Comparison of selected characteristics of study subjects and children lost to follow up, Montreal, Canada, 1993–1995
| Study subjects (n = 1824) | Children lost to follow up (n = 931) | p | |
|---|---|---|---|
| Male (%) | 50.0 | 50.1 | 0.98 |
| Mean age (SD) (years) | 10.5 (0.8) | 10.6 (0.9) | 0.02 |
| Mean no (SD) persons/household | 4.6 (1.5) | 4.6 (1.7) | 0.90 |
| Two-parent family (%) | 73.4 | 69.4 | 0.03 |
| Born in Canada (%) | |||
| Subject | 64.5 | 53.1 | 0.00 |
| Mother | 27.6 | 24.3 | 0.07 |
| Father | 23.3 | 22.1 | 0.49 |
| Family origin (%) | 0.02 | ||
| Europe | 22.5 | 18.8 | |
| Central America/Caribbean | 21.7 | 19.8 | |
| Canada | 20.8 | 19.5 | |
| Asia | 14.7 | 19.0 | |
| Arabic-speaking countries | 5.2 | 6.4 | |
| South America | 4.6 | 4.5 | |
| Other | 10.6 | 11.8 | |
| Employed (%) | |||
| Father | 84.3 | 83.0 | 0.41 |
| Mother | 66.6 | 59.0 | 0.00 |
| Smoke (%) | |||
| Subject | 21.1 | 20.6 | 0.77 |
| Mother | 25.4 | 25.6 | 0.91 |
| Father | 45.7 | 47.1 | 0.48 |
| Sibling(s) | 10.8 | 12.3 | 0.24 |
| Friends | 26.1 | 27.6 | 0.40 |