Table 2.
Immune response to hepatitis B vaccine in different age groups.
| Age | N | Mean Titres (IU/L) | P valuea | <10 IU/L | >10 IU/L | P valueb |
|---|---|---|---|---|---|---|
| 0–1 yr | 3 | 464.33 | 0.000 | 0 | 3 (100%) | 0.000013 |
| >1–2yr | 17 | 226.76 | 0 | 17 (100%) | ||
| >2–3yr | 10 | 299.33 | 0 | 10 (100%) | ||
| >3–4yr | 11 | 209.73 | 2 (18.2%) | 9 (81.8%) | ||
| >4–5yr | 14 | 86.23 | 6 (42.8%) | 8 (57.2%) | ||
| >5–6 yr | 7 | 16.00 | 3 (42.8%) | 4 (57.2%) | ||
| >6–7 yr | 16 | 22.00 | 6 (37.5%) | 10 (62.5%) | ||
| >7–8 yr | 13 | 76.50 | 5 (38.4%) | 8 (62.6%) | ||
| >8-9yr | 16 | 62.14 | 7 (43.2%) | 9 (56.2%) | ||
| >9–10yr | 15 | 76.20 | 9 (60%) | 6 (40%) | ||
| Total | 122 | 126.20 | 38 (31.14%) (CI = 59.8–76.8%) |
84 (68.86%) (CI = 23.1–40.2%) |
a = ANOVA for difference between means, b = Extended Mantel-Haenszel chi square for linear trend.
CI, Confidence interval; ANOVA, Analysis of variance.