1.Value of C-reactive protein in predicting the progression of acute decompensation of cirrhosis to acute-on-chronic liver failure
Feng YANG ; Jun GUO ; Jiale SHEN ; Ruiqi LI ; Xixuan WANG ; Yongfeng YANG
Journal of Clinical Hepatology 2026;42(7):1623-1631
ObjectiveTo investigate the efficacy of C-reactive protein (CRP) in predicting the progression to acute-on-chronic liver failure (ACLF) within 90 days after disease onset in patients with acute decompensation (AD) of cirrhosis, and to provide a reference for the early identification of high-risk populations in clinical practice. MethodsA retrospective study was conducted among 906 patients with liver cirrhosis who were hospitalized due to AD in Nanjing Second Hospital from January 1, 2015 to October 31, 2024, and demographic features, AD type, and laboratory markers were collected on admission. The primary endpoint was progression to ACLF within 90 days after admission, and according to the presence or absence of ACLF, the patients were divided into non-ACLF group with 676 patients and ACLF group with 230 patients. The independent-samples t test was used for comparison of normally distributed continuous data between groups, and the Wilcoxon rank-sum test was used for comparison of non-normally distributed continuous data between groups; the chi-square test or the Fisher’s exact test was used for comparison of categorical data between groups. The univariate and multivariate Cox proportional-hazards regression models were used to identify independent predictive factors for ACLF. The receiver operating characteristic (ROC) curve was used to assess the predictive performance of CRP and existing scoring systems (Model for End-Stage Liver Disease [MELD], Child-Turcotte-Pugh [CTP] score, and Chronic Liver Failure Consortium Acute Decompensation [CLIF-C AD] score), and the restricted cubic spline analysis was used to investigate the nonlinear relationship between CRP and the risk of ACLF. Youden index was used to determine the optimal predictive cut-off value for CRP, and the Kaplan-Meier survival curve was plotted for risk stratification, while the log-rank test was used for survival analysis. ResultsAmong the 906 AD patients, the incidence rate of ACLF was 25.39% within 90 days. The incidence rate of ACLF within 90 days was 45.1% in the 264 patients with bacterial infection and 17.3% in the 642 patients without bacterial infection (χ²=74.791, P<0.001). Among the 906 patients, 312 patients (34.44%) had acute-on-chronic pre-liver failure (pre-ACLF), with a significantly higher proportion of patients who progressed to ACLF than those in the non-pre-ACLF group [60.58% (189/312) vs 6.90% (41/594), χ²=310.234, P<0.001]. Among the 230 patients with ACLF, there were 102 patients with stable ACLF (44.35%) and 128 patients with unstable ACLF (55.65%), with a significant difference in CRP between the two groups of patients (U=5 234.500, P<0.001). The restricted cubic spline analysis showed a significant nonlinear relationship between CRP and the risk of ACLF (P<0.001). The optimal cut-off value of CRP was determined as 10.16 mg/L based on the Youden index, with a sensitivity of 70.4% and a specificity of 64.5%. The Kaplan-Meier curve analysis showed that the high-risk group with CRP≥10.16 mg/L had a significantly higher event-free survival rate of ACLF within 90 days compared with the low-risk group (P<0.001). The multivariate Cox regression analysis showed that AD type-hepatic encephalopathy (hazard ratio [HR]=4.199, 95% confidence interval [CI]: 3.056 — 5.770, P<0.001), AD type-bacterial infection (HR=1.826, 95%CI: 1.356 — 2.459, P<0.001), CRP (≥10.16 mg/L) (HR=2.356, 95%CI: 1.825 — 3.047, P<0.001), white blood cell count (HR=1.021, 95%CI: 1.002 — 1.041, P=0.035), hemoglobin (HR=0.994, 95%CI: 0.989 — 0.999, P=0.025), international normalized ratio (HR=1.657, 95%CI: 1.372 — 2.001, P<0.001), total bilirubin (HR=1.003, 