Table 1

The number of children with colic (n), and the cumulated incidence proportion of infantile colic (CIP) according to possible perinatal determinants among 1955 children

	N	n	CIP (%)
Gestational age (completed weeks)
< 37	79	13	16.5
37–41	1646	184	11.2
42+	227	17	7.5
Missing	3	0	0
Birth weight (g)
< 2500	61	15	24.6
2500–3499	845	91	10.8
3500–4499	992	100	10.1
4500+	57	8	14.0
Small for gestational age^1-150
No	1722	190	11.0
Yes	230	24	10.4
Missing	3	0	0
Ponderal index (kg/m³)
< 23.5	476	56	11.8
23.5–26.7	974	103	10.6
26.8+	489	53	10.8
Missing	16	2	12.5

↵1-150 Small for gestational age = newborns with a birth weight below the sex specific 10th percentile for each completed gestational week.