Eulji University

The impact of age on the relationship between body mass index (BMI) and all-cause mortality in hemodialysis (HD) patients is not clearly understood. We analyzed the association between BMI and all-cause mortality, stratified by age, in patients undergoing HD using data from the Korean Renal Data System (KORDS). We analyzed 66,129 HD patients from the 2023 KORDS database, with data collected between 2001 and 2022. Patients were grouped by age: <65 years ("young" group, n = 24,589), 65-74 years ("younger-old" group, n = 17,732), and ≥75 years ("older-old" group, n = 23,808). Patients were further stratified into BMI quartiles. Kaplan-Meier curves and event time ratio for the relative change in the survival time were calculated. During the follow-up period, 14,360 (21.7%) of the patients died, with a median follow-up of 3.4 years. Kaplan-Meier curves revealed poorer outcomes in lower BMI quartiles across all age groups. The lowest BMI quartile was significantly associated with a shorter survival time compared to the highest BMI quartile, with a 15% reduction in the young group (p = 0.001) and a 12% reduction in the older-old group (p = 0.002). Predicted survival time increases with rising BMI in the young group, but the rate of increase slows in the younger-old group and plateaus in the older-old group after around a BMI of 25 kg/m2. The decline in survival time with age was more pronounced in the 7-year survival than the 2-year survival. Lower BMI is associated with higher all-cause mortality in HD patients, with a more pronounced impact in younger patients.

Background Comparative studies of posterior lumbar interbody fusion with cortical bone trajectory and pedicle screw in older patients, particularly in those aged ≥ 80 years, are rare. This study aimed to retrospectively analyze the clinical and surgical outcomes following posterior lumbar interbody fusion with pedicle screw fixation compared to cortical bone trajectory in patients aged ≥ 80 years with degenerative lumbar spine disease. Methods We included 68 patients aged ≥ 80 years who underwent degenerative lumbar spinal surgery at our spine center between January 2011 and December 2020. Of these 68 patients, 24 and 44 underwent posterior lumbar interbody fusion with cortical bone trajectory and pedicle screw, respectively. Results The Visual Analog Scale for back pain was significantly lower in the cortical bone trajectory group than in the pedicle screw group at 6 months postoperatively (P = 0.049). The Oswestry Disability Index was significantly lower in the cortical bone trajectory group than in the pedicle screw group at 6 months postoperatively (P = 0.05). The estimated blood loss and operation time were significantly lower in the cortical bone trajectory group than in the pedicle screw group (P = 0.017 and P < 0.001, respectively). Postoperative morbidity was also lower in the cortical bone trajectory group (P = 0.049). Conclusions Despite these limitations, our study findings indicate that cortical bone trajectory is not inferior to posterior lumbar interbody fusion with pedicle screw fixation if there is a need for fusion in older patients aged ≥ 80 years.

Background: Limited data exist regarding the safety of direct oral anticoagulants in hemodialysis patients with venous thromboembolic disease. This study aims to investigate the safety of direct oral anticoagulants in hemodialysis patients using national data. Methods: The National Health Insurance Service database was retrospectively queried to identify chronic kidney disease patients who took direct oral anticoagulants for venous thromboembolism from 2008 to 2019. Bleeding complications and all-cause mortality were compared between 118 hemodialysis patients (HD group) and 227 matched chronic kidney disease patients not undergoing hemodialysis (CKD group). Results: The use of direct oral anticoagulants among chronic kidney disease patients, with or without dialysis, increased over time. The incidence rate of all-cause mortality per 100 person-years was 38.1 in the HD group and 10.5 in the CKD group (adjusted hazard ratio [HR], 3.28; 95% confidence interval [CI], 2.27-4.75; p < 0.001). When considering death as a competing risk, there was no significant difference in gastrointestinal bleeding (adjusted HR, 1.61; 95% CI, 0.91-2.88; p = 0.115) and intracranial bleeding (adjusted HR, 1.86; 95% CI, 0.73-4.74; p = 0.193) between the HD and CKD groups. Conclusion: In comparison to chronic kidney disease patients not on hemodialysis, the major bleeding risk, including gastrointestinal and intracranial bleeding, was comparable in hemodialysis patients using direct oral anticoagulants for venous thromboembolism.

