Table 3. Separate recent smoking aggregate models.
| Predictor | Model names | ||
|---|---|---|---|
|
| |||
| Model 1 Smoking not wronga OR (95% CI) | Model 2 Smoking coola OR (95% CI) | Model 3 Friends who smokea OR (95% CI) | |
| Individual variables | |||
| RCSG | |||
| Black | 1.00 | 1.00 | 1.00 |
| Coloured | 1.05 (0.78–1.26) | 1.09 (0.83–1.28) | 1.00 (0.69–1.24) |
| White | 1.01 (0.26–1.26) | 1.06 (0.75–1.28) | 0.87 (0.53–1.18) |
| Smoking not wrong? | |||
| Wrong | 1.00 | – | – |
| A little wrong | 1.36 (1.20–1.47)b | – | – |
| Not wrong at all | 1.44 (1.29–1.53)b | – | – |
| Smoking cool? | |||
| No or little chance | – | 1.00 | – |
| Some chance | – | 0.98 (0.85–1.28) | – |
| Pretty good chance | – | 1.19 (1.06–1.30)b | – |
| Friends who smoke | |||
| Zero–two | – | – | 1.00 |
| Three | – | – | 1.20 (0.90–1.47) |
| Four | – | – | 1.71 (1.58–1.80)b |
| Aggregate variables | |||
| Smoking not wrong? | |||
| Low | 1.00 | – | – |
| Medium | 1.03 (0.81–1.18) | – | – |
| High | 0.97 (0.73–1.15) | – | – |
| Smoking cool? | |||
| Low | – | 1.00 | – |
| Medium | – | 0.90 (0.69–1.07) | – |
| High | – | 0.90 (0.67–1.08) | – |
| Number of friends who smoke | |||
| Low | – | – | 1.00 |
| Medium | – | – | 0.95 (0.66–1.16) |
| High | – | – | 0.89 (0.59–1.14) |
| Repeating a grade | |||
| Low | 1.00 | 1.00 | 1.00 |
| Medium | 1.18 (0.99–1.32) | 1.16 (0.97–1.31) | 1.21 (1.02–1.35)b |
| High | 1.24 (1.07–1.37)b | 1.23 (1.05–1.35)b | 1.29 (1.14–1.40)b |
Odds of recent smoking (yes)
Odds ratios corrected for common outcome as indicated in Zhang and Yu [26]
a
Adjusted for age, gender, racially classified social group, number of amenities, years of urban residence, repeating a grade, and individual-level variable
b
Significant odds ratio