Table 1. Description of the Sample and Latent Classes.
| Prevalence | Multivariate logistic regressionb | ||||||
|---|---|---|---|---|---|---|---|
| Variables | Full sample | Class 1a | Class 2a | Class 3a | OR (95% CI) classes 1 versus 3 | OR (95% CI) classes 2 versus 3 | OR (95% CI) classes 2 versus 1 |
| Sex (referent = male) | 60.6 | 63.3 | 63.2 | 57.1 | 1.1(0.8;1.4) | 1.0(0.8;1.5) | 1.1(0.8;1.4) |
| Age (mean (sd))c | 57(15.9) | 58.3(17.5) | 56.9(16.0) | 55.3(17.3) | 1.0(0.9;1.1) | 0.9(0.8;1.0) | 0.9(0.8;1.0) |
| Taking medications | 77.9 | 85.8 | 84.2 | 67.9 | 1.8(1.2;2.7) | 1.8(1.3;2.7) | 1.0(0.6;1.7) |
| Hospitalized during past year | 20.5 | 27.2 | 19.2 | 17.3 | 1.2(0.9;1.7) | 0.8(0.6;1.2) | 0.7(0.5;1.0) |
| Has rheumatoid arthritis | 28.0 | 37.4 | 27.9 | 21.9 | 1.2(0.7;2.0) | 1.4(0.9;2.3) | 1.2(0.7;2.1) |
| Has osteoarthritis | 36.6 | 40.7 | 45.5 | 27.9 | 1.5(1.0;2.0) | 2.1(1.4;3.0) | 1.4(1.0;2.1) |
| Has another health condition | 77.3 | 81.1 | 83.6 | 70.6 | 1.3(0.9;1.8) | 1.5(1.1;2.2) | 1.2(0.8;1.9) |
| Self-reported health is fair or poor (referent = good, very good or excellent) | 24.0 | 32.7 | 27.0 | 16.5 | 1.6(1.1;2.3) | 1.5(1.1;2.1) | 0.9(0.7;1.3) |
| Sampling groups | |||||||
| Community-dwelling (referent) | 59.8 | 48.7 | 55.8 | 67.5 | 1.0 | 1.0 | 1.0 |
| Rheumatology clinic sample | 20.4 | 29.7 | 16.7 | 15.7 | 1.4(0.8;2.5) | 0.6(0.3;1.0) | 0.4(0.2;0.7) |
| Awaiting joint replacement surgery sample | 19.8 | 21.6 | 24.5 | 16.8 | 0.9(0.6;1.5) | 0.8(0.5;1.2) | 0.8(0.5;1.4) |
Notes. OR = odds ratio. N = 1,660
a Prevalence computed based on posterior-probability based multiple imputations using the Mplus software. Proportions of latent class membership are .27, 30 and .43 for classes 1, 2 and 3, respectively.
b Odds ratios based on the multinomial logistic regression using pseudo-class draws.
c For each 10-year (decade) increase in age.