Table 1. Characteristics of study participants.
| Characteristic | Cases (n %) | Controls (n %) | Total (n %) | P value |
|---|---|---|---|---|
| Sample size | 30 | 60 | 90 | |
| No of samples | ||||
| cord blood | 30 (33.3%) | 60 (66.7%) | 90 (100%) | |
| 3 month | 26 (28.9%) | 57 (63.3%) | 83 (92.2%) | |
| 6month | 17 (18.9%) | 44 (48.9%) | 61 (67.8%) | |
| Age in months at first infection for cases only | ||||
| 0–2 | 13 (23.7%) | 26 | 39 | |
| 3–5 | 17 (30.9%) | 34 | 51 | |
| Mean birthweight in Kilograms (Kgs) | 3(2.8–3.2) | 2.8(2.7–3.0) | 0.21 | |
| Mean gestational age in weeks | 38.4(36.9–40.0) | 38.4(37.5–39.3) | 0.99 | |
| Mean (95% CI) cord blood titre in infants admitted<6months [PRNT(log2)] | 10.7(10.3–11.0) | 10.8(10.6–11.1) | 0.4 | |
| Mean (95% CI) cord blood titre in infants admitted<3months [PRNT(log2)] | 10.3(9.6–10.9) | 10.7(10.2–11.1) | 0.3 | |
| Mean (95% CI) cord blood titre in infants admitted 3–6 months [PRNT(log2)] | 11.0(10.6–11.3) | 11.0(10.6–11.4) | 0.9 | |
| Mean (95% CI) decay rates[PRNT(log2)/month ≤6months] | -0.46(-.53 -.38) | -0.55(-0.58-.51) | 0.01 | |
| Mean (95% CI) decay rates[PRNT(log2)/month <3months] | -0.46(-.57 -.35) | -0.55(-.60 -.50) | 0.10 |