P < 0.01). The overall geographic difference in EFW was significant (global test P = 0.03), and week-specific comparisons showed that the northern group had a greater EFW starting at 15 weeks of gestation and extending to 29 weeks of gestation, although this difference did not extend to the time of delivery. The Z-score of EFW confirmed that our Chinese fetal growth charts differed from previously published standards. Conclusion::This study provides EFW and ultrasound biometric reference measurements for Chinese fetuses and reveals differences from other fetal growth charts. The chart is worth promoting in more regions of China but should be tested prudently before use.

Objective::To build a reference fetal growth chart for the Chinese population based on fetal ultrasound measurements.Methods::This was a multicenter, population-based retrospective cohort study. Longitudinal ultrasound measurement data were collected from 24 hospitals in 18 provinces of China from 1 st September through 31 st October of 2019. The estimated fetal weight (EFW) was calculated based on head circumference, abdominal circumference, and femur length using Hadlock formula 3. Fetal growth curves were estimated using a two-level linear regression model with cubic splines. All participants were divided into two groups: the northern group ( n = 5829) and the southern group ( n = 3246) based on the geographical division of China and male fetus group ( n = 4775) and female fetus group ( n = 4300) based on fetal gender. The EFW was compared by fetal gender and geographical group. All statistical models were adjusted for maternal sociodemographic characteristics. Results::A total of 9075 participants with 31,700 ultrasound measurement records were included in this study. Male fetuses demonstrated significantly larger EFW compared to female ones starting at 16 weeks of gestation and extending to delivery (global test P < 0.01). The overall geographic difference in EFW was significant (global test P = 0.03), and week-specific comparisons showed that the northern group had a greater EFW starting at 15 weeks of gestation and extending to 29 weeks of gestation, although this difference did not extend to the time of delivery. The Z-score of EFW confirmed that our Chinese fetal growth charts differed from previously published standards. Conclusion::This study provides EFW and ultrasound biometric reference measurements for Chinese fetuses and reveals differences from other fetal growth charts. The chart is worth promoting in more regions of China but should be tested prudently before use.

Objective To evaluate the clinical value of the chemiluminescence immunoassay particles (CMIA)in the diagnosis of syphilis.Methods The serum specimens from 150 cases of syphilis in our hospital were selected as the observation group and con-temporaneous 150 serum samples from non-syphilis healthy people were selected as the control group.The toluidine red unheated serum test (TRUST),treponema pallidum particle agglutination test (TPPA)and CMIA were adopted to conduct the detection. The sensitivity,accuracy and specificity of the three kinds of method were calculated and their differences were compared and ana-lyzed.Results The sensitivity of TRUST and TPPA and CMIA was 65.3%,97.7% and 99.3% respectively,the specificity was 74.7%,97.3% and 100.0% respectively,the accuracy was 70.0%,97.0% and 99.7% respectively,the difference among three kinds of methods had statistical significance (P <0.05).The sensitivity,specificity and accuracy of TRUST were lower than those of CMIA and TPPA (P <0.017),there was no statistically significant difference between CMIA and TPPA (P >0.017).Conclu-sion CMIA is equivalent to TPPA in the sensitivity,specificity and accuracy,is superior to TRUST,and has the advantages of sim-ple operation,objective results and good repeatability.

Objective To analyze self-efficiency, coping style and mental health of the shipboard naval personnel of a certain unit and their relationship.Methods A general psychological survey was made on 706 shipboard naval personnel of a certain unit by using Self-Efficacy Scale, Coping Style and Symptom Checklist 90 assessment battery.Results A total of 692 copies of questionnaires were retrieved, with an efficiency rate of 98.02％.(1) Statistical significance could be noted, when various factors of SCL-90 in the shipboard naval personnel were compared with those of the norm of Chinese servicemen (P ＜ 0.01).Generally, their mental health status was quite good.(2)Self-efficacy of the shipboard naval personnel was on the whole high and in most cases, they adopted active coping styles.The shipboard naval personnel with different posts, different educational background and different marital status responded quite differently to coping styles.(3) Self-efficacy was negatively correlated with various factors of SCL-90 significantly except somatization(P ＜ 0.05 or P ＜ 0.01).Obviously, immature coping and mixed type coping were positively correlated with various factors of SCL-90 (P ＜ 0.05 or P ＜ 0.01).Mature coping had significantly negative correlation only with interpersonal sensitivity and anxiety in SCL-90 (P ＜ 0.05 or P ＜ 0.01).(4) Different posts, different educational background and self-efficacy had positive predictive effect on mental health (P ＜0.05 or P ＜ 0.01), while immature coping and mixed type had significantly negative predictive effect on mental health (P ＜ 0.05 or P ＜ 0.01).Conclusions The shipboard naval personnel of a certain unit had relatively high self-efficacy.In most cases, they adopted a more active coping style and their mental health was good.Self-efficacy and coping style were closely associated with mental health.

