Table 6.
Comparison of patients responding or not responding to the Western Ontario Osteoarthritis of the Shoulder index (WOOS). Values are n (%) unless otherwise specified
| Responders | Non-responders | ||
|---|---|---|---|
| Factor | (n = 454) | (n = 278) | p-value |
| Type of arthroplasty | 0.5 | ||
| SHA | 347 (76) | 222 (80) | |
| RTSA | 70 (15) | 36 (13) | |
| Others | 37 (8) | 19 (7) | |
| Sex | 0.7 | ||
| Women | 329 (72) | 198 (71) | |
| Men | 125 (28) | 80 (29) | |
| Age | 0.7 | ||
| < 65 | 145 (32) | 85 (31) | |
| ≥ 65 | 309 (68) | 193 (69) | |
| Age mean (SD) | 69.4 (11.0) | 70.1 (11.4) | 0.1 |
| Indication for surgery a | 0.4 | ||
| Malunion b | 128 (28) | 66 (24) | |
| Nonunion | 293 (65) | 191 (69) | |
| Caput necrosis | 32 (7) | 20 (7) | |
| Period of surgery | 0.2 | ||
| 2006–2008 | 146 (32) | 76 (27) | |
| 2009–2011 | 139 (31) | 100 (36) | |
| 2012–2015 | 169 (37) | 102 (37) |
a Responders, n = 453. Non-responders, n = 277, stemmed hemi-arthroplasty (SHA), and reverse shoulder arthroplasty (RTSA).
b Malunion includes fractures reported together with osteoarthritis.