Table 2.
Tracking of medicine use from 1 month to 15 years of age—1993 Pelotas (Brazil) Birth Cohort Study
| Follow-up visit | Medicine use in the previous follow-up visit |
Unadjusteda |
Adjustedb |
|||
|---|---|---|---|---|---|---|
| No (%) | Yes (%) | OR (95% CI) | p | OR (95% CI) | p | |
| 3 monthsc | 57.5 | 74.6 | 2.17 (1.54–3.07) | <.001 | 2.11 (1.49–2.99) | <.001 |
| 6 months | 49.5 | 62.5 | 1.70 (1.21–2.39) | .002 | 1.80 (1.28–2.55) | .001 |
| 1 year | 44.4 | 57.8 | 1.72 (1.38–2.14) | <.001 | 1.73 (1.39–2.16) | <.001 |
| 4 years | 30.1 | 39.5 | 1.52 (1.20–1.92) | <.001 | 1.45 (1.15–1.84) | .002 |
| 11 years | 29.1 | 37.4 | 1.45 (1.13–1.88) | .004 | 1.39 (1.06–1.84) | .017 |
| 15 years | 32.4 | 47.8 | 1.91 (1.67–2.18) | <.001 | 1.92 (1.68–2.22) | <.001 |
CI = confidence interval; OR = odds ratio.
Unadjusted: In these analyses, medicine use in each study was compared with medicine use in the previous period. For example, at 3 months, children who used medicines at the first month of life had a chance to use medicine 2.17-fold higher than children who did not use medicine at the first month.
Adjusted: Analyses adjusted for sex, maternal schooling, and family income at the time of the birth to studies from 3 months to 4 years. For 11- and 15-year follow-up visits, analyses were adjusted for sex (perinatal data), maternal education at 15 years and asset index at 11 and 15 years.
The 3-month study was compared with the 1-month study.