Table 5.
Multivariable analysis of maternal/infant pairs by GBS colonisation status at time of delivery.a
| M+I+ OR (95% CI) |
M+I− OR (95% CI) |
M−I+ OR (95% CI) |
|
|---|---|---|---|
| Season | |||
| Dry cool | 1 | 1 | 1 |
| Dry hot | 8.3 (3.9–17.6) | 1.8 (0.8–3.9) | 0.4 (0.1–1.4) |
| Wet | 3.5 (1.8–6.8) | 2.3 (1.3–4.3) | 1.1 (0.5–2.5) |
| Breastmilk colonised | |||
| Yes | 21.0 (8.6–51.3) | 11.5 (4.5–29.4) | 7.5 (2.0–27.5) |
| No | 1 | 1 | 1 |
| Gestation (weeks) | |||
| <34 | 1 | 1 | 1 |
| 34–37 | 0.9 (0.9–1.0) | 1.0 (0.9–1.1) | 0.9 (0.8–1.0) |
| 38+ | 0.4 (0.2–1.0) | 0.5 (0.3–1.6) | 0.9 (0.8–1.0) |
| Midwife delivery | 1 | 1 | 1 |
| TBA | 0.9 (0.5–1.6) | 1.0 (0.6–1.8) | 0.6 (0.2–1.3) |
| Number of antenatal clinic visits | |||
| 1 | 1 | 1 | 1 |
| 2+ | 1.1 (0.7–1.9) | 1.2 (0.8–2.1) | 1.3 (0.6–2.8) |
| Stillbirths | |||
| 0 | 1 | 1 | 1 |
| 1 | 2.5 (1.0–8.7) | 2.0 (1.0–4.7) | 1.4 (0.3–5.9) |
| 2+ | 2.4 (0.9–4.1) | 2.2 (0.9–2.1) | ND |
| Spontaneous abortion | |||
| 0 | 1 | 1 | 1 |
| 1 | 0.9 (0.5–1.4) | 0.8 (0.3–2.1) | 1.0 (0.2–5.5) |
| 2+ | 1.2 (1.1–2.3) | 0.3 (0.0–2.2) | 2.0 ND |
| Gravida | |||
| 1 | 1 | 1 | 1 |
| 2–4 | 1.0 (0.9–1.0) | 1.1 (0.6–2.0) | 1.0 (0.8–1.2) |
| 5+ | 1.0 (0.5–2.0) | 0.8 (0.4–1.8) | 0.8 (0.3–2.3) |
M+I+ = mother and infant colonised; M+I− = mother colonised, infant not colonised; M−I+ = mother not colonised, infant colonised, M−I− = neither mother nor infant colonised. 1 = adjusted odds ratios are compared to this group; TBA = trained birth attendant.
a
M−I− = base group.