BACKGROUND: Based on the China-VHD database, this study sought to develop and validate a Valvular Heart Disease- specific Age-adjusted Comorbidity Index (VHD-ACI) for predicting mortality risk in patients with VHD. METHODS & RESULTS: The China-VHD study was a nationwide, multi-centre multi-centre cohort study enrolling 13,917 patients with moderate or severe VHD across 46 medical centres in China between April-June 2018. After excluding cases with missing key variables, 11,459 patients were retained for final analysis. The primary endpoint was 2-year all-cause mortality, with 941 deaths (10.0%) observed during follow-up. The VHD-ACI was derived after identifying 13 independent mortality predictors: cardiomyopathy, myocardial infarction, chronic obstructive pulmonary disease, pulmonary artery hypertension, low body weight, anaemia, hypoalbuminaemia, renal insufficiency, moderate/severe hepatic dysfunction, heart failure, cancer, NYHA functional class and age. The index exhibited good discrimination (AUC, 0.79) and calibration (Brier score, 0.062) in the total cohort, outperforming both EuroSCORE II and ACCI (P < 0.001 for comparison). Internal validation through 100 bootstrap iterations yielded a C statistic of 0.694 (95% CI: 0.665-0.723) for 2-year mortality prediction. VHD-ACI scores, as a continuous variable (VHD-ACI score: adjusted HR (95% CI): 1.263 (1.245-1.282), P < 0.001) or categorized using thresholds determined by the Yoden index (VHD-ACI ≥ 9 vs. < 9, adjusted HR (95% CI): 6.216 (5.378-7.184), P < 0.001), were independently associated with mortality. The prognostic performance remained consistent across all VHD subtypes (aortic stenosis, aortic regurgitation, mitral stenosis, mitral regurgitation, tricuspid valve disease, mixed aortic/mitral valve disease and multiple VHD), and clinical subgroups stratified by therapeutic strategy, LVEF status (preserved vs. reduced), disease severity and etiology. CONCLUSION The VHD-ACI is a simple 13-comorbidity algorithm for the prediction of mortality in VHD patients and providing a simple and rapid tool for risk stratification.

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Objective:To investigate the impact of the interval period between biopsy and MR examination on tumor detection and extraprostatic extension (EPE) assessment for prostate cancer (PCa) using multi-parametric MRI (mpMRI).Methods:The study was cross-sectional and retrospectively included 130 patients with PCa who underwent RP and preoperative systematic biopsies followed by mpMRI between January 2021 and December 2022 in the First Medical Center of Chinese PLA General Hospital. Patients were divided into 3 groups according to interval following biopsy (group A,<3 weeks, 31 cases; group B, 3-6 weeks, 67 cases; group C,>6 weeks, 32 cases). The percentages of hemorrhage volume in the total prostate were drawn on T 1WI and calculated. The junior, senior and expert radiologists independently localized the index lesions and calculated the accuracy for tumor detection, in addition to assessing the probabilities of EPE according to EPE grade. The correlation between the hemorrhage extent and interval was analyzed using the Spearman correlation coefficient. The accuracy for tumor detection was compared using χ2 test among groups. The diagnostic performance of the radiologists for EPE prediction was assessed using the receiver operating characteristic curve, and the differences between the corresponding area under the curve (AUC) were compared using the DeLong test. Results:The percentage of hemorrhage was correlated with the interval between biopsy and MR examination ( r=-0.325, P<0.001). The detection accuracy of junior radiologist was 83.9% (26/31), 76.1% (51/67), and 78.1% (25/32) in group A, B and C, respectively; no differences were observed in the detection accuracy among three groups ( χ2=0.76, P=0.685). The detection accuracy of senior radiologist was 83.9% (26/31), 80.6% (54/67), and 71.9% (23/32) in 3 groups with no differences ( χ2=1.53, P=0.464). The detection accuracy of expert radiologist was 80.6% (25/31), 77.6% (52/67), and 93.8% (30/32) with no differences ( χ2=3.95, P=0.139). The AUC (95% CI) for predicting EPE were 0.830 (0.652-0.940), 0.704 (0.580-0.809), 0.800 (0.621-0.920) in the group A, B and C for junior radiologist; 0.876 (0.708-0.966), 0.768 (0.659-0.863), 0.896 (0.736-0.975) for senior radiologist; and 0.866 (0.695-0.961), 0.813 (0.699-0.895), 0.852 (0.682-0.952) for expert radiologist, respectively. No differences were observed among the subgroups in each radiologist ( P>0.05). Conclusion:The interval period does not significantly affect the detection accuracy and EPE assessment of PCa using mpMRI. There is probably no necessity for prolonged intervals following systematic biopsy to preserve the clarity of MRI interpretation for PCa.

