Table 2.
Baseline Demographic Indicators and Seroprevalence of Maternal Antibodies (Abs) Against Poliovirus at Birth
| Variable | Value |
|---|---|
| Demographic indicator | |
| Male sex | 439/900 (49) |
| No formal education for mother | 423/900 (47) |
| Place of birth other than home | 624/900 (69) |
| Birth weight, kg, median (IQR) | 2.81 (2.53–3.1) |
| Family size, individuals, no. | |
| <6 | 304/900 (34) |
| 6–9 | 294/900 (33) |
| >9 | 302/900 (34) |
| Monthly household income, $ | |
| <50 | 168/896 (18) |
| 50–100 | 418/896 (47) |
| >100 | 310/896 (35) |
| Exclusive breastfeeding at age 22 wk | 447/713 (63) |
| Maternal Ab seroprevalence, by poliovirus type | |
| Type 1 | |
| Seroprevalence | |
| Proportion | 634/713 |
| Percentage (95% CI) | 89 (87–91) |
| Titer, median (95% CI) | 90.5 (72–113.8) |
| Type 2 | |
| Seroprevalence | |
| Proportion | 590/713 |
| Percentage (95% CI) | 83a (80–86) |
| Titer, median (95% CI) | 36 (28.4–45.3) |
| Type 3 | |
| Seroprevalence | |
| Proportion | 440/713 |
| Percentage (95% CI) | 62 (58–65) |
| Titer, median (95% CI) | 11.3 (11.3–14.2) |
Data are proportion (%) of children, unless otherwise indicated.
Abbreviations: CI, confidence interval; IQR, interquartile range.
a
Statistically significant variation between arms.