Table 1. Demographics of study participants in each trajectory.
| Male | 468 (51) | 48 (65.8) | 15 (62.5) | 40 (54.8) |
| Family history of atopy | 410 (51.3) | 49 (69) | 17 (70.8) | 49 (72.1) |
| Household income > USD 4000 | 232 (25.4) | 26 (36.6) | 11 (47.8) | 21 (30) |
| Ethnicity | ||||
| Chinese | 520 (53) | 43 (58.9) | 16 (66.7) | 47 (64.4) |
| Malay | 267 (27.2) | 24 (32.9) | 7 (29.2) | 16 (21.9) |
| Indian | 193 (19.7) | 6 (8.2) | 1 (4.2) | 10 (13.7) |
| Others | 2 (0.2) | 0 (0) | 0 (0) | 0 (0) |
| Presence of siblings | 533 (58.1) | 37 (50.7) | 12 (50) | 38 (52.1) |
| Antenatal & intrapartum antibiotics | 404 (44) | 33 (45.8) | 16 (66.7) | 30 (41.1) |
| Caesarean delivery | 270 (29.4) | 26 (36.1) | 4 (16.7) | 22 (30.1) |
| Breastfeeding level | ||||
| Low | 381 (47.7) | 26 (36.6) | 5 (21.7) | 27 (39.7) |
| Mid | 319 (40) | 36 (50.7) | 14 (60.9) | 39 (57.4) |
| High | 98 (12.3) | 9 (12.7) | 4 (17.4) | 2 (2.9) |
| Pet ownership in first year of life | 47 (6.1) | 10 (14.3) | 4 (16.7) | 5 (7.5) |
| Household exposure to tobacco smoke | 226 (38.7) | 27 (42.9) | 3 (15.8) | 20 (35.1) |
| Childcare attendance in first year of life | 53 (8.3) | 11 (16.9) | 5 (25) | 3 (5.1) |
| Infant antibiotic use in first year of life | 287 (46.1) | 33 (50) | 12 (57.1) | 19 (34.5) |
Cells in bold and italics indicate significance at p value ≤0.05 compared to reference group in univariate analysis after Bonferroni correction.