Table 1:
Subject characteristics
| Subject Characteristics | n=162 |
|---|---|
| Age (mean±SD) | 63.25±8.3 |
| Gender | |
| Females [n (%)]* | 103 (63.6) |
| Males [n (%)]* | 59 (36.4) |
| Body mass index (kg/m2) | |
| Index visit (mean±SD) | 29.4±3.9 |
| 4 year follow-up (mean±SD) | 29.9±4.5 |
| Weight change (Index visit – 4 year follow-up) | |
| Weight-loss over 10% [n (%)]* | 10 (6.2) |
| Weight-loss between 5%−10% [n (%)]* | 10 (6.2) |
| Stable weight [n (%)]* | 104 (64.2) |
| Weight-gain between 5%-10% [n (%)]* | 24 (13.8) |
| Weight-gain over 10% [n (%)]* | 14 (8.6) |
| Physical Activity Score for the Elderly (PASE) | |
| Index visit (mean±SD) | 169.5±83.0 |
| 4 year follow-up (mean±SD) | 151.3±82.3 |
| Race | |
| Caucasian [n (%)] * | 138 (85.2) |
| African American [n (%)] * | 23 (14.2) |
| Asian [n (%)]* | 0(0) |
| Other nonwhite [n (%)]* | 1 (0.6) |
| Family history of knee replacement [n (%)]* | 25 (15.4) |
| Diabetes Mellitus at baseline [n (%)]* | 7 (4.3) |
| High blood pressure at baseline [n (%)]* | 28 (17.3) |
| Injury index knee | |
| Before index visit [n (%)]* | 36 (22.2) |
| 2 years before index visit [n (%)]* | 11 (6.8) |
| During follow-up period [n (%)]* | 60 (37.0) |
| Surgery index knee | |
| Before index visit [n (%)]* | 6 (3.7) |
| 2 years before index visit [n (%)]* | 0(0) |
| During follow-up period [n (%)]* | 43 (26.5) |
| WOMAC knee pain index knee | |
| Index visit (mean±SD) | 2.18±2.87 |
| 4 year follow-up (mean±SD) | 3.15±3.48 |
*
Data are number of knees, with percentage in parentheses