Does total shoulder arthroplasty improve patients' activity levels?

Abstract

Total shoulder arthroplasty (TSA) decreases pain, improves range of motion, and increases strength. Whether these improvements translate to improvements in activity levels postoperatively remains unknown. The Shoulder Activity Level (SAL) is a valid and reliable outcomes survey that measures the patient's activity level. Currently, no studies have specifically examined the effect of TSA on SAL. A prospective collection of preoperative, patient-determined outcomes on patients undergoing TSA was compared with postoperative scores at a minimum of 2 years. These scores included the SAL, Western Ontario Osteoarthritis of the Shoulder Index (WOOS), American Shoulder and Elbow Surgeons (ASES) Standardized Shoulder Assessment, Single Assessment Numeric Evaluation (SANE), and the Simple Shoulder Test (SST). Inclusion criteria were patients undergoing primary anatomic TSA or reverse TSA. A mean follow-up of 3.7 years was available for 80 anatomic and 42 reverse TSAs. Anatomic TSAs had improvements from median preoperative scores to median postoperative scores for WOOS (34 to 89; P < .0001), ASES (30 to 87; P < .0001), SST (2 to 9; P < .0001), and SANE scores (23 to 90; P < .0001). The SAL improved from 7 to 8 but did not quite reach statistical significance (P = .07). Reverse TSAs had improvements from median preoperative scores to median postoperative scores for WOOS (31 to 83; P < .0001), ASES (29 to 82; P < .0001), SST (2 to 7; P < .0001), and SANE scores (20 to 85; P < .0001). The SAL improved from 4.5 to 6, but this did not reach statistical significance (P = .38). However, when anatomic and reverse TSAs were analyzed together, a statistically significant improvement was found postoperatively in the SAL (from 6 to 8; P = .006). Anatomic TSA and reverse TSA improved activity levels. In addition, disease-specific and joint-specific quality of life scores all had statistically significant improvements. This study suggests that after shoulder arthroplasty patients in general have (1) significant improvements in their quality of life and (2) have small improvements in activity level. This study shows that most patients do not have to decrease their activity levels to diminish symptoms to an acceptable range.