Background The aim of surgical treatment for posterolateral rotatory instability (PLRI) of the elbow is to restore the integrity of the lateral ulnar collateral ligament (LUCL), with ligamentous reconstruction being the preferred option for recurrent symptomatic PLRI. However, there is no clinical evidence demonstrating the superiority of reconstruction versus repair. Treatment options currently depend on the cause of the LUCL injury and surgeon preference. Purpose To review studies comparing surgical outcomes of LUCL reconstruction versus repair in treating PLRI of the elbow. Study Design Systematic review; Level of evidence, 4. Methods This review was conducted according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. A literature search was conducted on PubMed, Medline (via EBSCO), ProQuest, and ScienceDirect databases using the following keywords: “(lateral ulnar collateral ligament reconstruction)” OR “(lateral ulnar collateral ligament repair)” AND “(outcome).” Excluded were studies in languages other than English, those that included terrible triad injury, transolecranon fracture, radial head arthroplasty involvement, associated procedures, animal studies, and biomechanical studies. A total of 193 studies were identified after the initial search. The primary outcome measure was the Mayo Elbow Performance Score, which was compared between studies using a random-effects model. Results Overall, 20 studies (N = 646 patients) were included, with 445 of 646 patients (68.8%) in the LUCL reconstruction group and 201 of 646 patients (31.1%) in the LUCL repair group. All injuries in the included studies were traumatic. The LUCL reconstruction group had a longer follow-up period compared with the LUCL repair group (72.05 ± 43.51 vs 36.86 ± 21.19 months, respectively). The postoperative range of motion arc was similar in both the repair and reconstruction groups (135.02°± 15.33° vs 133.60°± 8.84°, respectively). Both LUCL repair and LUCL reconstruction resulted in good to excellent outcomes on patient-reported outcome measures; however, a superior rate of return to activity and a lower complication rate were found after LUCL reconstruction versus LUCL repair (8.3% vs 14.9%). Ulnar nerve event (2.3%) was the most common complication in both groups. Conclusion Findings indicated that LUCL reconstruction had a superior rate of return to activity and a lower complication rate compared with LUCL repair.

In aesthetic plastic surgery, nasal septal extension grafts are crucial for influencing nasal lengthening, tip projection, rotation, and overall shape. Establishing robust binding between the septal graft and cartilage is vital for achieving favorable surgical outcomes. This study evaluated three linking methods (overlapping, bilateral overlapping, and digitating types) for cartilage connection, aiming to identify the method with the highest structural stability. Using polydimethylsiloxane (PDMS) and thermoplastic polyurethane (TPU) to simulate soft and hard cartilage, mechanical properties were assessed through tension, compression, and bending tests. The digitating method showed superior structural stability in shear bending test, but no significant differences were observed for other loading types. The findings suggest that the pretension balance of sutures is more crucial than the choice of linking methods.

