| Unadjusted β (95% CI) | Adjusted β (95% CI) | |
| Asthma treatment | −14.45 (−22.90 to −6.01) | −13.57 (−20.70 to −6.44) |
| Parental smoking | −7.16 (−12.74 to −1.58) | −9.17 (−13.80 to −4.53) |
| First visit | −32.61 (−34.42 to −30.81) | −11.87 (−13.86 to −9.88) |
| Winter (Nov–Feb) | −6.24 (−8.01 to −4.46) | 1.31 (−0.13 to 2.75) |
| Height at school visit (cm) | 4.91 (4.69 to 5.12) | 2.59 (2.31 to 2.86) |
| Age at school visit (years) | 28.52 (27.19 to 29.86) | 9.82 (7.92 to 11.72) |
| Day of the week | ||
| Mon | 0 | 0 |
| Tues | 4.38 (3.45 to 5.32) | 4.51 (3.56 to 5.45) |
| Wed | 5.93 (4.90 to 6.97) | 6.20 (5.15 to 7.26) |
| Thurs | 6.16 (5.10 to 7.22) | 6.52 (5.43 to 7.61) |
| Fri | 7.69 (6.49 to 8.88) | 7.89 (6.68 to 9.11) |
| OTS | 35.79 (33.66 to 37.91) | 5.52 (3.08 to 7.97) |
OTS, Oxford Transport Strategy.