Table 2.
Characteristics of participants with radiographic confirmed knee osteoarthritis by conventional and CAM treatment approaches (N=2,679)
| Conventional Medications Only (N=440) | CAM Use ONLY (N=618) | Both (N=641) | Neither (N=980) | |
|---|---|---|---|---|
| Percentage * (95% Confidence Intervals &) | ||||
| Women | 59.6 (55.0–64.1) | 60.5 (56.7–64.4) | 66.6 (63.0–70.3) | 51.0 (47.9–54.2) |
| Age (years): ≥ 65 | 41.4 (36.8–46.0) | 45.2 (41.2–49.1) | 44.3 (40.5–48.2) | 42.4 (39.3–45.4) |
| Race/ethnicity: | ||||
| White | 68.9 (64.5–73.2) | 81.2 (78.2–84.3) | 77.0 (73.8–80.3) | 79.3 (76.7–81.8) |
| Black/African American | 28.6 (24.4–32.9) | 13.6 (10.9–16.3) | 19.8 (16.8–22.9) | 17.5 (15.1–19.8) |
| Latino | 1.4 (0.3–2.4) | 1.1 (0.3–2.0) | 1.9 (0.8–2.9) | 1.3 (0.6–2.0) |
| Other | 1.1 (0.1–2.1) | 4.1 (2.5–5.6) | 1.3 (0.4–2.1) | 1.9 (1.1–2.8) |
| Education: > College | 45.0 (40.3–49.6) | 63.0 (59.2–66.8) | 52.1 (48.2–56.0) | 57.6 (54.5–60.7) |
| Some college | 28.9 (24.6–33.2) | 23.0 (19.6–26.3) | 29.8 (26.2–33.3) | 24.4 (21.7–27.1) |
| ≤ High school | 26.2 (22.0–30.3) | 14.0 (11.3–16.8) | 18.1 (15.1–21.1) | 18.0 (15.6–20.4) |
| Income ($): > 100,000 | 17.7 (14.0–21.4) | 21.6 (18.2–24.9) | 22.7 (19.3–26.1) | 22.3 (19.6–25.0) |
| 50k – 100k | 32.4 (27.9–37.0) | 38.4 (34.5–42.4) | 31.8 (28.0–35.6) | 38.3 (35.2–41.5) |
| 25k – 50k | 27.8 (23.4–32.1) | 28.0 (24.3–31.7) | 28.7 (25.1–32.4) | 25.8 (23.0–28.6) |
| ≤25,000 | 22.1 (18.1–26.1) | 12.0 (9.3–14.7) | 16.8 (13.7–19.8) | 13.6 (11.4–15.8) |
| Married/partnered | 61.5 (56.9–66.0) | 70.0 (66.4–73.6) | 63.5 (59.8–67.3) | 66.4 (63.4–69.3) |
| Working (for pay) | 54.2 (49.6–58.9) | 61.3 (57.5–65.2) | 55.5 (51.6–59.4) | 60.2 (57.2–63.3) |
| Health insurance | 92.9 (90.4–95.3) | 97.7 (96.5–98.9) | 97.2 (95.9–98.5) | 97.6 (96.7–98.6) |
| Insurance covers prescriptions | 84.7 (81.2–88.1) | 86.0 (83.2–88.7) | 87.0 (84.4–89.6) | 88.6 (86.5–90.6) |
| Body mass index (kg/m2) | ||||
| ≥ 35 (morbidly obese) | 19.2 (15.5–22.9) | 8.3 (6.1–10.4) | 17.3 (14.4–20.3) | 12.0 (10–14.1) |
| 30 – <35 (obese) | 34.0 (29.6–38.5) | 30.0 (26.4–33.6) | 28.9 (25.4–32.4) | 29.1 (26.2–31.9) |
| 25 – <30 (overweight) | 36.5 (32.0–41.0) | 40.4 (36.5–44.2) | 35.3 (31.6–39.0) | 41.5 (38.4–44.6) |
| <25 (normal) | 10.3 (7.4–13.1) | 21.4 (18.2–24.6) | 18.4 (15.4–21.4) | 17.4 (15.0–19.7) |
| CES-D > 16 (Depressed) | 15.0 (11.7–18.3) | 5.8 (4.0–7.7) | 12.0 (9.5–14.5) | 7.1 (5.5–8.8) |
| mean (standard deviation) | ||||
| SF-12 Mental Summary | 52.7 (9.7) | 54.7 (7.3) | 53.8 (8.9) | 53.9 (7.5) |
| SF-12 Physical Summary | 44.3 (10.1) | 48.8 (8.8) | 44.1 (9.6) | 50.7 (8.3) |
*
May not total 100% due to rounding.
&
Confidence intervals were calculated based on asymptotic Gaussian approximation