95%CI: 1.002 — 1.004, P<0.001), albumin (HR=0.956, 95%CI: 0.926 — 0.986, P=0.004), creatinine (HR=1.005, 95%CI: 1.004 — 1.006, P<0.001), serum sodium (HR=0.976, 95%CI: 0.956 — 0.997, P=0.025), and lactate dehydrogenase (HR=1.001, 95%CI: 1.001 — 1.002, P<0.001) were all independent predictive factors for progression to ACLF within 90 days. The ROC curve analysis showed that CRP alone had an area under the ROC curve (AUC) of 0.724 (95%CI: 0.685 — 0.763) in predicting ACLF, and CRP+MELD score had the best predictive performance (AUC=0.870, 95%CI: 0.843 — 0.898), while CRP+CTP score and CRP+CLIF-C AD score had an AUC of 0.852 (95%CI: 0.823 — 0.881) and 0.845 (95%CI: 0.812 — 0.877), respectively. There was a significant increase in model performance after integration (P<0.05). ConclusionSerum CRP level on admission is an independent predictive factor for progression to ACLF within 90 days in patients with AD of cirrhosis, and a CRP level of ≥10.16 mg/L can be used as a simple threshold for identifying high-risk patients. Incorporating CRP into existing assessment systems may enhance the early identification of patients at a high risk for ACLF, which provides a reference for clinical intervention.
2.Prevalence and influencing factor of high myopia with fundus lesions in active-duty military personel
Shuqi SONG ; Di HUANG ; Xiaojuan LI ; Xueying WANG ; Zhenzhen WU ; Yongfeng SUN
International Eye Science 2026;26(10):1860-1864
AIM:To investigate the prevalence of ocular fundus lesions among active-duty military personnel with high myopia and to analyze the associated influencing factors.
METHODS: A cross-sectional study. Subjects included military personnel with high myopia(≤-6.00 D)and elongated axial length(≥26 mm). A systematic evaluation protocol was implemented, consisting of standardized questionnaires, general physical health examinations, and comprehensive ophthalmic assessments. Optical coherence tomography(OCT)was used to screen for fundus lesions in highly myopic subjects, and the prevalence of related lesions was calculated. Axial length, refractive error, best-corrected visual acuity(BCVA), and macular ganglion cell complex(GCC)thickness were measured. Univariate analysis was performed to compare differences in the above parameters between highly myopic subjects with and without concomitant fundus lesions. Multivariate Logistic regression analysis was further applied to identify risk factors for fundus lesions.
RESULTS:A total of 134 male patients(268 eyes)were enrolled, with the mean age of 24.5±3.2 y. Of the 268 eyes, 123 eyes(45.9%)showed positive signs of fundus lesions. Among these, parapapillary blood flow density reduction was found in 84 eyes(31.3%), GCC thinning in 46 eyes(17.2%), drusen in 8 eyes(3.0%), optic disc edema in 7 eyes(2.6%), retinoschisis in 6 eyes(2.2%), and choroidal excavation in 3 eyes(1.1%). BCVA was significantly lower in highly myopic patients with retinoschisis than in those without retinoschisis(P<0.05).Univariate analysis showed that refractive error, axial length, and posterior scleral expansion were associated with the occurrence of fundus lesions(P<0.05). Multivariate Logistic regression analysis revealed that axial length(OR=2.52, 95%CI: 1.67-3.80, P<0.001)and posterior scleral expansion(OR=3.12, 95%CI: 1.65-5.92, P<0.01)were significant risk factors for fundus lesions in highly myopic military personnel.
CONCLUSION: The prevalence of fundus lesions is relatively high among active-duty military personnel with high myopia. Peripapillary flow density reduction and GCC thinning are the most common manifestations in this population. Increased axial length and posterior scleral ectasia are significant contributing factors. It is recommended that OCT be incorporated into routine ophthalmic examinations for these military personnel, thereby providing a basis for the early detection and intervention of fundus lesions.
