Background: In recent decades, there has been a global increase in the burden of rheumatoid arthritis (RA) among adolescents and young adults (AYAs), making it a significant public health issue. However, our understanding of the disease burden, harm, and influencing factors of RA in this population remains insufficient. This study aimed to assess the trends in RA burden among AYAs aged 10–24 years from 1990 to 2019 at the global, regional, and national levels. Methods: Incidence, prevalence, and disability-adjusted life years (DALYs) rate per 100,000 population, as well as average annual percentage changes (AAPCs), of RA among individuals aged 10–24 years were reported globally, regionally, and nationally based on the Global Burden of Diseases, Injuries, and Risk Factors Study 2019 (GBD 2019). These global trends were further analyzed by age, sex, and Sociodemographic index (SDI). Joinpoint regression analysis was used to determine the year in which the most significant changes in global trends occurred. Results: Globally, the incidence of RA among AYAs increased from 4.98 per 100,000 population in 1990 to 5.41 per 100,000 population in 2019, with an AAPCs of 0.29 (95%CI: 0.26, 0.32, p < 0.001). The most significant increase occurred in 2000, while the most significant decrease occurred in 2014. The prevalence increased from 34.11 per 100,000 population in 1990 to 36.34 per 100,000 population in 2019, with an AAPCs of 0.22 (95%CI: 0.19, 0.24, p<0.001); The most significant increase was observed in 2000, and the most significant decrease occurred in 2014. DALYs rate with RA were 5.96 per 100,000 population in 1990 and 5.79 per 100,000 population in 2019 for AYAs, with an average decrease of 0.1 years per year (AAPCs = -0.1, 95%CI: -0.2, -0.01, p = 0.04). In terms of gender, the incidence, prevalence, and DALYs rate were higher for females compared to males during the same period. Regarding age, the incidence, prevalence, and DALYs rate increased with increasing age. Based on the SDI quintile, the incidence, prevalence, and DALYs rate of RA were highest in countries with high SDI and lowest in countries with low SDI from 1990 to 2019. However, the relationship between incidence and SDI is non-linear. In terms of regions, Tropical Latin America exhibited the highest incidence, prevalence, and DALYs rate, while Andean Latin America experienced the most rapid increase in incidence and prevalence. Southern Latin America saw the fastest growth in DALYs rate, whereas Southern Sub-Saharan Africa witnessed the most significant decline. Conclusion: In conclusion, the study revealed an overall increase in the incidence and prevalence of RA among adolescents and young adults (AYAs) over the past three decades, while DALYs rate remained relatively stable. Furthermore, the incidence, prevalence, and DALYs rate of RA were found to increase with age. Fortunately, recent proactive preventive measures and treatment methods have shown promising results. Moving forward, it is crucial to prioritize the female population and AYAs patients in order to further alleviate the global burden of RA.

Background: Studies have shown that the spherical shape of the lateral femoral condyle has a clear relationship with the relative axial movement of tibiofemoral joint and the anterior cruciate ligament (ACL) rupture. The purpose of this study was to describe the distal curvature of the lateral femoral condyle by ratio of height of lateral femoral condyle to anteroposterior diameter (HAPR), and evaluate its correlation with ACL rupture. Methods: A retrospective case-control study of 64 patients was conducted. Two age-and sex-matched cohorts (each n = 32) were analyzed: primary ACL ruptures, and a control group consisting of isolated meniscal tears. On the radiograph, the distance from the intersection of the axis of the distal femur and the anteriorly diameter of the lateral femoral condyle to the lower point of the lateral femoral condyle divided by the anteriorly diameter of the lateral femoral condyle is HAPR. The HAPR was measured by digital radiograph imaging systems (DR) to quantify femoral sphericity. Cutoff values were defined; and diagnostic performance of the risk factors was assessed. Meanwhile, we measured the posterior tibial slope (PTS) on radiograph and compared the two methods to evaluate the significance of HAPR in predicting ACL rupture. Results: A total of sixty-four patients who met the inclusion criteria were included in the final analysis (32 with primary ACL rupture, 32 controls). The HAPR was smaller in the knees with primary ACL rupture (0.31 ± 0.02) than that of the control group (0.33 ± 0.02) (p < 0.01). The PTS was bigger in the knees with primary ACL rupture (8.18 ± 2.77) than that of the control group (6.61 ± 2.85) (p = 0.036). The AUC of HAPR was bigger (0.825; 95% CI, 0.72–0.93) than that of PTS (0.675; 95%CI, 0.85–0.81). The calculated cutoff of HAPR of 0.32 (Youden index, 0.56) was associated with an increased risk for ACL rupture, with sensitivity of 75% and specificity of 81% to predict an ACL rupture. Conclusions: This study showed that a decreased HAPR is associated with an ACL rupture, and the decrease of HAPR was more significant in predicting ACL ruptures than the PTS. This helps clinicians identify susceptible individuals who may benefit from targeted ACL rupture prevention counseling and intervention.

