7474 primary TJAs among 120,847 TJA patients discharged within 24hhYounger (<50 years), male sex, American Society of Anesthesiologists class 1 or 2, and less likely to be obese or taking steroids (P < .05 for all). They were also less likely to have co-morbidities. Age > 80, bleeding-causing disorders, smokers = predictor for adverse effects Rapid Recovery Total Joint Arthroplasty is Safe, Efficient, and Cost-Effective in the Veterans Administration Setting Yanik et al. 2018 LOS decreased from 3.2 to 1.7 days (P < .0001) Measuring rapid recovery program outcomes: are all patients candidates for rapid recovery Callaghan et al 2015 Is Rapid Recovery Hip and Knee Replacement Possible and Safe in the Octogenarian Patient? [6] Edwards et al 2017 N = 2482, retrospective review Octogenarians receiving primary THA and TKA were discharged home >90% of the time with LOSs <2 days and low readmission rates. Revision THA and TKA patients aged 80 years and older were discharged home about 70% of the time with significantly longer LOSs than patients aged more than 80 years. Factors associated with hospital stay length, discharge destination, and 30-day readmission rate after primary hip or knee arthroplasty: Retrospective Cohort Study [7] Roger et al 2019 N = 938 THA, n = 725 TKA, retrospective cohort study Factors predicting discharge to rehabilitation unit were older age, female gender, chronic obstructive pulmonary disease, anxiety-depressive disorder, and a history of stroke. Risk factors for 30-day readmission were male gender, obesity, and discharge to rehabilitation unit. Primary Total Hip Arthroplasty With Same-Day Discharge: Who Failed and Why [8] Kim et al 2019 N =164, 143 discharges same day Women, patients younger than 40 years, and patients older than 60 years all had an increased risk of failing the program. Body mass index of 26 kg/m 2 or less was associated with a 40% greater risk of failure. Patients with an ASA score of 3 had a 3-fold risk of failure compared with patients with an ASA score of 2 or less. Predictors of (Un)successful Same-Day Discharge in Selected Patients Following Outpatient Hip and Knee Arthroplasty [4]