Multivariable-adjusteda and unadjusted estimates of proportion of patients with moderate [1, 2] ADL and severe (≥3) ADL limitation. TKA total knee arthroplasty; THA total hip arthroplasty. aAdjusted for age, gender, race, education level, employment status, marital status, smoking status, self-report of six physician-diagnosed comorbidities (asthma/COPD, arthritis, depression, diabetes, heart disease, hypertension), percent service connection, and single vs. multiple-site use