Table 1 Parental and offspring (N = 4941) characteristics at birth and 9-11 years after moderately preterm birth (32-36 completed weeks). The Aarhus Birth Cohort, Denmark 1989-2001
From: Leisure time physical activity in 9- to 11-year-old children born moderately preterm: a cohort study
| Â | Moderately preterm birth na (%) | Term birth n (%) | p-value |
|---|---|---|---|
Total | 158 (3.2) | 4783 (96.8) | Â |
Prenatal maternal and paternal factors | Â | Â | Â |
Cohabiting Missing data (67) | 151 (96.2) | 4583 (97.2) | 0.46 |
Pre-existing chronic disease Missing data (173) | 13 (8.5) | 179 (3.9) | 0.01 |
Smoking before pregnancy Missing data (11) | 85 (53.8) | 1857 (38.9) | < 0.001 |
Smoking during pregnancy Missing data (96) | 66 (42.3) | 1311 (28.0) | < 0.001 |
Partner smoking during pregnancy Missing data (96) | 81 (63.3) | 1875 (47.5) | 0.001 |
Alcohol during pregnancy (units per week) | Â | Â | 0.99 |
< 1 | 94 (59.9) | 2786 (59.5) |  |
1-2 | 43 (27.4) | 1287 (27.5) | Â |
3+ Missing data (98) | 20 (12.7) | 613 (13.1) | Â |
Leisure time physical activity during pregnancy | Â | Â | 0.005 |
Sedentary | 80 (52.6) | 1867 (40.9) | Â |
Light activity | 68 (44.7) | 2382 (52.2) | Â |
Moderate to heavy activity Missing data (225) | 4 (2.6) | 315 (6.9) | Â |
Offspring at 9-11Â years | Â | Â | 0.52 |
Girl | 74 (46.8) | 2379 (49.7) | Â |
Boy | 84 (53.2) | 2404 (50.3) | Â |
Height, mean (SD) | 142 (8.1) | 142 (8.0) | 0.74 |
Weight, median (min-max) Missing data (0) | 35 (7.3) | 34.5 (7.1) | 0.34 |
Asthma diagnosed by a medical doctor |  |  | < 0.001 |
Yes | 30 (19) | 399 (8.3) | Â |
No | 127 (80.4) | 4348 (90.9) | Â |
Do not know Missing data (0) | 1 (0.6) | 36 (0.8) | Â |
Maternal smoking after delivery Missing data (12) | 85 (53.8) | 1926 (40.6) | 0.001 |
Paternal smoking after delivery Missing data (149) | 95 (61.3) | 2063 (44.5) | < 0.001 |
Maternal professional education | Â | Â | 0.07 |
No education (after secondary schools +/− high schools) | 12 (7.6) | 354 (7.5) |  |
Currently studying | 10 (6.3) | 104 (2.2) | Â |
1-2 years of education (after secondary schools +/− high schools) | 44 (27.8) | 1295 (26.4) |  |
3-4 years of education (after secondary schools +/− high schools) | 75 (47.5) | 2271 (47.9) |  |
4 + years of education (after secondary schools +/− high schools) Missing data (40) | 17 (10.8) | 763 (16.1) |  |
Paternal professional education | Â | Â | 0.022 |
No education (after secondary schools +/− high schools) | 25 (16.3) | 487 (10.5) |  |
Currently studying | 1 (0.7) | 64 (1.4) | Â |
1-2 years of education (after secondary schools +/− high schools) | 19 (12.4) | 553 (12.0) |  |
3-4 years of education (after secondary schools +/− high schools) | 79 (51.6) | 2163 (46.8) |  |
4 + years of education (after secondary schools +/− high schools) Missing data (167) | 29 (19.0) | 1354 (29.3) |  |