Table 1.
Association of independent variables with continuous oral polio vaccine type 3 titers at 12 monthsa.
| Characteristics | 25th quantile regression
|
50th quantile regression
|
||||
|---|---|---|---|---|---|---|
| Effect | 95% CI | p-value | Effect | 95% CI | p-value | |
| Intercept | 3.73 | (1.21, 6.25) | 0.0039 | 8.54 | (7.53, 9.55) | <.0001 |
| ≥2 diarrhea episodes in 1st 6 months | −0.23 | (−1.26, 0. 80) | 0.6599 | −0.17 | (−0.66, 0.33) | 0.5116 |
| WAZ ≥−2 at 6 months | 2.35 | (0.66, 4.03) | 0.0065 | 1.11 | (0.31, 1.90) | 0.0063 |
| Breastfeeding duration in 1st 6 months | 0.41 | (0.11, 0.71) | 0.0072 | 0.16 | (0.05, 0.28) | 0.0065 |
| Family income (1000 Taka)b | 0.05 | (−0.05, 0.15) | 0.3717 | −0.03 | (−0.08, 0.02) | 0.2159 |
a
Type 3 titer at 12 months of age was analyzed as a continuous outcome in quantile regression (n = 314).
b
The family income was standardized in 1000 Taka, such that the estimated effect was interpreted as the change in type 3 titers for every 1000 Taka increment (one Taka equals approximately $0.013 US dollars).