Objective: To analyze the change trends in the body shape indicators and proportions of students in Harbin from 2010 to 2024, and to investigate ergonomic compatibility of functional dimensions of school desks and chairs with current student shape indicators, so as to provide a reference for revising furniture standards of desks and chairs. Methods: Between September and November of both 2010 and 2024, a combination of convenience sampling and stratified cluster random sampling was conducted across three districts in Harbin, yielding samples of 6 590 and 6 252 students, respectively. Anthropometric shape indicators cluding height, sitting height, crus length, and thigh length-and their proportional changes were compared over the 15-year period. The 2024 data were compared with current standard functional dimensions of school furniture. The statistical analysis incorporated t-test and Mann-Whitney U- test. Results: From 2010 to 2024, average height increased by 1.8 cm for boys and 1.5 cm for girls; sitting height increased by 1.5 cm for both genders; crus length increased by 0.3 cm for boys and 0.4 cm for girls; and thigh length increased by 0.5 cm for both genders. The ratios of sitting height to height, and sitting height to leg length increased by less than 0.1 . The difference between desk chair height and 1/3 sitting height ranged from 0.4-0.8 cm. Among students matched with size 0 desks and chairs, 22.0% had a desk to chair height difference less than 0, indicating that the desk to chair height difference might be insufficient for taller students. The differences between seat height and fibular height ranged from -1.4 to 1.1 cm; and the differences between seat depth and buttock popliteal length ranged from -9.8 to 3.4 cm. Among obese students, the differences between seat width and 1/2 hip circumference ranged from -20.5 to -8.7 cm, while it ranged from -12.2 to -3.8 cm among non obese students. Conclusion Current furniture standards basically satisfy hygienic requirements; however, in the case of exceptionally tall and obese students, ergonomic accommodations such as adaptive seating allocation or personalized adjustments are recommended to meet hygienic requirements.

Humans ; Aminoquinolines/therapeutic use* ; Carcinoma, Non-Small-Cell Lung/genetics* ; Lung Neoplasms/genetics* ; Mutation/genetics* ; Standard of Care

Objective:To develop a risk prediction model for the recurrence of diabetic foot ulcer (DFU) in diabetic patients and primarily validate its predictive value.Methods:Meta-analysis combined with retrospective cohort study was conducted. The Chinese and English papers on risk factors related to DFU recurrence publicly published in China Biology Medicine disc, China National Knowledge Infrastructure, Wanfang Database, VIP Database, and PubMed, Embase, Cochrane Library, and Web of Science, and the search time was from the establishment date of each database until March 31 st, 2022. The papers were screened and evaluated, the data were extracted, a meta-analysis was performed using RevMan 5.4.1 statistical software to screen risk factors for DFU recurrence, and Egger's linear regression was used to assess the publication bias of the study results. Risk factors for DFU recurrence mentioned in ≥3 studies and with statistically significant differences in the meta-analysis were selected as the independent variables to develop a logistic regression model for risk prediction of DFU recurrence. The medical records of 101 patients with DFU who met the inclusion criteria and were admitted to Affiliated Hospital of Guizhou Medical University from January 2019 to June 2022 were collected. There were 69 males and 32 females, aged (63±14) years. The receiver operating characteristic (ROC) curve of the predictive performance of the above constructed predictive model for DFU recurrence was drawn, and the area under the ROC curve, maximum Youden index, and sensitivity and specificity at the point were calculated. Dataset including data of 8 risk factors for DFU recurrence and the DFU recurrence rates of 10 000 cases was simulated using RStudio software and a scatter plot was drawn to determine two probabilities for risk division of DFU recurrence. Using the β coefficients corresponding to 8 DFU recurrence risk factors ×10 and taking the integer as the score of coefficient weight of each risk factor, the total score was obtained by summing up, and the cutoff scores for risk level division were calculated based on the total score × two probabilities for risk division of DFU recurrence. Results:Finally, 20 papers were included, including 3 case-control studies and 17 cohort studies, with a total of 4 238 cases and DFU recurrence rate of 22.7% to 71.2%. Meta-analysis showed that glycosylated hemoglobin >7.5% and with plantar ulcer, diabetic peripheral neuropathy, diabetic peripheral vascular disease, smoking, osteomyelitis, history of amputation/toe amputation, and multidrug-resistant bacterial infection were risk factors for the recurrence of DFU (with odds ratios of 3.27, 3.66, 4.05, 3.94, 1.98, 7.17, 11.96, 3.61, 95% confidence intervals of 2.79-3.84, 2.06-6.50, 2.50-6.58, 2.65-5.84, 1.65-2.38, 2.29-22.47, 4.60-31.14, 3.13-4.17, respectively, P<0.05). There were no statistically significant differences in publication biases of diabetic peripheral neuropathy, diabetic peripheral vascular disease, glycosylated hemoglobin >7.5%, plantar ulcer, smoking, multidrug-resistant bacterial infection, or osteomyelitis ( P>0.05), but there was a statistically significant difference in the publication bias of amputation/toe amputation ( t=-30.39, P<0.05). The area under the ROC curve of the predictive model was 0.81 (with 95% confidence interval of 0.71-0.91) and the maximum Youden index was 0.59, at which the sensitivity was 72% and the specificity was 86%. Ultimately, 29.0% and 44.8% were identified respectively as the cutoff for dividing the probability of low risk and medium risk, and medium risk and high risk for DFU recurrence, while the corresponding total scores of low, medium, and high risks of DFU recurrence were <37, 37-57, and 58-118, respectively. Conclusions:Eight risk factors for DFU recurrence are screened through meta-analysis and the risk prediction model for DFU recurrence is developed, which has moderate predictive accuracy and can provide guidance for healthcare workers to take interventions for patient with DFU recurrence risk.