3.Etiology spectrum, clinical features, and gene mutations of unexplained intrahepatic cholestasis: An analysis of 62 cases
Jialuo WANG ; Yufeng ZHENG ; Qingfang XIONG ; Yongfeng YANG
Journal of Clinical Hepatology 2025;41(2):307-313
ObjectiveTo investigate the etiology and clinical features of intrahepatic cholestasis and the diagnostic value of whole exome sequencing (WES) through a retrospective analysis of the medical history, pathological results, and gene sequencing data of 62 patients with unexplained intrahepatic cholestasis. MethodsA retrospective analysis was performed for the clinical data of 480 patients who underwent WES due to unexplained liver function abnormalities in Nanjing Second Hospital from January 2017 to December 2023, among whom 62 patients with unexplained intrahepatic cholestasis were selected based on laboratory data, and a confirmed diagnosis was made based on imaging data, pathological findings, and gene sequencing data. The patients with unexplained intrahepatic cholestasis were analyzed in terms of demographic features, clinical manifestation, etiology spectrum, and genetic profile. ResultsA total of 62 patients with unexplained intrahepatic cholestasis were included, among whom there were 35 male patients and 27 female patients, with a median age of 42 (7 — 77) years. WES was used to make a definite diagnosis in 21 patients (33.87%), among whom the patients with familial intrahepatic cholestasis accounted for the highest proportion of 52.38% (11/21); genetic metabolic disorders were excluded by WES in 34 patients, with drug-induced liver injury and sepsis-associated liver injury accounting for the highest proportion of 55.88% (19/34), followed by primary biliary cholangitis and primary sclerosing cholangitis accounting for 20.59% (7/34) and intrahepatic bile duct stones accounting for 17.65% (6/34), while the patients with a lack of confirmed diagnosis accounted for 11.29% (7/62). A total of 21 novel mutation sites which were not reported in previous articles were identified in this study. ConclusionGenetic metabolic disorders constitute a significant proportion of unexplained intrahepatic cholestasis, and WES plays a crucial role in the diagnosis of unexplained intrahepatic cholestasis.
4.Analysis of the learning curve of transurethral 450 nm blue light vaporization of the prostate in a district hospital
Tao LI ; Lida CHEN ; Zhongyi WANG ; Yongfeng TIAN ; Qirui CAO ; Yangbo NIE
Journal of Modern Urology 2025;30(3):232-235
Objective: To explore the learning curve of transurethral 450 nm blue light vaporization of the prostate (TUBVP) in a district hospital,in order to provide reference for clinicians who plan to perform TUBVP. Methods: The clinical data of 56 patients with benign prostatic hyperplasia (BPH) who received TUBVP performed by the same group of surgeons in Chang'an District Hospital during Jun. and Dec. 2023 were retrospectively analyzed. Cumulative sum (CUSUM) was used to fit the learning curve of ratio of volume to operating time (RVOT) of prostate volume /450 nm blue light. The learning curve was divided into different stages according to the inflection points,and the clinical data of patients operated at different stages were analyzed and compared. Results: The learning curve of TUBVP was 21 cases,including 1-21 cases in the learning stage,22-38 cases in the improvement stage and 39-56 cases in the maturity stage. With the increase of cases,the postoperative bladder irrigation time reduced \[40.00 (26.00,44.50) h vs. 23.00(20.50,34.00) h vs. 23.50(14.75,40.75) h\],with statistical difference (P<0.05). The surgical efficiency increased \[(0.51±0.14) vs. (0.55±0.17) vs. (0.63±0.23)\],while the reduction of hemoglobin \[(6.43±7.35) g/L vs. (5.65±10.91) g/L vs. (2.61±7.36) g/L\],catheter indwelling time \[70.0 (66.0,106.0) h vs. 71.0 (66.0,89.0) h vs. 66.0 (58.5,78.5) h\],and incidence of complications (9.5% vs. 5.9% vs. 0) in the three stages showed a gradually decreasing trend,but with no statistical significance (P>0.05). Conclusion: The learning curve of TUBVP is 21 cases. For clinicians in district hospitals,TUBVP is a worthy choice.
