Table I.
Participant characteristics by status of any CAM use at baseline among older adults with radiographic knee OA
| Characteristics | CAM Users (N=581) | Non-CAM users (N=540) | Total (N=1,121) |
|---|---|---|---|
| Percentage | |||
| Age (≥75 years) | 21.3 | 27.8 | 24.4 |
| Women | 65.1 | 51.7 | 58.6 |
| Ethnicity/Race | |||
| Non-Hispanic White | 82.4 | 82.6 | 82.5 |
| Non-Hispanic Black | 12.7 | 15.6 | 14.1 |
| Other | 4.8 | 1.9 | 3.4 |
| Education | |||
| High school or less | 18.0 | 22.2 | 20.0 |
| Some college | 24.0 | 22.9 | 23.5 |
| College graduate | 21.1 | 21.6 | 21.3 |
| Graduate Degree | 37.0 | 33.3 | 35.2 |
| Income ($) | |||
| <25,000 | 17.0 | 18.7 | 17.8 |
| 25,000 – 50,000 | 36.2 | 36.0 | 36.1 |
| >50,000 | 46.9 | 45.3 | 46.1 |
| Insurance coverage of Rx | 83.0 | 82.2 | 82.7 |
| K-L grade 3 or 4 | 59.2 | 48.9 | 54.2 |
| Symptom-related multi-joint OA | 57.8 | 42.0 | 50.2 |
| Use of analgesics | 48.2 | 33.3 | 41.0 |
| History of knee injury | 43.6 | 39.9 | 41.8 |
| History of knee surgery | 26.3 | 24.1 | 25.3 |
| Body mass index (kg/m2) | |||
| <25 | 21.3 | 17.6 | 19.5 |
| 25 – <30 | 41.5 | 44.3 | 42.8 |
| ≥30 | 37.2 | 38.2 | 37.6 |
| Comorbidity score | |||
| 0 | 71.9 | 68.6 | 70.3 |
| 1 | 15.8 | 16.5 | 16.1 |
| ≥2 | 12.3 | 15.0 | 13.6 |
| Mean (Standard Deviation) | |||
| WOMAC Pain | 4.3 (3.7) | 3.1 (3.5) | 3.8 (3.7) |
| WOMAC Stiffness | 2.4 (1.7) | 1.9 (1.7) | 2.1 (1.7) |
| WOMAC Physical Function | 13.4 (12.1) | 10.4 (11.6) | 12.0 (11.9) |
| SF-12 PCS | 46.7 (8.9) | 48.4 (8.8) | 47.5 (8.9) |
| SF-12 MCS | 55.6 (7.2) | 55.4 (7.2) | 55.5 (7.2) |
K-L grade: Kellgren-Lawrence grade; MCS: Mental Component Summary score; PCS: Physical Component Summary score; Rx: prescription; SF-12: 12-item Short-Form Health Survey; WOMAC: Western Ontario and McMaster Universities Arthritis Index scale.