Objective: To comprehensively analyze the ADRs associated with Denosumab (Prolia) in the treatment of osteoporosis using data from the FAERS database, and gain a better understanding of the potential risks and side effects of Denosumab (Prolia) therapy.Methods: Data of Denosumab (Prolia) were collected from the FAERS database covering the period from first quarter of 2010 to the third quarter of 2023. Disproportionality analysis was performed by calculating the reporting odds ratios (ROR), proportional reporting ratio (PRR), and Bayesian analysis confidence propagation neural network (BCPNN) to detect positive signals.Results: Totally, 17,985,365 reports were collected from the FAERS database, 1,97,807 reports of Denosumab (Prolia) were identified as the “primary suspected (PS)” ADRs. Denosumab (Prolia) induced ADRs occurred in 27 organ systems. 38 significant disproportionality PTs satisfying with the three algorithms were retained at the same time. Unexpected significant ADRs such as bone density abnormal and immobile also occur. The majority of the ADRs occurred within the first 30 days after Denosumab (Prolia) initiation.Conclusion: Based on the American FAERS database, the high frequency ADRs of Denosumab (Prolia) were hypocalcaemia, bone density abnormal, eczema, rebound effect, spinal deformity, etc. Clinical use of this drug should focus on this part of ADRs. Attention should also be paid to newly discovered ADRs, such as immobile, menopausal symptoms, etc., to avoid more serious consequences. Cohort studies, more detailed and comprehensive case information, and long-term clinical investigations are needed to confirm these results and to further understand the safety profile of Denosumab (Prolia).

Purpose: The purpose of this study was to examine the relationship between distal femoral morphology and noncontact anterior cruciate ligament (ACL) rupture and the differences between digital X-ray imaging systems (DR) and magnetic resonance imaging (MRI) to evaluate distal femoral morphology. Methods: A retrospective case-control study was performed on 120 patients. Two age- and sex-matched cohorts (each n = 60) were analyzed: primary ACL ruptures and a control group consisting of isolated meniscal tears. The lateral femoral condyle index (LFCI) was measured by DR and by MRI to quantify femoral sphericity. Differences among two groups were compared, and diagnostic performance of the risk factors was assessed. In addition, differences between DR and MRI to evaluate LFCI were examined. Results: The LFCI by MRI was smaller in the knees with primary ACL rupture (median, 0.71; range, 0.62– 0.78) than that of the control group (median, 0.77; range, 0.66– 0.85) (p < 0.01). The LFCI was also significantly smaller in the knees with primary ACL rupture (median, 0.72; range, 0.63– 0.77) than that of the control group (median, 0.79; range, 0.65– 0.84) (p < 0.01) by DR. A cutoff of 0.74 of MRI yielded a sensitivity of 77% and a specificity of 78% to predict an ACL rupture, and of 0.75 of DR yield a sensitivity of 87% and a specificity of 77% to predict an ACL rupture. Conclusion: This study showed that a decreased LFCI is associated with an ACL rupture, and both DR and MRI measurements can effectively predict the risk of ACL rupture. This helps expand the scope of the application of the LFCI and helps clinicians identify susceptible individuals who may benefit from targeted ACL rupture prevention counseling and intervention.