5.Prevalence of common diseases among primary and secondary school students in Xinzhou District, Wuhan City in 2019-2022
Yongfeng HU ; Li MEI ; Shufeng WANG ; Haiyan CHEN ; Jiyun PEI
Journal of Public Health and Preventive Medicine 2025;36(4):133-136
Objective To investigate the growth, development and health status of primary and secondary school students in Xinzhou District of Wuhan, and analyze the detection and change trend of common diseases in primary and secondary school students, and to provide a basis for relevant departments to formulate prevention and control measures of common diseases in students. Methods The monitoring data of common diseases and health influencing factors of primary and secondary school students in Xinzhou District from 2019 to 2022 were analyzed and compared according to different genders, different grades and ages. SPSS 20.0 software was used to analyze the data of detection rates of myopia, dental caries, obesity, malnutrition and abnormal spinal curvature. Results The overall detection rates of myopia, dental caries, malnutrition, obesity and abnormal spinal curvature were 57.00%, 58.45%, 4.60%, 14.91%, and 6.33%, respectively, in Xinzhou District from 2019 to 2022. The annual change rates were 7.22%, 15.10%, -2.72%, 13.29%, and 4.91%, respectively. The detection rates of myopia, dental caries, obesity and abnormal spinal curvature showed an increasing trend in each year (χ2 ≥17.22, P<0.001). The detection rates of myopia and malnutrition increased with the increase of age and school level (both χ2≥42.37, P<0.001), while the opposite was true for the detection rates of dental caries and obesity (both χ2≥14.26, P<0.001). The detection rates of myopia and dental caries were higher in girls than in boys (both χ2≥33.66, P<0.001), while the detection rates of obesity and abnormal spinal curvature were higher in boys than in girls (both χ2≥8.22, P<0.005). The detection rates of myopia, dental caries, obesity and abnormal spinal curvature in 2019 were lower than those in 2020-2022 (χ2≥4.11, P<0.05), while the detection rates of malnutrition had decreased. Conclusion The growth, development and health status of primary and secondary school students in Xinzhou District are serious. The detection rate of common diseases such as myopia, dental caries, obesity and abnormal curvature of the spine is on the rise, which should be the focus of the surveillance work of common diseases in primary and secondary school students in the future, and comprehensive intervention measures are urgently needed to prevent and control these common diseases.
6.Clinical practice guidelines for perioperative multimodality treatment of non-small cell lung cancer.
Wenjie JIAO ; Liang ZHAO ; Jiandong MEI ; Jia ZHONG ; Yongfeng YU ; Nan BI ; Lan ZHANG ; Lvhua WANG ; Xiaolong FU ; Jie WANG ; Shun LU ; Lunxu LIU ; Shugeng GAO
Chinese Medical Journal 2025;138(21):2702-2721
BACKGROUND:
Lung cancer is currently the most prevalent malignancy and the leading cause of cancer deaths worldwide. Although the early stage non-small cell lung cancer (NSCLC) presents a relatively good prognosis, a considerable number of lung cancer cases are still detected and diagnosed at locally advanced or late stages. Surgical treatment combined with perioperative multimodality treatment is the mainstay of treatment for locally advanced NSCLC and has been shown to improve patient survival. Following the standard methods of neoadjuvant therapy, perioperative management, postoperative adjuvant therapy, and other therapeutic strategies are important for improving patients' prognosis and quality of life. However, controversies remain over the perioperative management of NSCLC and presently consensus and standardized guidelines are lacking for addressing critical clinical issues in multimodality treatment.
METHODS:
The working group consisted of 125 multidisciplinary experts from thoracic surgery, medical oncology, radiotherapy, epidemiology, and psychology. This guideline was developed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system. The clinical questions were collected and selected based on preliminary open-ended questionnaires and subsequent discussions during the Guideline Working Group meetings. PubMed, Web of Science, Cochrane Library, Scopus, and China National Knowledge Infrastructure (CNKI) were searched for available evidence. The GRADE system was used to evaluate the quality of evidence and grade the strengths of recommendations. Finally, the recommendations were developed through a structured consensus-building process.
