Table 3.
Unadjusted and adjusted odds ratios for ever drinking alcohol: 2050 middle school students, Tracy, CA, 2003
| Unadjusted ORa (95% CI) | Adjusted ORb (95% CI) | % ever used alcohol | |
|---|---|---|---|
| Grade level | |||
| 6th Grade | 14.6 | ||
| 7th Grade | 2.1 (1.6,2.7) | 1.5 (1.1,2.1) | 26.1 |
| 8th Grade | 4.1 (3.2,5.2) | 2.4 (1.7,3.2) | 41.0 |
| Gender | |||
| Female | 26.5 | ||
| Male | 1.1 (0.9,1.4) | 0.9 (0.7,1.1) | 29.1 |
| Ethnicity | |||
| Non-Hispanic, white | 25.0 | ||
| Latino/Hispanic | 1.4 (1.1,1.7) | 1.4 (1.0,1.9) | 31.3 |
| Other/unknown | 1.0 (0.8,1.3) | 1.3 (0.9,1.8) | 25.5 |
| Self-reported grades | |||
| Above median | 21.2 | ||
| Below median | 2.0 (1.6,2.4) | 1.1 (0.9,1.4) | 34.8 |
| Exposure to parent alcohol use | |||
| No | 20.6 | ||
| Yes | 2.3 (1.9,2.8) | 1.8 (1.4,2.3) | 37.8 |
| At least one friend drinks alcohol | |||
| No | 13.2 | ||
| Yes | 7.2 (5.9,8.9) | 3.3 (2.6,4.3) | 52.3 |
| Maternal supervision | |||
| Above median | 21.3 | ||
| Below median | 1.7 (1.4,2.1) | 1.2 (0.9,1.6) | 31.3 |
| Risk-taking | |||
| Below median | 10.0 | ||
| Above median | 6.8 (5.4,8.7) | 3.3 (2.5,4.4) | 43.2 |
| After school supervision | |||
| Above median | 19.4 | ||
| Below median | 2.5 (2.0,3.0) | 1.4 (1.1,1.7) | 37.5 |
| Retail ad exposure (at least once/week) | |||
| No | 16.1 | ||
| Yes | 2.6 (2.1,3.3) | 1.5 (1.1,2.0) | 33.6 |
| Owns alcohol promotional item | |||
| No | 19.3 | ||
| Yes | 6.7 (5.3,8.4) | 3.3 (2.5,4.3) | 61.5 |
Note. The first category of each variable is the referent category. CI = confidence interval; OR = odds ratio.
a
Unadjusted odds ratio is the bivariate relationship between each study variable and the outcome variable.
b
Adjusted odds ratio from logistic regression.