Table 2.
Frequency of meeting aerobic Physical Activity Guidelines among adults with and at risk for radiographic knee osteoarthritis (RKOA)
| With RKOA | At risk for RKOA | |||
|---|---|---|---|---|
| Characteristics | Sample Size |
% Met DHHS 2008 Physical Activity Guidelines |
Sample Size |
% Met DHHS 2008 Physical Activity Guidelines |
| n | % (95% CI) | n | % (95% CI) | |
| Overall | 1142 | 10.4 (8.6, 12.2) | 747 | 11.8 (9.5, 14.1) |
| Socio-demographic Factors | ||||
| Race/ethnicity | ||||
| African American | 206 | 1.9 (0.0, 3.8) | 80 | 2.3 (0.6, 8.3) |
| White | 936 | 12.7 (10.6, 14.8) | 667 | 13.4 (10.8, 16.0) |
| Age in years | ||||
| 49–64 | 518 | 14.0 (11.0, 17.0) | 411 | 12.2 (9.0, 15.4) |
| ≥ 65 | 624 | 7.5 (5.4, 9.6) | 336 | 11.2 (7.8, 14.6) |
| Gender | ||||
| Male | 516 | 13.8 (10.8, 16.8) | 335 | 15.7 (11.8, 19.6) |
| Female | 626 | 7.9 (5.8, 10.0) | 412 | 9.1 (6.3, 11.9) |
| Education | ||||
| 0–12 yrs or missing | 173 | 5.0 (1.8, 8.2) | 77 | 8.8 (2.5, 15.1) |
| 13+ yrs | 969 | 11.6 (9.6, 13.6) | 670 | 12.2 (9.7, 14.7) |
| Income | ||||
| < $50k | 375 | 5.2 (3.0, 7.4) | 226 | 7.1 (3.8, 10.4) |
| ≥ $50k | 710 | 13.8 (11.3, 16.3) | 501 | 14.1 (11.1, 17.1) |
| Unknown | 57 | 9.7 (2.0, 17.4) | 20 | 23.2 (4.7, 41.7) |
| Health Factors | ||||
| Presence of comorbidity | ||||
| Yes | 443 | 6.7 (4.4, 9.0) | 260 | 7.5 (4.3, 10.7) |
| No | 699 | 12.8 (10.3, 15.3) | 487 | 14.9 (11.7, 18.1) |
| Depressive symptoms | ||||
| High | 126 | 4.9 (1.1, 8.7) | 96 | 2.7 (0.9, 7.4) |
| Low | 1016 | 11.2 (9.3, 13.1) | 651 | 14.0 (11.3, 16.7) |
| BMI Status | ||||
| Normal† | 226 | 18.6 (13.5, 23.7) | 253 | 18.2 (13.4, 23.0) |
| Overweight†† | 455 | 13.6 (10.5, 16.7) | 288 | 9.7 (6.3, 13.1) |
| Obese††† | 461 | 3.9 (2.1, 5.7) | 206 | 7.9 (4.2, 11.6) |
| Severe knee pain* | ||||
| Yes | 58 | 1.8 (0.4, 7.3) | 17 | 0.0 |
| No | 1084 | 10.9 (9.0, 12.8) | 730 | 12.5 (10.1, 14.9) |
†
Normal body mass index (BMI): 18.5–24.9 (includes 6 participants with BMI 17.2–18.4),
††
Overweight BMI: 25.0–29.9,
†††
Obese BMI: ≥ 30
*
Severe knee pain was classified as severe (score ≥ 10.9, based on the average score among adults with end-stage knee OA awaiting total knee replacement48) versus not severe.