RESULTS:
The Guideline Development Group initially collected a total of 62 important clinical questions. After a series of consensus-building conferences, 24 clinical questions were identified and corresponding recommendations were ultimately developed, focusing on neoadjuvant therapy, perioperative management, adjuvant therapy, postoperative psychological rehabilitation, prognosis assement, and follow-up protocols for NSCLC.
CONCLUSIONS
This guideline puts forward reasonable recommendations focusing on neoadjuvant therapy, perioperative management, adjuvant therapy, postoperative psychological rehabilitation, prognosis assessment, and follow-up protocol of NSCLC. It standardizes perioperative multimodality treatment and provides guidance for clinical practice among thoracic surgeons, medical oncologists, and radiotherapists, aiming to reduce postoperative recurrence, improve patient survival, accelerate recovery, and minimize postoperative complications such as atelectasis.
Humans
;
Carcinoma, Non-Small-Cell Lung/therapy*
;
Lung Neoplasms/therapy*
;
Combined Modality Therapy
;
Perioperative Care
7.Ultrasonic parameters of diaphragm motion combined with BODE index for predicting acute exacerbation of chronic obstructive pulmonary disease
Fangxin LIU ; Yongfeng REN ; Jian LI ; Shanshan WANG ; Lifang CAO ; Zhaojie CHEN
Chinese Journal of Medical Imaging Technology 2025;41(1):90-93
Objective To observe the value of ultrasonic parameters of diaphragm motion combined with BODE index for predicting acute exacerbation of chronic obstructive pulmonary disease(COPD).Methods Eighty COPD patients were retrospectively collected and divided into stable group(n=45)and acute exacerbation group(n=35).Ultrasonic parameters of diaphragm motion,including diaphragm excursion(DE)under quiet breathing(QB)and deep breathing(DB),i.e.DEQB and DEDB were measured.The general data,ultrasound parameters of diaphragm motion,and BODE index scores were compared between groups.Then logistic regression analysis was used to identify factors which could be used to independently predict acute exacerbations of COPD.The predicting performance of ultrasound parameters of diaphragm motion,BODE index and their combination were evaluated with receiver operating characteristic(ROC)curve and the area under the curve(AUC).Results Compared with stable COPD group,acute exacerbation group had higher BMI and BODE index scores(both P<0.05),as well as larger DEQB but smaller DEDB(both P<0.05).DEDB and BODE index were both independent predicting factors of acute exacerbation of COPD,while increased DEDB indicated decreased risk of acute exacerbation(OR[95%CI]=0.673[0.493,0.918],P<0.05),whereas increased BODE index suggested higher risk(OR[95%CI]=3.678[1.061,12.746],P<0.05).AUC for DEDB and BODE index alone for predicting acute exacerbation of COPD was 0.788 and 0.799,respectively,and of their combination was 0.979,significant higher than that of each alone(both P<0.05).Conclusion Ultrasonic parameters of diaphragm motion could be used to evaluate diaphragm function in COPD patients.Combination of DEDB and BODE index had better performances in predicting acute exacerbation of COPD.
