| |
Cotinine-to-creatinine ratio (μg/mmol) with log e transformation
|
|---|
| |
B
|
SE
|
z
|
p> |z|
|
95% CI
|
|---|
|
Household smoking
| | | | | | |
|
Smoking outside the home
|
Ref.
| | | | | |
|
Smoking inside the home
|
1.42
|
0.33
|
4.32
|
< .001
|
.77
|
2.07
|
|
Infant's sex and age
| | | | | | |
|
Male
|
Ref.
| | | | | |
|
Female
|
.79
|
0.26
|
3.01
|
< .01
|
.28
|
1.31
|
|
Age (month)
|
-.03
|
0.01
|
-2.02
|
< .05
|
-.06
|
-.00
|
|
Study day
|
.03
|
0.03
|
1.02
|
.31
|
-.03
|
.08
|
- Generalized estimation equation model to predict the infants' cotinine-to-creatinine ratio (CCR), taking into account cluster correlation within subjects across study days. Model is based on an exchangeable correlation structure for repeated observations within subjects. Predictor variable household smoking was adjusted for infants' age and sex and for study day. Wald chi2 (4) = 40.53, scale parameter = .64. Explained variance of the GEE model was 67.5 percent.
