Table 3.
WOMAC Scores: Time × Group Interactiona
| LMW-HA (n = 14 Hips) | LP-PRP (n = 19 Hips) | P Valueb | |||
|---|---|---|---|---|---|
| n | Mean ± SD | n | Mean ± SD | ||
| WOMAC pain | |||||
| 0 wk | 14 | 78.9 ± 14.3 | 19 | 72.1 ± 18.0 | .23 |
| 6 wk | 12 | 80.0 ± 17.1 | 18 | 80.8 ± 12.4 | .89 |
| 12 wk | 13 | 79.2 ± 18.0 | 18 | 80.8 ± 12.0 | .78 |
| 24 wk | 14 | 84.3 ± 14.5 | 18 | 76.1 ± 15.2 | .13 |
| WOMAC joint | |||||
| 0 wk | 14 | 68.8 ± 24.9 | 19 | 55.3 ± 26.5 | .14 |
| 6 wk | 13 | 75.0 ± 23.4 | 18 | 71.5 ± 15.9c | .65 |
| 12 wk | 13 | 71.2 ± 29.5 | 18 | 68.8 ± 19.8 | .80 |
| 24 wk | 14 | 74.1 ± 22.2 | 18 | 72.9 ± 22.8c | .88 |
| WOMAC function | |||||
| 0 wk | 13 | 81.2 ± 12.9 | 18 | 69.6 ± 20.4 | .06 |
| 6 wk | 13 | 83.7 ± 15.2 | 18 | 82.9 ± 12.5c | .88 |
| 12 wk | 13 | 79.1 ± 17.8 | 18 | 80.1 ± 14.8 | .86 |
| 24 wk | 14 | 84.1 ± 15.7 | 18 | 80.2 ± 16.4 | .50 |
| WOMAC overall | |||||
| 0 wk | 13 | 77.9 ± 14.4 | 18 | 67.6 ± 19.7 | .10 |
| 6 wk | 12 | 79.5 ± 16.2 | 18 | 79.7 ± 10.9c | .97 |
| 12 wk | 13 | 77.5 ± 19.0 | 18 | 78.0 ± 13.0 | .93 |
| 24 wk | 14 | 82.1 ± 15.1 | 18 | 77.0 ± 15.8 | .36 |
aLMW-HA, low–molecular weight hyaluronic acid; LP-PRP, leukocyte-poor platelet-rich plasma; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.
bP values compare scores between groups at each time point.
cValue indicates a significant difference (P < .05) compared with the preinjection value.