Table 2 Relationship between haemoglobin at birth and primary outcomes (n = 890)

Deaths before discharge

103 (11.6)

Crude

19.5 (7.6–50.4)

6.5 (2.6–16.5)

2.8 (1.2–6.7)

1.7 (0.5–5.0)

1

<0.01

Adjusted^†

4.1 (1.4–11.6)

2.0 (0.7–5.4)

1.5 (0.6–3.7)

1.7 (0.5–5.7)

1

0.01

Intraventricular haemorrhage (All grades)

233 (26.2)

Crude

4.2 (2.2–8.0)

3.6 (2.1–6.2)

2.1 (1.3–3.3)

1.0 (0.5–1.8)

1

<0.01

Adjusted^†

1.6 (0.8–3.3)

1.9 (1.0–3.4)

1.5 (1.0–2.4)

0.9 (0.5–1.8)

1

0.53

Necrotising enterocolitis (All grades)

195 (21.9)

Crude

2.6 (1.3–5.1)

3.2 (1.8–5.7)

1.7 (1.0–2.8)

1.1 (0.6–2.1)

1

<0.01

Adjusted^†

1.0 (0.5–2.2)

1.8 (1.0–3.4)

1.3 (0.8–2.2)

1.2 (0.6–2.3)

1

0.31

Bronchopulmonary dysplasia

242 (27.2)

Crude

3.1 (1.7–5.9)

3.1 (1.8–5.3)

2.0 (1.3–3.1)

0.6 (0.3–1.1)

1

<0.01

Adjusted^†

0.5 (0.3–1.1)

1.0 (0.5–1.9)

1.2 (0.7–2.0)

0.5 (0.2–1.1)

1

0.64

Retinopathy of prematurity (All grades)

185 (20.8)

Crude

3.2 (1.5–6.4)

4.9 (2.7–8.8)

1.9 (1.2–3.2)

0.9 (0.4–1.9)

1

<0.01

Adjusted^†

0.7 (0.3–1.5)

1.9 (1.0–3.8)

1.2 (0.7–2.1)

0.9 (0.4–2.0)

1

0.72