Objectives:To investigate the feasibility of using bedside echocardiography on the evaluation of potential donors with different causes of brain death for adult heart transplantation. Methods:Bedside echocardiographic and clinical data of consecutive potential donors for adult heart transplantation evaluated by the team of our institution from February 2018 to December 2020 were retrospectively analyzed.Based on different causes of brain death,the potential donors were divided into stroke(ischemic or hemorrhagic,n=398)and non-stroke(head trauma,brain tumor,anoxia,n=272)groups.The clinical and echocardiographic features were compared between the two groups.A total of 350 donors were assigned to our hospital by the China Organ Transplant Response System and met the inclusion criteria for donor selection.There were 195 cases in the stroke group and 155 in the non-stroke group.Retrieval operations were performed and the retrieval rate of hearts for transplantation in stroke donors was compared to that in non-stroke donors. Results:(1)Among the 670 potential heart donors,compared with the non-stroke group,donors in the stroke group were significantly older,had higher body mass index,larger left ventricular end-diastolic diameter,thicker interventricular septum,higher rates of echocardiographic abnormalities,higher prevalence of hypertension(all P<0.001).Among the 670 potential heart donors,17.5%(117 cases)did not meet the echo selection criteria,the common causes were left ventricular hypertrophy(59 cases,50.4%),left ventricular ejection fraction<50%(27 cases,23.1%),wall motion abnormalities(21 cases,17.9%),and left ventricular dilation(14 cases,12.0%).(2)Among the 350 donors who had met the selection criteria and assigned to our hospital by the China Organ Transplant Response System and underwent retrieval operation,70.3%(246 cases)were successfully procured,110 cases(44.7%)in the stroke group and 136 cases(55.3%)in the non-stroke group.The retrieval rate of stroke donors(110/195,56.4%)was lower compared with that of non-stroke(136/155,87.7%,P<0.001),104 cases(29.7%)were not retrieved,and the leading cause of unsuccessful organ retrieval was the occlusion of at least one major coronary artery(91 cases,87.5%). Conclusions:Bedside echocardiography is of great value as a screening tool for cardiac donors.Cardiac structures of the potential donor with stroke as the cause of brain death were different from those with non-stroke causes.The retrieval rate of stroke donors was lower than that of non-stroke donors,even if the initial criteria for donor selection were fulfilled.

Objective To analyze the causal relationship between genetically predicted body mass index(BMI)and prostate cancer(PCa)risk with Mendelian randomization(MR),in order to explore the potential risk factors for PCa and the development of prevention strategies.Methods Two-sample MR was performed using BMI genome-wide association study(GWAS)data of 339 224 samples and PCa GWAS data of 463 010 samples.After that,69 single nucleotide polymorphisms(SNP)of BMI were used as instrumental variables to perform MR analysis on PCa.MR analysis adopted the inverse variance weighting method(IVW),MR-Egger method,weighted median method(WME),simple mode method(SM)and weighted mode method(WM).Heterogeneity test,plciotropy test and leave-one-out sensitivity test were used to verify the stability and reliability of the data.Results In the IVW analysis,it was found that BMI was associated with the risk of PCa(OR:0.997,95％CI:0.995-0.999,P=0.001).In the WME(OR:0.996,95％CI:0.994-0.999,P=0.009),and WM(OR:0.995,95％CI:0.991-1.000,P=0.045),the same results were obtained.There was no statistical significant difference between the MR-Egger method(OR:0.996,95％CI:0.991-1.002,P=0.205)and SM(OR:0.995,95％CI:0.990-1.000,P=0.079).Conclusion There is a causal relationship between a genetically predicted higher BMI and a lower risk of PCa by two sample MR analysis.This finding can prove a reference for identifying potential risk factors for PCa and the development of prevention strategies.

