Table 2.
Moderately preterm birth (32-36 completed weeks) and levels of sports activity, outdoor activity and sedentary activity at 9-11 years of age. The Aarhus Birth Cohort, Denmark 1989-1991, N = 4941
| Moderately preterm birth n (%) 158 (3.2) | Total na 4941 | OR | OR 95% CI | |
|---|---|---|---|---|
| Participating in sports during the week | ||||
| No | 29 (3.3) | 872 | 1.00 (ref) | 1.00 (ref) |
| Yes | 129 (3.2) | 4069 | 0.95 | 1.03 (0.67-1.58) |
| Sports activity: number of days per week | ||||
| 0 | 29 (3.3) | 872 | 1.00 (ref) | 1.00 (ref) |
| 1 | 29 (2.6) | 1116 | 0.78 | 1.26 (0.60-2.65) |
| 2 | 51 (3.3) | 1559 | 0.98 | 1.02 (0.49-2.16) |
| 3 | 36 (3.8) | 947 | 1.15 | 1.37 (0.68-2.75) |
| ≥ 4 | 13 (2.9) | 447 | 0.87 | 1.63 (0.80-3.35) |
| Outdoor activity: hours per week | ||||
| 0-3 | 23 (2.8) | 812 | 1.00 (ref) | 1.00 (ref) |
| 4-6 | 37 (3.2) | 1162 | 1.13 | 1.01(0.59-1.74) |
| 7-13 | 55 (3.2) | 1704 | 1.14 | 1.02 (0.61-1.70) |
| 14-20 | 27 (3.3) | 830 | 1.15 | 0.93 (0.52-1.67) |
| 21-60 | 7 (3.4) | 207 | 1.20 | 0.88(0.35-2.22) |
| Children with very low level physical activity levels | ||||
| Yes | 6 (2.4) | 247 | 1.00 (ref) | 1.00 (ref) |
| No | 152 (3.2) | 4694 | 1.34 | 1.36 (0.59-3.2) |
| Sedentary activities: hours per weekb | ||||
| 0- 7 | 14 (2.5) | 569 | 1.00 (ref) | 1.00 (ref) |
| 8-14 | 73 (3.5) | 2083 | 1.44 | 1.35 (0.74-2.49) |
| 15-21 | 50 (3.5) | 1412 | 1.46 | 1.38 (0.73-2.62) |
| 22-28 | 11 (2.0) | 549 | 0.81 | 0.68 (0.30-1.57) |
| 29+ | 6 (2.6) | 233 | 1.05 | 0.81 (0.28-2.36) |
a Total differs due to missing values
b Watching television, using a computer, playing video games and reading books and comics
OR Odds ratio, CI Confidence interval