Table 2. Comparison of Prevalent Scores of 8 or More on the Center for Epidemiologic Studies Depression 10-Item Scale at Follow-up in Aspirin and Placebo Groupsa.
| Year | Patients, No. | Aspirin group, No. (%) | Placebo group, No. (%) | Odds ratiob (95% CI) |
|---|---|---|---|---|
| Baseline | 19 110 | 925 (9.7) | 954 (9.9) | NA |
| 1 | 18 100 | 1454 (16.1) | 1424 (15.7) | 1.06 (0.96-1.18) |
| 2 | 7132 | 566 (16.0) | 539 (15.0) | 1.09 (0.94-1.24) |
| 3 | 15 170 | 1316 (17.4) | 1307 (17.1) | 1.06 (0.95-1.17) |
| 4 | 10 409 | 868 (16.9) | 903 (17.1) | 1.04 (0.92-1.17) |
| 5 | 7257 | 663 (18.5) | 675 (18.4) | 1.05 (0.92-1.19) |
| 6 | 2708 | 257 (19.0) | 245 (18.1) | 1.13 (0.94-1.34) |
Abbreviation: NA, not applicable.
a
P value and (test statistic) for intervention by follow-up (annual visit) interaction test: χ26, 2.68; P = .85.
b
Odds ratio comparing aspirin with placebo at follow-up annual visit, divided by the odds ratio comparing the 2 groups at baseline.