Size of cohort | 5599 | 5854 |
CLD (n (%)) | 1235 (22%) | 1475 (25%) |
Predictor variable | | |
Gestational age | | |
31 weeks | 1.00 reference group | 1.00 reference group |
30 weeks | 2.05 (1.44 to 2.91) | 1.66 (1.21 to 2.26) |
29 weeks | 4.25 (3.07 to 5.88) | 3.26 (2.43 to 4.39) |
28 weeks | 7.59 (5.49 to 10.51) | 6.56 (4.95 to 8.70) |
27 weeks | 15.58 (11.26 to 21.57) | 13.55 (10.16 to 18.06) |
26 weeks | 25.37 (18.22 to 35.33) | 22.96 (16.95 to 31.11) |
25 weeks | 56.14 (38.86 to 81.10) | 52.22 (37.03 to 73.64) |
⩽24 weeks | 85.70 (57.00 to 128.9) | 142.4 (93.14 to 217.7) |
Weight for gestational age | | |
⩾75th* | 0.54 (0.44 to 0.67) | 0.64 (0.53 to 0.71) |
25th–74th | 1.00 reference group | 1.00 reference group |
10th–24th | 2.05 (1.67 to 2.51) | 1.82 (1.49 to 2.23) |
3rd–9th | 4.01 (3.06 to 5.24) | 2.87 (2.21 to 3.75) |
<3rd | 6.25 (4.29 to 9.11) | 5.27 (3.43 to 8.09) |
Male sex | 1.42 (1.22 to 1.65) | 1.63 (1.41 to 1.89) |