Table 2.
Parent-Reported Smoking and Child SHSe Outcomes at Baseline and Follow-up
| Variable | Baseline | 3 Months | 6 Months | 9 Months | 12 Months |
|---|---|---|---|---|---|
| Geometric Mean* (95% C.I.) | |||||
| Reported Smoking (cigarettes per week) | |||||
| Intervention | 30.6 (20.0, 46.4) | 8.5 (4.7, 14.7) | 7.6 (4.3, 13.0) | 7.2 (3.9, 12.8) | 11.5 (6.7, 19.3) |
| Control | 25.3 (15.1, 41.9) | 15.2 (8.6, 26.4) | 15.6 (8.5, 27.8) | 12.0 (6.6, 21.4) | 13.2 (7.3, 23.3) |
| Reported Exposure (cigarettes per week) | |||||
| Intervention | 13.0 (8.4, 19.8) | 2.9 (1.7, 4.7) | 3.3 (1.8, 5.5) | 3.3 (1.8, 5.5) | 4.0 (2.4, 6.4) |
| Control | 9.5 (5.7, 15.4) | 6.1 (3.6, 10.1) | 5.8 (3.4, 9.5) | 4.1 (2.2, 7.1) | 4.5 (2.5, 7.7) |
| Child Cotinine Levels (ng/ml) | |||||
| Intervention | 3.9 (2.9, 5.3) | 3.9 (2.8, 5.5) | 3.8 (2.5, 5.7) | 5.3 (3.7, 7.5) | 4.0 (2.9, 5.6) |
| Control | 3.7 (2.4, 5.5) | 3.5 (2.3, 5.3) | 3.1 (2.1, 4.6) | 3.6 (2.4, 5.4) | 3.9 (2.6, 6.0) |
*
Prior to and after calculating geometric mean, 1 was added and then subtracted to the cigarettes smoked or exposed since there were 0 exposures. This method43 has been confirmed by simulation.