Table 1 Patient characteristics in the neonatal period and at the time of measurement according to the duration of mechanical ventilation, presented as median and interquartile range (in brackets) or N (%)
Not ventilated infants | Intubated and ventilated < 7days | Intubated and ventilated ≥ 7days | p-value | |
|---|---|---|---|---|
N = 84 | N = 47 | N = 45 | ||
Neonatal period | ||||
Gestational age (weeks) | 29 | 27 | 26 | <0.001 |
(28–30) | (26 – 28) | (25 – 27) | ||
Birth weight (g) | 1145 | 930 | 803 | <0.001 |
(890–1340) | (740–1230) | (580 – 950) | ||
Birth weight z-score | -0.33 | -0.14 | -0.44 | 0.305 |
(-0.99 - 0.33) | (-0.88 - 0.56) | (-1.18 - 0.14) | ||
Antenatal steroids1) | 59/81 (73%) | 33/42 (79%) | 41/45 (91%) | 0.053 |
Surfactant administration1) | 41/83 (49%) | 43/43 (100%) | 42/45 (93%) | <0.001 |
BPD | 14 (17%) | 25 (53%) | 35 (78%) | <0.001 |
At day of measurement | ||||
Age (days) | 149 | 142 | 158 | 0.105 |
(116–204) | (116 – 166) | (143 – 181) | ||
Postmenstrual age (weeks) | 49.9 | 48.4 | 48.3 | 0.114 |
(46.9 – 58.0) | (44.0 – 51.3) | (46.4 – 53.4) | ||
Body length (cm) | 57.75 | 57 | 56.0 | 0.155 |
(55.0 – 62.3) | (53 – 60.0) | (54–60.0) | ||
Body weight (g) | 5052.5 | 4900 | 4815 | 0.210 |
(4315–6205) | (4200 – 5860) | (4100 – 5580) |