Table 1.
Preoperative characteristics of 21 subjects randomized to a postoperative exercise intervention or usual care following primary total hip arthroplasty
|
Intervention |
Control |
P-value | |
|---|---|---|---|
| (n = 11) | (n = 10) | ||
|
Demographics
|
|
|
|
| Mean age (SD) |
51.7 (8.3) |
55.9 (9.9) |
0.30 |
| Number of females n (%) |
7 (64) |
3 (30) |
0.20 |
| Working full time n (%) |
7 (64) |
8 (80) |
0.11 |
|
Performance-based measures
|
|
|
|
| Strength in pounds of force |
|
|
|
| Mean hip flexion (SD) |
25.3 (8.5) |
28.6 (7.0) |
0.37 |
| Mean hip extension (SD) |
21.3 (7.2) |
28.1 (13.7) |
0.21 |
| Mean hip external rotation (SD) |
13.8 (5.0) |
16.8 (5.5) |
0.22 |
| Mean hip internal rotation (SD) |
13.1 (3.4) |
16.3 (5.7) |
0.16 |
| Mean abduction (SD) |
22.1 (8.3) |
24.5 (6.7) |
0.50 |
| Mean six minute walk test in meters (SD) |
402.2 (291.4) |
472.2 (373.0)** |
0.65 |
|
Self- report measures
|
|
|
|
| WOMAC* |
|
|
|
| Mean pain score (SD) |
46.0 (12.4) |
55.6 (13.2) |
0.13 |
| Mean function score (SD) |
51.0 (14.8) |
55.1 (14.0) |
0.56 |
| RAND-36* |
|
|
|
| Mean physical function score (SD) |
27.8 (13.9) |
40.0 (23.3)** |
0.20 |
| Mean physical role score (SD) |
13.9 (25.3) |
43.8 (37.2)** |
0.07 |
| Mean bodily pain score (SD) |
26.5 (14.4) |
34.9 (12.9) |
0.22 |
| Mean general health appendix score (SD) |
78.3 (16.5) |
79.0 (19.9) |
0.94 |
| Mean vitality score (SD) |
48.5 (17.0) |
53.8 (23.3) |
0.59 |
| Mean emotional role score (SD) |
63.3 (42.9) |
87.5 (24.8)** |
0.09 |
| Mean social function score (SD) |
53.8 (32.3) |
75.0 (14.9)** |
0.16 |
| Mean mental health score (SD) | 76.4 (15.8) | 83.0 (11.7) | 0.34 |
Legend: SD = Standard Deviation; WOMAC = Western Ontario McMaster Osteoarthritis Index; RAND-36 = RAND 36-Item Health Survey.
*Scores are rated as 0 = no health limitation – 100 = maximal health limitation.
**Exceeds clinically important difference.