Table 2.
Comparison of demographic characteristics of continuing and discontinued participants
| Characteristic | Continuing participants | Discontinuing participants | P value | ||
| n (%) | Become ineligible, n (%) | Lost to follow-up, n (%) | Dropped out, n (%) | ||
| Maternal age | |||||
| 16–24 | 71 (3.6) | 8 (18.6) | 15 (34.8) | 6 (4.1) | <0.001 |
| 25–29 | 424 (16.2) | 7 (16.2) | 7 (16.2) | 43 (29.2) | |
| 30–34 | 899 (46.2) | 15 (34.8) | 14 (32.5) | 51 (34.7) | |
| 35–39 | 454 (23.3) | 9 (20.9) | 7 (16.2) | 41 (27.9) | |
| ≥40 | 95 (4.8) | 4 (9.3) | 0 (0.0) | 6 (4.1) | |
| Marital status | |||||
| Single | 72 (3.8) | 12 (24.5) | 8 (21.1) | 5 (3.8) | 0.007 |
| Married | 1838 (96.2) | 37 (75.5) | 30 (78.9) | 128 (96.2) | |
| Maternal education | |||||
| Less than a high school diploma | 41 (2.2) | 6 (16.2) | 8 (20.5) | 4 (3.01) | <0.001 |
| Completed high school diploma | 164 (8.6) | 9 (24.3) | 9 (23.1) | 20 (15.0) | |
| Completed trade, technical diploma | 362 (19.1) | 5 (13.5) | 10 (25.6) | 26 (19.5) | |
| Completed university or more | 1329 (70.1) | 17 (45.9) | 12 (30.6) | 83 (62.4) | |
| Household income | |||||
| <$40 000 | 151 (8.1) | 12 (30.8) | 19 (54.3) | 8 (6.15) | <0.001 |
| $40 000–$60 000 | 252 (13.4) | 6 (15.4) | 5 (14.3) | 16 (12.31) | |
| $70 000–$99 999 | 428 (22.8) | 7 (17.9) | 4 (11.4) | 24 (18.46) | |
| ≥$100 000 | 1042 (55.6) | 14 (35.9) | 7 (20.0) | 82 (63.08) | |
| Born in Canada | |||||
| No | 425 (22.5) | 13 (32.5) | 14 (37.8) | 28 (21.2) | 0.186 |
| Yes | 1463 (77.5) | 27 (67.5) | 23 (62.2) | 104 (78.8) | |
Assessing the null hypothesis that there is no difference in distributions between those participants who continued and those who did not continue in the study; χ2 test.