Medical Journal of the Islamic Republic Of Iran

en Predictive Factors for Length of Stay in Patients Undergoing Total Hip Arthroplasty: A Cross-Sectional Study Orthopedic Surgery Orthopedic Surgery Original Research Original Research Background: Total hip arthroplasty (THA) is an effective surgery for patients with end-stage hip joint degenerative arthritis. This study aimed to determine peri-operative factors that impact the length of stay (LOS) and design a formula to predict LOS in patients undergoing THA.    Methods: This cross-sectional study was performed from September 2019 to January 2020. For this study, all patients who underwent THA over a period of 12 years since 2005 were included in the study. Data about the LOS and several variables including demographic variables, surgery-related variables, transfusion, intensive care unit (ICU) admission, past drug history, comorbidities, and laboratory data, were gathered. Qualitative variables are presented as numbers (%), and quantitative variables are presented as mean Mann± standard deviation. Mann Whitney test , Kruskal-Wallis test, and  Spearman’s rank correlation test were also used.    Results: A total of 524 patients were included in the study; 12 were excluded .261 (51%) were female and 251(49%) male. The mean age was 56.13±17.04 years. In the univariate analysis, the day of admission, surgery indication, transfusion, diabetes mellitus, oral anti-diabetic drugs, American Society of Anesthesiology (ASA) score, preoperative hemoglobin (Hb) level, and type of prosthesis showed significant relation with LOS. Significant variables entered to zero truncated negative binomial regression. Among them, the day of admission, ASA score, preoperative Hb level, and type of prosthesis showed significant relation with LOS (P < 0.05) and were used for model design.    Conclusion: Preoperative Hb level, ASA score, day of admission, and prosthesis type have an impact on LOS and can predict LOS in patients who are candidates for THA.   Length of Stay, Prediction, Total Hip Arthroplasty 900 904 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-7578-1&slc_lang=en&sid=1 Paria Bolourinejad pariapb_sb@yahoo.com 200319475328460081115 200319475328460081115 No Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran Mehdi Motififard motifi298@yahoo.com 200319475328460081116 200319475328460081116 No Kashani Hospital, Isfahan University of Medical Sciences, Isfahan, Iran Maryam Kazemi naeini maryam_kazemi_ui88@yahoo.com 200319475328460081117 200319475328460081117 No School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran Mahdie Saffari mahie90hp@gamil.com 200319475328460081118 200319475328460081118 No Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran Fateme Salehi dr.fatemesalehi73@gmail.com 200319475328460081119 200319475328460081119 No Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran Pouya Rajabzade pouya.rajabzade.md@gmail.com 200319475328460081120 200319475328460081120 No Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran Amin Lachinani amin13724@yahoo.com 200319475328460081121 200319475328460081121 No Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran Amid Yazdani amid.yazdani@gmail.com 200319475328460081122 200319475328460081122 No Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran Mohsen Kheradmand Mohsen.kheradmand@yahoo.com 200319475328460081123 200319475328460081123 No Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran Amin Nemati nemati@med.mui.ac.ir 200319475328460081124 200319475328460081124 Yes Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran