Table 1 Baseline characteristics of infants and their families. Results presented as absolute figures (percentages of total) or mean values (SD). Missing values comprised maximum 1% and were collapsed with no category
All N = 185 (100 %) | Treatment group N = 96 | Control group N = 89 | |
|---|---|---|---|
Male | 90 (48.6) | 40 (41.7) | 50 (56.2) |
Female | 95 (51.4) | 56 (58.3) | 39 (43.8) |
Birth Weight (g) | 3438 (583) | 3452 (630) | 3422 (529) |
Birth length (cm) | 51 (2.4) | 51 (2.6) | 51 (2.2) |
Gestational age at birth (weeks) | 39.5 (1.7) | 39.5 (1.7) | 39.5 (1.7) |
Weight at study (g) | 4742 (838) | 4787 (874) | 4694 (798) |
Age at onset of colic (days) | 13.1 (10.7) | 13.1 (11.5) | 13.2 (9.7) |
Age at inclusion (weeks) | 6.7 (2.8) | 6.8 (2.9) | 6.6 (2.6) |
Age categories at inclusion (weeks) | |||
2-6 | 91 (49.2) | 48 (50.0) | 43 (48.3) |
7-10 | 77 (41.6) | 37 (38.5) | 40 (44.9) |
11-14 | 17 (9.2) | 11 (11.5) | 6 (6.7) |
Feeding mode | |||
Breast-fed | 104 (56.2) | 52 (54.2) | 52 (58.4) |
Bottle-fed | 51 (27.6) | 28 (29.2) | 23 (25.8) |
Breast and bottle-fed | 30 (16.2) | 16 (16.7) | 14 (15.7) |
Birth | |||
Normal vaginal delivery | 132 (71.4) | 64 (66.7) | 68 (76.4) |
Vacuum-assisted delivery | 8 (4.3) | 5 (5.2) | 3 (3.4) |
Caesarean, planned | 21 (11.4) | 15 (15.6) | 7 (7.9) |
Caesarean, acute | 24 (13.0) | 13 (13.5) | 11(12.4) |
Siblings (yes) | 105 (56.8) | 56 (58.3) | 49 (55.1) |
Siblings with colic (yes) | 35 (18.9) | 16 (16.7) | 19 (21.3) |
Health of mother | |||
Physical or mental illness (yes) | 48 (25.9) | 26 (27.1) | 22 (24.7) |
Severe incidenta in the family during pregnancy (yes) | 50 (27.0) | 31 (32.3) | 19 (21.3) |
Severe incidenta in the family after birth (yes) | 32 (17.3) | 16 (16.7) | 16 (18.0) |
Educational level, mother | |||
Primary school | 11 (5.9) | 6 (6.3) | 5 (5.6) |
Upper secondary school | 7 (3.8) | 4 (4.2) | 3 (3.4) |
Skilled | 21 (11.4) | 18 (18.3) | 3 (3.4) |
Short academic education (2-2.5 years) | 26 (14.1) | 14 (14.6) | 12 (13.5) |
Medium academic education (3.5-4 years) | 62 (33.5) | 26 (27.1) | 36 (40.4) |
Long academic education (>5 years) | 34 (18.4) | 19 (19.8) | 15 (16.9) |
Undergoing education | 24 (13.1) | 9 (9.4) | 15 (16.9) |
Cohabitation status | |||
Cohabiting/married | 172 (93.0) | 89 (92.7) | 83 (93.3) |
Living alone | 13 (7.0) | 7 (7.3) | 6 (6.7) |