| TV viewing at 3.5 years of age | Asthma at 11.5 years of age | ||
| All | Boys | Girls | |
| 6.0 (185/3065) | 6.1 (88/1436) | 6.0 (97/1629) | |
| n = 3002 | n = 1401 | n = 1601 | |
| Not at all, % (n) | 5.0 (4/80) | 4.8 (2/42) | 5.3 (2/38) |
| Crude OR (95% CI) | 0.9 (0.3 to 2.5) | 0.9 (0.2 to 3.7) | 0.9 (0.2 to 4.0) |
| Restricted OR (95% CI)* | 0.6 (0.1 to 2.3) | 0.5 (0.07 to 3.8) | 0.6 (0.08 to 4.5) |
| Adjusted OR (95% CI) BMI† | 0.8 (0.2 to 2.6) | 0.5 (0.1 to 3.8) | 1.1 (0.3 to 4.9) |
| Adjusted OR (95% CI)‡ | 0.5 (0.1 to 2.2) | 0.5 (0.06 to 3.4) | 0.6 (0.08 to 4.9) |
| <1 h/day, % (n) | 4.2 (36/850) | 4.4 (16/364) | 4.1 (20/486) |
| Crude OR (95% CI) | 0.8 (0.5 to 1.1) | 0.8 (0.4 to 1.4) | 0.7 (0.4 to 1.2) |
| Restricted OR (95% CI) | 0.7 (0.5 to 1.1) | 0.7 (0.4 to 1.4) | 0.7 (0.4 to 1.3) |
| Adjusted OR (95% CI) BMI | 0.7 (0.5 to 1.2) | 0.7 (0.4 to 1.4) | 0.8 (0.4 to 1.4) |
| Adjusted OR (95% CI) | 0.7 (0.44 to 1.1) | 0.7 (0.4 to 1.4) | 0.7 (0.3 to 1.3) |
| 1–2 h/day, % (n) | 5.6 (78/1394) | 5.6 (37/666) | 5.6 (41/728) |
| Reference category | 1.00 | 1.00 | 1.00 |
| >2 h/day, % (n) | 9.0 (61/678) | 8.8 (29/329) | 9.2 (32/349) |
| Crude OR (95% CI) | 1.7 (1.2 to 2.4) | 1.6 (1.0 to 2.7) | 1.7 (1.1 to 2.7) |
| Restricted OR (95% CI) | 1.8 (1.2 to 2.6) | 1.6 (0.9 to 2.8) | 2.0 (1.2 to 3.4) |
| Adjusted OR (95% CI) BMI | 1.8 (1.3 to 2.7) | 1.8 (1.1 to 3.1) | 1.9 (1.1 to 3.1) |
| Adjusted OR (95% CI) | 1.8 (1.2 to 2.6) | 1.7 (1.0 to 3.0) | 1.9 (1.1 to 3.3) |
| p for linear trend | 0.0003 | 0.02 | 0.005 |
*Univariable analysis restricted to sample in multivariable (fully adjusted model) (n = 2305).
†Adjusted for body mass index (quartiles) at 11.5 years only (n = 2471).
‡Adjusted for body mass index (quartiles) at 11.5 years, maternal asthma/allergies, maternal smoking during pregnancy and maternal housing inadequacy, financial difficulties, low educational attainment, psychopathology of mother and lack of social network practical support during pregnancy (n = 2305).