Objective To explore the effect and mechanism of miR-581 on the autophagy of ovarian cancer SKOV3 cells. Methods miR-581 mimics and miR-581 NC were transfected into SKOV3 cells, and the transfection efficiency was detected by qRT-PCR. After successful transfection, Western blot was used to detect autophagy-related proteins expression in SKOV3 cells. TargetScanHuman database predicted miR-581 target genes, and Western blot verified the role of miR-581 and target genes. Results Overexpression of miR-581 significantly inhibited the expression of autophagy-related proteins LC3 Ⅱ and Beclin1 (P < 0.01); miR-581 negatively regulated FOXO1 expression (P < 0.01) and FOXO1 promoted autophagy of SKOV3 cells (P < 0.01). Conclusion miR-581 affects the autophagy of ovarian cancer SKOV3 cells by regulating the expression of FOXO1.

OBJECTIVE: To assess the value of non-invasive prenatal testing (NIPT) for the detection of fetal chromosomal aneuploidies in women with twin pregnancy. METHODS: A total of 2473 women with twin pregnancy underwent the NIPT test to assess the risk for fetal chromosomal aneuploidies from January 2016 to September 2019. Those with a high risk by NIPT were confirmed by amniocentesis or chorionic villus sampling. All cases were followed up to evaluate the positive prediction value of NIPT for twin pregnancies. RESULTS: Among the 2473 women, the NIPT test has identified 31 cases (1.25%) with a high risk for fetal chromosomal aneuploidies, which included 5 cases of trisomy 21, 1 case of chromosome 21 deletion, 4 cases of trisomy 18, 7 cases of sex chromosome abnormality and 14 cases of microdeletion and microduplication. By invasive prenatal diagnosis or chromosomal karyotyping analysis of neonates, 5 cases of trisomy 21, 3 cases of trisomy 18, 1 case of sex chromosome abnormality, and 2 cases of microdeletion and microduplication were confirmed, which yielded a positive predictive value of 100%, 75%, 25% and 25%, respectively. CONCLUSION NIPT can be used for the screening of fetal chromosomal aneuploidies in women with twin pregnancy with high accuracy. The method is non-invasive, safe and effective for the screening of fetal chromosomal aneuploidies, in particular trisomy 21.
Aneuploidy ; Chromosome Disorders ; Female ; Humans ; Infant, Newborn ; Pregnancy ; Pregnancy, Twin ; Prenatal Diagnosis ; Trisomy ; Trisomy 13 Syndrome ; Trisomy 18 Syndrome

OBJECTIVE: To explore whether it is necessary to choose NIPT-plus for the prenatal screening of pregnant women. METHODS: The results of NIPT and NIPT-plus sequencing data, fetal DNA concentration, prenatal diagnosis and pregnancy outcome of 50 pregnant women were compared. RESULTS: Compared with NIPT, NIPT-plus attained similar fetal DNA concentration and a 4.4-fold increase in sequencing data. NIPT was able to detect 4 cases of 21-trisomy, 2 cases of 18-trisomy, and 9 cases of sex chromosome aneuploidies (SCAs) signaled by NIPT-plus, but missed one 18-trisomy, and failed to detect rare chromosome aneuploidies (RCAs) and microdeletion/microduplication syndromes (MMS). The PPVs of NIPT-plus for 21-trisomy, 18-trisomy, SCAs, MMS and RCAs were 100%, 100%, 44.4%, 30.4% and 0%, respectively. And those of NIPT for 21-trisomy, 18-trisomy, and SCAs were 100%, 100%, and 44.4%, respectively. CONCLUSION It is necessary for pregnant women to select NIPT-plus to improve the detection rate of common trisomies, SCAs and disease-specific MMS, therefore reduce the occurrene of birth defect.
Aneuploidy ; Female ; Humans ; Pregnancy ; Pregnant Women ; Prenatal Diagnosis ; Trisomy ; Trisomy 13 Syndrome ; Trisomy 18 Syndrome

