Table 2.
Time-trends in moderate-severe preoperative pain and functional limitation
| 1993-1995 (n ~ 1,510)* | 1996-1998 (n ~ 1,646)* | 1999-2001 (n ~ 1539)* | 2002-2005 (n ~ 2,480)* | Absolute Difference (period 1 -period 4) | p-value for time-trend | |
|---|---|---|---|---|---|---|
| Preoperative walking limitations | <0.001 | |||||
| None/Mild | 25.7% | 25.9% | 32.2% | 31.4% | ||
| Moderate/Severe | 74.3% | 74.1% | 67.8% | 68.6% | -5.7% | |
| Preoperative stairs limitations | 0.007 | |||||
| None/Mild | 14.4% | 15.5% | 16.7% | 12.7% | ||
| Moderate/Severe | 85.6% | 84.5% | 83.3% | 87.3% | +1.7% | |
| Preoperative chair limitations | <0.001 | |||||
| None/Mild | 58.4% | 65.3% | 71.2% | 76.8% | ||
| Moderate/Severe | 41.6% | 34.7% | 28.8% | 23.2% | -18.4% | |
| Preoperative walking aids | 0.025 | |||||
| No/mild dependence | 70.9% | 71.9% | 72.0% | 75.3% | ||
| Moderate dependence | 18.3% | 16.4% | 16.7% | 15.4% | -2.9% | |
| Complete dependence or unable to walk | 10.8% | 11.7% | 11.3% | 9.3% | -1.5% | |
| Preoperative overall ADL limitations | <0.001 | |||||
| None/Mild | 24.8% | 27.9% | 34.6% | 32.1% | ||
| Moderate/Severe | 75.2% | 72.1% | 65.4% | 67.9% | -7.3% | |
| Preoperative pain | <0.001 | |||||
| None/Mild/Stairs/Stairs and walking | 35.7% | 39.4% | 41.8% | 33.0% | ||
| Moderate/Severe | 64.3% | 60.6% | 58.2% | 67.0% | +2.7% |
ADL, activities of daily living.
*Missingness ranged from 1% to 3% for various variables, since not all the patients answered each question on the survey.