The American Joint Committee on Cancer (AJCC) 8th edition TNM staging manual, which provided ypTNM for patients undergoing neoadjuvant therapy (NAT), has not been comparatively assessed against pTNM for prognosis in pancreatic cancer. This study aimed to compare the prognosis between ypTNM and pTNM stages. Clinicopathological data from 586 patients who underwent pancreatic cancer surgery at a tertiary center between 2018 and 2022 were analyzed to compare survival outcomes between ypTNM and pTNM stages and identify prognostic factors. The analysis included 541 patients (100 ypTNM, 441 pTNM). Significant differences in overall survival (OS) were observed among patients stratified by TNM stage (p < 0.001). However, no significant difference in OS was found between the ypTNM and pTNM groups (2-year survival rate (YSR): 76.8% vs. 66.7%, p = 0.094). Subgroup analysis by stage I (82.4% vs. 76.2%, p = 0.577) and II (68.8% vs. 61.6%, p = 0.715), and III (53.0% vs. 49.8%, p = 0.596) revealed similar survival rates. Multivariate analysis identified factors associated with OS: age > 65 years (HR 1.763, p < 0.001), CA19-9 > 150 U/mL (HR 1.439, p = 0.014), preoperative biliary drainage (HR 1.405, p = 0.029), pathologic T2 stage (HR 1.961, p = 0.004) and T3/4 stage (HR 2.830, p < 0.001) versus T0/1 stage, lymphovascular invasion (HR 2.220, p < 0.001), and adjuvant treatment (HR 0.251, p < 0.001). This study confirms comparable survival outcomes between ypTNM and pTNM stages in surgically resected pancreatic cancer, affirming the applicability of the TNM staging system after NAT. The results highlight the utility of TNM staging in guiding therapeutic decisions for patients undergoing NAT.

Purpose Pediatric papillary thyroid cancer (PTC) is recommended to perform aggressive surgery to reduce the risk of recurrence. This study was designed to evaluate the concurrent association between multifocality, bilaterality, and the risk of recurrence in pediatric PTC. Materials and Methods This retrospective cohort study included pediatric patients (age <19 years) who underwent total thyroidectomy for PTC between 1996 and 2014 in a single tertiary center. Clinicopathological parameters were analyzed to evaluate the prevalence of multifocality, bilaterality, recurrence, and their association. Results We analyzed 58 pediatric patients with PTC. There was no factor related to the presence of multifocality or bilaterality in multivariate analysis. Also, in univariate analysis, multifocality and bilaterality were not independent risk factors of each other’s presentation (p=0.061 and p=0.061, respectively). Recurrence was observed in 19 (32.8%) patients. In multivariate analysis of recurrence, clear cell subtype, multifocality, and gross extrathyroidal extension (ETE) were independent risk factors (p=0.027, p=0.035, and p=0.038, respectively). Most recurrences (68.4%) happened during the first 4 years of follow-up after the initial thyroidectomy. Conclusion Multifocality and bilaterality were not independent risk factors of each other’s presentation; however, multifocality was the risk factor for recurrence in pediatric PTC. For pediatric PTC, close monitoring for recurrence within the initial 4 years is recommended, particularly in patients with clear cell subtype, multifocality, and gross ETE.

Background and Purpose Parkinson’s disease (PD) is characterized by various prodromal symptoms, and these symptoms are mostly investigated retrospectively. While some symptoms such as rapid eye movement sleep behavior disorder are highly specific, others are common. This makes it challenging to predict those at risk of PD based solely on less-specific prodromal symptoms. The prediction accuracy when using only less-specific symptoms can be improved by analyzing the vast amount of information available using sophisticated deep-learning techniques. This study aimed to improve the performance of deep-learning-based screening in detecting prodromal PD using medical-claims data, including prescription information. Methods We sampled 820 PD patients and 8,200 age- and sex-matched non-PD controls from Korean National Health Insurance cohort data. A deep-learning algorithm was developed using various combinations of diagnostic codes, medication codes, and prodromal periods. Results During the prodromal period from year -3 to year 0, predicting PD using only diagnostic codes yielded a high accuracy of 0.937. Adding medication codes for the same period did not increase the accuracy (0.931–0.935). For the earlier prodromal period (year -6 to year -3), the accuracy of PD prediction decreased to 0.890 when using only diagnostic codes. The inclusion of all medication-codes data increased that accuracy markedly to 0.922. Conclusions A deep-learning algorithm using both prodromal diagnostic and medication codes was effective in screening PD. Developing a surveillance system with automatically collected medical-claims data for those at risk of developing PD could be cost-effective. This approach could streamline the process of developing disease-modifying drugs by focusing on the most-appropriate candidates for inclusion in accurate diagnostic tests.