Table 1.
Characteristics of the 185 Adults from the Physical Activity and Sleep Monitoring Pilot Study of the Osteoarthritis Initiative (OAI) (2012–2014).
| Overall (n=185) | Restless Sleepa | ||
|---|---|---|---|
| % or mean (SD) | No (n=73) % or mean (SD) |
Yes (n=112) % or mean (SD) |
|
| Sociodemographic factors | |||
| Age | 67.1 (8.5) | 67.8 (8.4) | 66.6 (8.6) |
| Female | 49.7 | 48.0 | 50.9 |
| White | 94.1 | 95.9 | 92.9 |
| Income >= $50k | 70.8 | 72.6 | 69.6 |
| Health factors | |||
| Obeseb | 40.5 | 43.8 | 38.4 |
| Presence of comorbidity | 30.3 | 31.5 | 29.5 |
| Kellgren-Lawrence grade | |||
| 0 | 21.6 | 21.9 | 21.4 |
| 1 | 18.9 | 19.2 | 18.8 |
| 2 | 31.4 | 27.4 | 33.9 |
| 3 | 21.1 | 26.0 | 17.9 |
| 4 | 7.0 | 5.5 | 8.0 |
| OA presencec | 59.5 | 58.9 | 59.8 |
| High depressive symptomsd | 6.0 | 4.1 | 7.1 |
| Pain catastrophizing scale | 0.5 (1.0) | 0.3 (0.9) | 0.6 (1.1) |
| Wake and sleep activities (minutes/day) | |||
| Sleep duration | 422.3 (58.6) | 411.2 (55.6) | 429.6 (59.7) |
| Sedentary | 660.9 (88.9) | 666.8 (89.9) | 657.0 (88.5) |
| Light PA | 272.6 (79.7) | 278.2 (82.8) | 269.0 (77.8) |
| Moderate PA | 13.6 (17.5) | 15.4 (19.8) | 12.4 (15.7) |
| Outcomes | |||
| Presence of bodily pain interference | 58.4 | 41.1 | 69.6 |
| Presence of knee pain | 62.7 | 54.8 | 67.9 |
a
Self-report of restless sleep during the past week.
b
Body Mass Index ≥30
c
Kellgren-Lawrence grade ≥ 2
d
High Depressive symptoms as defined by modified Center for Epidemiological Studies Depression Scale ≥16