Table 1.
Descriptive Statistics for the Early Childhood Household Smoke Exposure Predictor, Gambling Outcome, and Individual and Family Control Variables, Quebec Longitudinal Study of Child Development (1997-1998 Birth Cohort).
| Mean | (SD) | Min-Max | ||
|---|---|---|---|---|
| Independent variable | ||||
| Early childhood household smoke exposurea | 1.84 | (2.66) | 0-7 | |
| (ages 1.5-7.5 years) | 0 = Never exposed 1 = Transiently exposed 2 = Continuously exposed |
59.9% 27.3% 12.8% |
||
| Control variables | ||||
| a. Inattention (age 6 years) | 0 = Below 50th percentile 1 = Above 50th percentile |
53.0% 47.0% |
||
| b. Sex | 0 = Girls 1 = Boys |
48.8% 51.2% |
||
| c. Gestational smoke (5 months) | 0 = Not exposed 1 = Exposed |
74.9% 25.1% |
||
| d. Weight for gestational age | 0 = Above 10th percentile 1 = Below 10th percentile |
91.6% 8.4% |
||
| e. Family configuration (5 months) | 0 = Two parents 1 = Single parent |
92.0% 8.0% |
||
| f. Family functioning (age 1.5 years) | 0 = Normal 1 = Problematic |
83.5% 16.5% |
||
| g. Family income (5 months) | 0 = $30 000 or more 1 = $29 999 or less |
70.5% 29.5% |
||
| h. Maternal education (5 months) | 0 = Completed high school 1 = No high school diploma |
83.9% 16.1% |
||
| i. Maternal depression (5 months) | 0 = No 1 = Yes |
84.9% 15.1% |
||
| j. Parental antisocial behavior (5 months) | 0 = No 1 = Yes |
86.5% 13.5% |
||
| k. Parental gamblinga (age 10 years) | 1.37 | (0.99) | 0-8 | |
| Dependent variable | ||||
| Gambling lifetime participation | ||||
| (age 12 years) | 0 = Never participated 1 = Has participated |
84.3% | ||
| 15.7% | ||||
a
Applies when treated as a continuous variable.