8.Meta-analysis of Buzzy? device in alleviating puncture-related pain and anxiety of children
Xiaoyan LI ; Faguang JIN ; Xiaofang WANG ; Mingjing DU ; Wenhua ZHANG ; Yongfeng ZHANG
China Medical Equipment 2025;22(3):88-96
Objective:To assess the effectiveness of Buzzy? device in alleviating pain and anxiety in children during puncture-related operation,and to provide more comprehensive intervention option for puncture-related management of children.Methods:Randomized controlled trials(RCTs)about the application of Buzzy? device in puncture-related pain and anxiety of children were searched from China National Knowledge Infrastructure(CNKI),Wanfang,VIP,PubMed,Embase and Web of Science(WOS)databases.The retrieval time was from the establishment of the database to July 2023.In the interventions measures,the control groups used different methods that included standard care group,ShotBlocker device group and distraction card group.The obtained 528 relevant literatures were implemented literature selection and data extraction by two independent reviewers according to the established inclusion and exclusion criteria.RevMan5.4 and Stata17.0 software were adopted to conduct Meta-analysis for the pain and anxiety of main outcome indicators,and the success rate of the first puncture,parents'satisfaction and adverse events of secondary outcome indicators in the literatures.Results:A total of 20 eligible studies that could meet the conditions were included,involving 2 876 children,including 1 110 children in the Buzzy? device group and 1 766 children in the control group.The Buzzy? device group was better than the standard care group and the distraction card group in alleviating puncture-related operation pain in children,and the differences of that among them were statistical significance(Z=7.18,2.13,P<0.05),and was better than the standard care group in anxiety,and the difference was statistical significance(Z=5.00,P<0.05).The Buzzy? device group and the distraction card group were better than standard care group and Shotblocker device group in satisfaction,and the difference was significant(x2=63.236,P<0.05).The interventions in the Buzzy? device group and other groups did not have effect on the success rate of the first puncture and incidence of adverse event.Conclusion:The Buzzy? device can alleviate pain and anxiety of children during puncture operation,and improve children's satisfaction for puncture operation.It does not affect the success rate of puncture,and there is not adverse events in its operation.
9.Trends and Age-Period-Cohort Model Analysis of Inci-dence and Mortality of Hepatitis B Virus-Related Liver Cancer Globally and in China from 1992 to 2021
Yongfeng YAN ; Yaqin ZHANG ; Chunsun FAN ; Jun WANG ; Yuanyou XU ; Xiaoxia ZHU ; Jian ZHU
China Cancer 2025;34(9):698-705
[Purpose]To analyze the changing trends of the disease burden of liver cancer related to hepatitis B virus(HBV)globally and in China from 1992 to 2021.[Methods]Based on the Global Burden of Disease database in 2021,indicators such as the age-standardized incidence rate and mortality rate of HBV-related liver cancer globally and in China from 1992 to 2021 were collected.The Joinpoint regression model was used to analyze the changing trends of epidemiologi-cal characteristics,and the age-period-cohort model was adopted to analyze the impacts of age,period,and cohort factors on the incidence and mortality risks of HBV-related liver cancer globally and in China.[Results]From 1992 to 2021,the age-standardized incidence rate and age-standardized mortality rate of HBV-related liver cancer globally generally showed a trend of decreasing.The average annual percentage changes were-0.31%and-0.61%,respectively,and all the down-ward trends were statistically significant(both P<0.05).During the same period,the average annu-al percentage changes of the age-standardized incidence rate and age-standardized mortality rate of HBV-related liver cancer in China were-0.45%and-0.90%,respectively,and all the downward trends were statistically significant(both P<0.05).The results of the age-period-cohort model anal-ysis showed that from 1992 to 2021,the annual net drift rates of the incidence of HBV-related liver cancer globally and in China were-0.71%(95%CI:-0.84%~-0.57%)and-0.73%(95%CI:-1.01%~-0.44%),respectively.The annual net drift rates of the mortality were-1.15%(95%CI:-1.28%~-1.02%)and-1.42%(95%CI:-1.69%~-1.14%),respectively,all showing an over-all decline.The age effect showed that the risk of HBV-related liver cancer incidence in both the global and Chinese populations began to increase after 30 years of age,peaking in the 70~74 age group,while the risk of mortality surged after 40 years of age and peaked in the population aged 80 and above.The period effect indicated that the incidence and mortality risks were the highest from 1997 to 2001 and the lowest from 2017 to 2021.The cohort effect revealed that the inci-dence and mortality risks gradually decreased in populations born after 1962,with the 2007-2011 birth cohort having the lowest risks.The results of the Wald x2 test showed that there were statistically significant differences in the changing trends of the age,period,and cohort effects on the incidence and mortality of HBV-related liver cancer globally and in China(all P<0.05).[Con-clusion]From 1992 to 2021,the age-standardized incidence rate and age-standardized mortality rate of HBV-related liver cancer showed a downward trend both globally and in China.The disease burden of HBV-related liver cancer in China was higher than the global level.The age-period-cohort model has revealed the historical changes in the incidence and mortality of HBV-related liver cancer.The current and future situation of the disease burden of HBV-related liver cancer is not optimistic.It is recommended to implement precise stratified interventions for populations of different ages,periods,and birth cohorts,and actively transform the prevention,treatment,and management strategies for HBV-related liver cancer.