Objective To analyze self-efficiency, coping style and mental health of the shipboard naval personnel of a certain unit and their relationship.Methods A general psychological survey was made on 706 shipboard naval personnel of a certain unit by using Self-Efficacy Scale, Coping Style and Symptom Checklist 90 assessment battery.Results A total of 692 copies of questionnaires were retrieved, with an efficiency rate of 98.02％.(1) Statistical significance could be noted, when various factors of SCL-90 in the shipboard naval personnel were compared with those of the norm of Chinese servicemen (P ＜ 0.01).Generally, their mental health status was quite good.(2)Self-efficacy of the shipboard naval personnel was on the whole high and in most cases, they adopted active coping styles.The shipboard naval personnel with different posts, different educational background and different marital status responded quite differently to coping styles.(3) Self-efficacy was negatively correlated with various factors of SCL-90 significantly except somatization(P ＜ 0.05 or P ＜ 0.01).Obviously, immature coping and mixed type coping were positively correlated with various factors of SCL-90 (P ＜ 0.05 or P ＜ 0.01).Mature coping had significantly negative correlation only with interpersonal sensitivity and anxiety in SCL-90 (P ＜ 0.05 or P ＜ 0.01).(4) Different posts, different educational background and self-efficacy had positive predictive effect on mental health (P ＜0.05 or P ＜ 0.01), while immature coping and mixed type had significantly negative predictive effect on mental health (P ＜ 0.05 or P ＜ 0.01).Conclusions The shipboard naval personnel of a certain unit had relatively high self-efficacy.In most cases, they adopted a more active coping style and their mental health was good.Self-efficacy and coping style were closely associated with mental health.

目的调查特勤疗养人员社会适应的特点。方法以症状自评量表（SCL-90）中与社会适应有关的3个因子（人际关系、敌对、偏执）对558名特勤疗养人员进行测评。结果特勤疗养人员3个因子有阳性症状的百分比为人际关系7.2%、敌对9.3%、偏执6.5%；特勤疗养员的得分明显低于军人常模和地方常模（P<0.01）；海勤疗养员在人际关系、敌对因子上明显高于空勤疗养员（P<0.01），偏执因子无显著性差异（P>0.05）。结论特勤疗养员的社会适应状况良好。

Objective To develop a scale of social adaptation degrees of special service personnel (referred to as scale) applying Traditional Chinese Medicine and psychological theory and to assess its reliability and validity. Methods By literature review, job analysis, inventory survey, topics interview, this scale was determined in dimensions, items and items pool based on theoretical model. Results After specialist important analysis and combining the different results of statistical analysis, including Cronbach's α coefficient, resolution factor, correlation analysis and confirmatory factor analysis, 6 dimensions, 14 factors and 40 items were finally kept in the scale. The dimensions were psychological characteristics, physical condition, intelligence level, interpersonal relationships, environmental factors and moral character. The factors were self-control, self-esteem character bias, self-confidence, physiological function, learning intelligence, creating intelligence, leadership intelligence, gregariousness, cooperative, confidence feeling, natural environment, social environment and moral character. Conclusion This scale was made on the basis of general international principle, it had good reliability and validity meeting measurement standard of traditional Chinese medicine and psychological theory, and it is an effective and practical evaluation tool of social adaptation degrees of special service personnel.