Chronic lung disease
| | | |
Oxygen dependency at 28 days* | | | |
<1000 g | 68 (73) | 196 (58) | 0.007 |
1000–1499 g | 68 (26) | 94 (14) | <0.001 |
<1500 g | 136 (39) | 290 (29) | 0.001 |
Oxygen dependency at 36 weeks† | | | |
<1000 g | 37 (42) | 110 (33) | 0.14 |
1000–1499 g | 43 (17) | 43 (7) | <0.001 |
<1500 g | 80 (23) | 153 (16) | 0.002 |
| | | |
Retinopathy of prematurity (ROP)‡ | | | |
Examined for ROP | | | |
<1000 g | 83 (97) | 305 (93) | 0.23 |
1000–1499 g | 230 (91) | 391 (61) | <0.001 |
<1500 g | 313 (93) | 696 (72) | <0.001 |
Stages 1 or 2 ROP§ | | | |
<1000 g | 29 (35) | 83 (27) | 0.17 |
1000–1499 g | 24 (10) | 40 (10) | 0.94 |
<1500 g | 53 (17) | 123 (18) | 0.77 |
Stages 3 or 4 ROP§ | | | |
<1000 g | 11 (13) | 19 (6) | 0.03 |
1000–1499 g | 1 (1) | 2 (1) | 1.00 |
<1500 g | 12 (4) | 21 (3) | 0.50 |
| | | |
Intraventricular haemorrhage (IVH)‡ | | | |
Examined for IVH | | | |
<1000 g | 70 (81) | 325 (99) | <0.001 |
1000–1499 g | 179 (71) | 596 (92) | <0.001 |
<1500 g | 249 (74) | 921 (94) | <0.001 |
Grades 1§ | | | |
<1000 g | 19 (27) | 28 (9) | <0.001 |
1000–1499 g | 40 (22) | 42 (7) | <0.001 |
<1500 g | 59 (24) | 70 (8) | <0.001 |
Grades 2 or 3§ | | | |
<1000 g | 14 (20) | 28 (9) | 0.005 |
1000–1499 g | 14 (8) | 19 (3) | 0.007 |
<1500 g | 28 (11) | 47 (5)¶ | <0.001 |
Grade 4§ | | | |
<1000 g | 5 (7) | 9 (3) | 0.07 |
1000–1499 g | 4 (2) | 14 (2) | 1.00 |
<1500 g | 9 (4) | 23 (2) | 0.34 |