Table 2.

Distribution of HbF, Hb and PaO₂ during postnatal week 1 in relation to BPD

		BPD		Unadjusted		Adjusted*		Adjusted†
Postnatal week 1		Yes	No	P value	OR by a 95% CI	P value	OR by a 95% CI	P value	OR by a 95% CI
HbF	Mean % (SD)	61.8 (19.1)	78.6 (14.7)	<0.001	0.55 (0.47 to 0.64)‡	<0.001	0.63 (0.52 to 0.77)‡	<0.001	0.64 (0.49 to 0.83)‡
Hb	Mean g/L (SD)	146.3 (8.6)	153.7 (11.3)	<0.001	0.44 (0.34 to 0.57)‡	0.002	0.62 (0.46 to 0.84)‡	<0.001	0.36 (0.20 to 0.64)‡
PaO2	Mean kPa (SD)	7.4 (0.7)	8.2 (1.3)	<0.001	0.47 (0.36 to 0.59)	<0.001	0.43 (0.30 to 0.60)	0.004	0.45 (0.26 to 0.77)

*Adjusted for gestational age at birth, birth weight small for gestational age, sex, highest and lowest FiO₂ (12 hours).

†In the full statistical model, adjusted for gestational age at birth, birth weight small for gestational age, sex, highest and lowest FiO₂ (12 hours) and CRIB-II score.

‡OR by a 10-unit increase p values <0.05 in bold.

BPD, bronchopulmonary dysplasia; CRIB, Clinical Risk Index for Babies scoring system II; FiO₂, fractional inspired oxygen; Hb, haemoglobin; HbF, fetal haemoglobin; PaO₂, partial oxygen pressure.