OBJECTIVE: To explore the clinical effect of expanded non-invasive prenatal testing (NIPT-plus) for prenatal screening. METHODS: The screening result, prenatal diagnosis and pregnancy outcome of 3700 pregnant women who volunteered NIPT-plus screening at our center from September 2018 to December 2019 were reviewed. RESULTS: Among the 3700 pregnant women, 74(2.0%) were scored positive for clinically significant fetal chromosomal abnormalities and underwent NIPT-plus screening. Sixty three women with a high risk underwent invasive prenatal diagnosis, among whom 19 were diagnosed, which yielded a positive predictive value (PPVs) of 30.2% (19/63). Statistical analysis showed that NIPT-plus has higher PPVs for common aneuploidies and low-to-medium PPVs for sex chromosome aneuploidies and microdeletion/microduplication syndromes. CONCLUSION As a screening technique, NIPT-plus has broader applications compared with conventional techniques, and has reference value for clinicians and pregnant women during pregnancy.
Aneuploidy ; Chromosome Aberrations ; Female ; Humans ; Pregnancy ; Pregnancy Outcome ; Prenatal Diagnosis ; Sex Chromosome Aberrations

Objective:To analyze the antimicrobial resistance characteristics of 538 Neisseria meningitidis isolated from 2005 to 2019 in China. Method:Total of 538 Neisseria meningitidis strains collected from 30 provinces in China from 2005 to 2019. Antimicrobial susceptibility test were performed based on the standards of clinical and laboratory standardization association (CLSI) including 11 recommended antibiotics. Gradient diffusion method was used to detect the antibiotic sensitivity of Neisseria meningitidis. Results:All 538 strains were sensitive to azithromycin, meropenem, chloramphenicol, rifampicin and ceftriaxone. As to other six antibiotics, the antibiotics sensitivity rates were cefotaxime (97.4%, 524 strains), ampicillin (87.7%, 472 strains), penicillin (84.8%, 456 strains), minocycline (95.2%, 512 strains), ciprofloxacin (24.9%, 134 strains) and trimethoprim/sulfamethoxazole (11.2%, 60 strains) respectively.Conclusions:Neisseria meningitidis isolated from 2005-2019 in China were all sensitive to azithromycin, meropenem, chloramphenicol, rifampicin and ceftriaxone. It should highlight Neisseria meningitidis resistant to cefotaxime, ampicillin and penicillin. Ciprofloxacin and sulfamethoxazole are not recommended as the priority choice for clinical treatment and prophylactic medication.

Objective:To analyze the antimicrobial resistance characteristics of 538 Neisseria meningitidis isolated from 2005 to 2019 in China. Method:Total of 538 Neisseria meningitidis strains collected from 30 provinces in China from 2005 to 2019. Antimicrobial susceptibility test were performed based on the standards of clinical and laboratory standardization association (CLSI) including 11 recommended antibiotics. Gradient diffusion method was used to detect the antibiotic sensitivity of Neisseria meningitidis. Results:All 538 strains were sensitive to azithromycin, meropenem, chloramphenicol, rifampicin and ceftriaxone. As to other six antibiotics, the antibiotics sensitivity rates were cefotaxime (97.4%, 524 strains), ampicillin (87.7%, 472 strains), penicillin (84.8%, 456 strains), minocycline (95.2%, 512 strains), ciprofloxacin (24.9%, 134 strains) and trimethoprim/sulfamethoxazole (11.2%, 60 strains) respectively.Conclusions:Neisseria meningitidis isolated from 2005-2019 in China were all sensitive to azithromycin, meropenem, chloramphenicol, rifampicin and ceftriaxone. It should highlight Neisseria meningitidis resistant to cefotaxime, ampicillin and penicillin. Ciprofloxacin and sulfamethoxazole are not recommended as the priority choice for clinical treatment and prophylactic medication.

Objective:To investigate the value of nomogram predictive model established by the risk factors of upper extremity venous thrombosis risk associated with peripherally venous inserted central catheter (PICC) in cancer patients.Methods:A total of 1 032 patients who underwent PICC insertion between January 2016 and March 2017 in Zhejiang Cancer Hospital were selected by using prospective cohort study and convenience sampling. Risk factors of upper extremity venous thrombosis risk associated with PICC in cancer patients were evaluated by using Cox regression model. The nomogram predictive model of upper extremity venous thrombosis risk associated with PICC insertion was constructed. Bootstrap method was used to complete the inside check, and figure calibration was used to verify the nomogram.Results:A multivariate Cox regression analysis showed that trombosis history ( HR = 27.82, 95% CI 8.17-94.88, P < 0.01) and hyperlipidemia ( HR = 3.01, 95% CI 1.31-6.93, P = 0.009) were independent risk factors for upper extremity venous thrombosis associated with PICC. The nomogram model C-index was 0.71 (95% CI 0.63-0.80) based on the above risk factors, which indicated that the nomogram had a good differentiation. The calibration curve for predicting the probability of upper extremity venous thrombosis risk associated with PICC within one week, two weeks and one month deviated slightly from the standard curve, suggesting that the model might overestimate the risk of upper extremity venous thrombosis associated with PICC in cancer patients. Conclusions:The nomogram model has a good predictive value and strong operability, which can be used to predict the probability of upper extremity venous thrombosis associated with PICC in cancer patients after PICC insertion. It can provide a reference for identifying the high-risk cancer patients and formulating proper therapeutic strategies.