Table 2.
Unadjusted incidence rates for functional transitions per 1000 person-months.a
| Non-depressed Rate (95% Cl)b |
Depressed Rate (95% Cl)b |
p-value | |
|---|---|---|---|
| Transition | |||
| No disability to: | |||
| Mild | 32.2 (29.4, 34.7) | 57.8 (49.7, 65.3) | <0.001 |
| Severe | 6.0 (5.4, 6.6) | 10.5 (8.8, 12.3) | <0.001 |
| Death | 2.1 (1.8, 2.4) | 2.8 (1.9, 3.6) | 0.14 |
| Person-months at risk | 45,593 | 7,684 | |
| Transition | |||
| Mild disability to: | |||
| None | 215.9 (198.5, 234.2) | 140.1 (122.8, 160.1) | <0.001 |
| Severe | 87.7 (78.0, 96.6) | 99.2 (83.6, 114.9) | <0.001 |
| Death | 9.5 (7.5, 11.3) | 8.1 (5.7, 10.7) | 0.99 |
| Person-months at risk | 5,879 | 2,532 | |
| Transition | |||
| Severe disability to: | |||
| None | 39.5 (33.4, 46.2) | 13.7 (9.7, 18.0) | <0.001 |
| Mild | 153.2 (137.2, 173.0) | 124.5 (104.9, 143.4) | 0.50 |
| Death | 37.9 (32.8, 43.8) | 24.7 (20.7, 29.5) | 0.09 |
| Person-months at risk | 2,889 | 1,815 | |
CI=Confidence Interval
a
The median length of follow-up was 109 months.
b
The confidence intervals for the unadjusted incidence rates were calculated by bootstrapping samples with replacement and provide non-parametric estimates of the rates and their dispersion.