OBJECTIVE: To explore clinical efficacy of unilateral and bilateral nail-rod system fixation in single-level intervertebral fusion fixation of lumbar disc herniation (LDH) and instability with unilateral dual-channel spinal endoscopy. METHODS: The clinical data of 63 patients with LDH complicated with instability treated by unilateral double-channel spinal endoscopy from March 2021 to June 2022 were retrospectively analyzed. According to intraoperative fixation methods, the patients were divided into two groups, included unilateral nail rod system fixation group(unilateral group) and bilateral nail rod system fixation group(bilateral group). There were 31 patients in unilateral group, including 15 males and 16 females; aged from 40 to 67 years old with an average of (54.65±7.32) years old; 3 patients with L_3,4, 15 patients with L_4,5, 13 patients with L₅S₁. There were 32 patients in bilateral group, including 18 males and 14 females, aged from 43 to 68 years old with an average of (56.19±6.63) years old;4 patients with L_3,4, 17 patients with L_4,5, 11 patients with L₅S₁. The time of operation, length of incision, operation time, length of hospital stay, cost of treatment, occurrence of complications and adverse events were recorded and compared between two groups. Visual analogue scale (VAS) of lumbar and leg pain, Japanese Orthopaedic Association (JOA) and Oswestry disability index (ODI) were compared before operation, 3 and 12 months after operation. MacNab standard was used to evaluate clinical effect. RESULTS: Both of two groups were successfully completed operation and followed up. In unilateral fixation group, follow-up time, operation time, incision length, postoperative ambulation time, hospital stay and treatment cost were (11.81±1.08) months, (122.48±13.86) min, (3.15±0.45) cm, (3.06±0.73) d, (6.87±1.09) d, and (3.49±0.09) ten thousand yuan;while (11.47±1.16) months, (134.94±10.94) min, (6.45±0.83) cm, (3.19±0.86) d, (7.03±1.03) d, (3.77±0.12) ten thousand yuan in bilateral fixation group, respectively;there were significant differences in operation time, incision length and treatment cost between two groups (P<0.05), no significant difference in follow-up time, postoperative ambulation time and hospital stay (P>0.05). There were no significant difference in VAS of low back pain, JOA score, ODI and MacNab grade between two groups before and after operation (P>0.05). No significant complications and adverse events were observed between two groups after operation. CONCLUSION Both of unilateral and bilateral nail rod system for the treatment of LDH with instability could achieve the expected results. Unilateral fixation has more advantageous than bilateral fixation in terms of operation time, incision length and treatment cost. For patients with osteoporosis before operation or insufficient fixation strength of unilateral pedicle nails during surgery, bilateral fixation is feasible to enhance reliability of fixation.
Humans ; Male ; Female ; Middle Aged ; Spinal Fusion/methods* ; Endoscopy/methods* ; Aged ; Adult ; Intervertebral Disc Displacement/surgery* ; Lumbar Vertebrae/surgery* ; Retrospective Studies

To investigate the factors affecting the sperm retrieval rate of microdissection testicular sperm extraction (micro-TESE) in patients with nonmosaic Klinefelter syndrome (KS), 64 patients with nonmosaic KS who underwent micro-TESE in the Center for Reproductive Medicine of Peking University Third Hospital (Beijing, China) between January 2016 and December 2017 were included in the study. Data on medical history, physical examination and laboratory examination results, and micro-TESE outcomes were collected. Patients were divided into two groups according to micro-TESE outcomes. The following factors were compared between the two groups by the Mann‒Whitney U test or Student's t-test based on the distribution (nonnormal or normal) of the factors: age, testicular size, follicle-stimulating hormone level, luteinizing hormone level, testosterone level, and anti-Müllerian hormone level. The overall success rate of sperm retrieval was 50.0%. Correlation analysis showed that testicular volume was positively correlated with testosterone level. Using a logistic regression model, age and anti-Müllerian hormone levels were found to be better predictors for the sperm retrieval rate than the other parameters.
Humans ; Male ; Sperm Retrieval ; Klinefelter Syndrome ; Microdissection ; Anti-Mullerian Hormone ; Semen ; Testis ; Spermatozoa ; Testosterone ; Azoospermia ; Retrospective Studies

