12 Months | 24 Months | |||
---|---|---|---|---|
Status | Missing(n = 37) | Present(n = 151) | Missing(n = 74) | Present(n = 114) |
t-Test and χ2 tests used to compare missing to nonmissing | ||||
* Baseline MCS scores for 24 month missing vs nonmissing, P = .04; all other P values > .10 | ||||
SD = standard deviation; PCS = physicial functioning and MCS = emotional functioning subscales of Short Form-36 | ||||
Age, years | 48.5 (14.0) | 47.1 (13.9) | 45.5 (14.2) | 48.6 (1.3) |
Mean (SD) | ||||
% Minority | 19 | 19 | 18 | 20 |
% Male | 8 | 7 | 8 | 7 |
Hollingshead social class | 3.6 (1.0) | 3.5 (1.0) | 3.4 (1.0) | 3.5 (1.0) |
Mean (SD) | ||||
% with physical comorbidity | 73 | 66 | 66 | 68 |
% with psychiatric comorbidity | 49 | 38 | 43 | 39 |
Baseline PCS scores | 44.5 (12.4) | 43.0 (11.3) | 44.9 (11.6) | 42.9 (11.5) |
Mean (SD) | ||||
Baseline MCS scores* | 48.2 (10.0) | 48.9 (9.0) | 47.0* (10.2) | 49.9* (8.3) |
Mean (SD) | ||||
% year 1 intervention | 41 | 50 | 45 | 51 |