10.Construction of a risk prediction model for knee joint stiffness after arthroscopy in patients with tibial plateau fractures
Shuaishuai GAO ; Yanjun WANG ; Yongfeng YAO ; Qun ZHOU
Chinese Journal of Postgraduates of Medicine 2025;48(9):831-837
Objective:To analyze the influencing factors of knee joint stiffness in patients with tibial plateau fractures after arthroscopy and construct a predictive model.Methods:The clinical data of 154 patients with tibial plateau fractures from June 2020 to May 2023 in Xi'an Daxing Hospital were retrospectively analyzed. All patients were treated with arthroscopic assisted internal fixation surgery. The gender, age, body weight, fracture cause, Schatzker classification, osteoporosis, meniscus and ligament structure injury, lower limb malalignment, bone graft, knee extension device injury, internal fixation method, external fixation time, heterotopic ossification, Tscherne classification, drainage tube placement, debridement times, operation opportunity and anesthesia method were recorded. The patients were followed up for 1 year, and the occurrence of knee joint stiffness was recorded. The patients were divided into knee joint stiffness group and normal knee joint group. Multivariate Logistic regression was used to analyze the independent risk factors of knee joint stiffness after arthroscopy in patients with tibial plateau fractures. R language software package was used to construct the nomogram model for predicting the knee joint stiffness after arthroscopy in patients with tibial plateau fractures, calibration curve was drawn, and the Bootstrap method was used to verify the model discrimination. The predictive value of model was evaluated by the receiver operating characteristics (ROC) curve.Results:Among 154 patients with tibial plateau fractures, 28 patients developed knee joint stiffness after arthroscopy (knee joint stiffness group), with an incidence rate of 18.18%; 126 patients had normal knee joints (normal knee joint group). The proportions of obesity, meniscus and ligament structure injury, knee extension device injury, lower limb malalignment and heterotopic ossification in knee joint stiffness group were significantly higher than those in normal knee joint group, and there were statistical differences ( P<0.05 or <0.01); there were no statistical differences in gender composition, age, fracture cause, osteoporosis, Schatzker classification, bone graft, internal fixation method, external fixation time, Tscherne classification, drainage tube placement, debridement times, operation opportunity and anesthesia method between the two groups ( P>0.05). Multivariate Logistic regression analysis result showed that obesity, meniscus and ligament structure injury, knee extension device injury, lower limb malalignment and heterotopic ossification were independent risk factors for knee joint stiffness after arthroscopy in patients with tibial plateau fractures ( OR = 5.387, 4.613, 3.308, 3.178 and 4.579; 95% CI 1.207 to 24.034, 1.447 to 14.709, 1.063 to 10.291, 1.155 to 8.745 and 1.540 to 13.613; P<0.05 or <0.01). The body weight, meniscus and ligament structure injury, knee extension device injury, lower limb malalignment and heterotopic ossification were used as predictors to construct a nomogram model for predicting the knee joint stiffness after arthroscopy in patients with tibial plateau fractures. The calibration curve analysis result showed that the theoretical curve was basically consistent with the actual curve trend trajectory ( C- index = 0.861). The ROC curve analysis result showed that the model for predicting the knee joint stiffness after arthroscopy in patients with tibial plateau fractures had good accuracy (area under curve was 0.861), with the sensitivity of 92.9% and specificity of 73.0%. Conclusions:The patients with tibial plateau fractures have the risk of knee joint stiffness after arthroscopy, which may be related to patient obesity, meniscus and ligament structure injury, knee extension device injury, lower limb malalignment and heterotopic ossification. Based on these risk factors, a column chart risk prediction model can be constructed to visualize the risk and have certain predictive value for knee joint stiffness within 1 year after surgery.


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