Table 3 Baseline characteristics of participants with knee replacement based on minimal important change in self-reported physical function
From: Functional outcomes following knee replacement in community-dwelling older adults
|  | Worsened PCS (PCS change < -2.7) n = 145 | Stable PCS (PCS change -2.7 to 2.7) n = 135 | Improved PCS (PCS change ≥ 2.7) n = 316 | P |
|---|---|---|---|---|
Age at joint replacement, years | 77.6 (4.8) | 77.1 (3.8) | 76.5 (3.9) | 0.02 |
 < 75 years, n (%) | 53 (36.6) | 50 (37.0) | 139 (44.0) | 0.20 |
 ≥ 75 years, n (%) | 92 (63.4) | 85 (63.0) | 177 (56.0) | |
Females, n (%) | 92 (63.5) | 76 (56.3) | 181 (57.3) | 0.38 |
Education > 12 years, n (%) | 52 (35.9) | 41 (30.4) | 117 (37.0) | 0.39 |
Body mass index, kg/m2 | 30.1 (5.1) | 29.7 (4.7) | 30.0 (4.9) | 0.77 |
Diabetes, n (%) | 19 (13.1) | 12 (8.9) | 29 (9.2) | 0.38 |
Dyslipidemia, n (%) | 99 (68.3) | 88 (65.2) | 228 (72.2) | 0.31 |
Hypertension, n (%) | 113 (77.9) | 105 (77.8) | 253 (80.1) | 0.80 |
Chronic kidney disease, n (%) | 37 (27.4) | 37 (30.1) | 72 (24.8) | 0.53 |
Cancer, n (%) | 30 (20.7) | 25 (18.5) | 65 (20.6) | 0.95 |
PCS | 45.7 (9.0) | 44.7 (10.0) | 36.1 (9.6) |  < 0.0001 |
MCS | 55.0 (8.2) | 55.7 (8.1) | 57.9 (8.2) | 0.0004 |
Physical function | 45.1 (10.7) | 44.2 (11.0) | 37.0 (10.4) |  < 0.0001 |
Role physical | 48.9 (8.9) | 48.2 (9.2) | 41.9 (9.7) |  < 0.0001 |
Bodily pain | 45.8 (9.9) | 44.7 (11.4) | 37.5 (10.2) |  < 0.0001 |
General health | 51.0 (7.8) | 51.2 (8.9) | 47.8 (9.4) | 0.0001 |
Vitality | 53.1 (9.5) | 54.5 (9.3) | 50.7 (9.1) | 0.0002 |
Social functioning | 52.9 (7.6) | 52.3 (8.6) | 50.8 (9.3) | 0.03 |
Role emotional | 50.5 (8.7) | 50.3 (8.4) | 50.0 (9.1) | 0.81 |
Mental health | 53.2 (8.4) | 53.8 (9.1) | 54.8 (7.8) | 0.15 |
Gait speed, m/sec | 0.98 (0.21) | 0.97 (0.23) | 0.97 (0.21) | 0.92 |