Table 1.
Hib Antibody Levels in 762 Gambian Children by Age and Area of Residence
| Characteristic | No. | % ≥0.15 µg/mL | (95% CI) | % >1 µg/mL | (95% CI) | Adjusteda OR for >1 µg/mL | (95% CI) | P Value | GMT | (95% CI) | Adjusteda % Difference in GMT | (95% CI) | P Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | 762 | 99 | (98–100) | 75 | (72–78) | 2.248 | (2.07–2.45) | … | … | ||||
| Area of residence | |||||||||||||
| Ruralb | 419 | 99 | (97–100) | 71 | (66–75) | Baseline | … | 1.913 | (1.71–2.14) | Baseline | … | ||
| Urbanb | 343 | 100 | (99–100) | 80 | (76–84) | 1.60 | (1.14–2.26) | .007 | 2.740 | (2.42–3.11) | 41.93 | (19.86–68.06) | <.001 |
| Age group, yc | |||||||||||||
| 1 to <2 | 239 | 99 | (97–100) | 83 | (77–87) | 2.628 | (2.27–3.05) | Baseline | … | ||||
| 2 to <3 | 249 | 100 | (98–100) | 75 | (69–80) | 0.60 | (.39–.94) | .025 | 2.208 | (1.91–2.55) | −16.63 | (−32.36 to 2.77) | .088 |
| 3 to <5 | 272 | 99 | (97–100) | 69 | (63–74) | 0.47 | (.31–.72) | <.001 | 2.002 | (1.73–2.32) | −21.89 | (−36.38 to −4.11) | .018 |
Abbreviations: CI, confidence interval; GMT, geometric mean titer; hib, Haemophilus influenzae type b; OR, odds ratio.
a Adjusted by other variables in the table.
b Rural: Sibanor; urban: Serekunda and Fajikunda combined.
c Two children with missing ages.