OBJECTIVE: To develop and validate a user-friendly risk score for older mitral regurgitation (MR) patients, referred to as the Elder-MR score. METHODS: The China Senile Valvular Heart Disease (China-DVD) Cohort Study functioned as the development cohort, while the China Valvular Heart Disease (China-VHD) Study was employed for external validation. We included patients aged 60 years and above receiving medical treatment for moderate or severe MR (2274 patients in the development cohort and 1929 patients in the validation cohort). Candidate predictors were chosen using Cox's proportional hazards model and stepwise selection with Akaike's information criterion. RESULTS: Eight predictors were identified: age ≥ 75 years, body mass index < 20 kg/m², NYHA class III/IV, secondary MR, anemia, estimated glomerular filtration rate < 60 mL/min per 1.73 m², albumin < 35 g/L, and left ventricular ejection fraction < 60%. The model displayed satisfactory performance in predicting one-year mortality in both the development cohort (C-statistic = 0.73, 95% CI: 0.69-0.77, Brier score = 0.06) and the validation cohort (C-statistic = 0.73, 95% CI: 0.68-0.78, Brier score = 0.06). The Elder-MR score ranges from 0 to 15 points. At a one-year follow-up, each point increase in the Elder-MR score represents a 1.27-fold risk of death (HR = 1.27, 95% CI: 1.21-1.34, P < 0.001) in the development cohort and a 1.24-fold risk of death (HR = 1.24, 95% CI: 1.17-1.30, P < 0.001) in the validation cohort. Compared to EuroSCORE II, the Elder-MR score demonstrated superior predictive accuracy for one-year mortality in the validation cohort (C-statistic = 0.71 vs. 0.70, net reclassification improvement = 0.320, P < 0.01; integrated discrimination improvement = 0.029, P < 0.01). CONCLUSIONS The Elder-MR score may serve as an effective risk stratification tool to assist clinical decision-making in older MR patients.

The vagina contains at least a billion microbial cells,dominated by lactobacilli.Here we perform metagenomic shotgun sequencing on cervical and fecal samples from a cohort of 516 Chinese women of reproductive age,as well as cervical,fecal,and salivary samples from a second cohort of 632 women.Factors such as pregnancy history,delivery history,cesarean section,and breastfeeding were all more important than menstrual cycle in shaping the microbiome,and such information would be necessary before trying to interpret differences between vagino-cervical micro-biome data.Greater proportion of Bifidobacterium breve was seen with older age at sexual debut.The relative abundance of lactobacilli especially Lactobacillus crispatus was negatively associated with pregnancy history.Potential markers for lack of menstrual regularity,heavy flow,dysmenor-rhea,and contraceptives were also identified.Lactobacilli were rare during breastfeeding or post-menopause.Other features such as mood fluctuations and facial speckles could potentially be predicted from the vagino-cervical microbiome.Gut and salivary microbiomes,plasma vitamins,metals,amino acids,and hormones showed associations with the vagino-cervical microbiome.Our results offer an unprecedented glimpse into the microbiota of the female reproductive tract and call for international collaborations to better understand its long-term health impact other than in the settings of infection or pre-term birth.

Gut microbiota is a bridge between the metabolism and health state of the host,which plays a very important role in maintaining homeostasis. Natural polysaccharides,widely existed in nature,are a kind of biological macromolecules with prebiotics effects,which can improve a degree of physiological status by selectively changing the gut microbiota structure and function,enhancing the content of short chain fatty acids(SCFAs)and decreasing the level of inflammatory cytokines. In addition,the majority of polysaccharides can be degraded by gut microbiota to enhance their bioavailability and to promote the health state of the host. In this paper we discuss the interaction among polysaccharides and gut microbiotanatural,degradation mechanism and review gut microbiota as a target in the treatment of metabolic diseases,so as to provide future prospects of natural polysaccharides as " prebiotics " functional factors in the field of biological medicine and health products.