Table 1. Characteristics of study population and coverage of hepatitis B (HB) vaccination by residence.
| Variables | Total (n=1,145) | Urban (n=626) | |||
| Metropolitan | Province centers | Subtotal | Rural Soums | ||
| (n=433) | (n=193) | (n=626) | (n=519) | ||
| Age, mean (SD)† | 8.5 (0.8) | 8.5 (0.8) | 8.3 (0.7) | 8.5 (0.8) | 8.6 (0.8) |
| Sex, boys† | 592 (51.7) | 225 (52.0) | 104 (53.9) | 329 (52.6) | 263 (50.7) |
| Immunization card, Yes† | 702 (61.3) | 125 (28.9) | 122 (63.2) | 247 (39.5) | 455 (87.7)*** |
| HB vaccination status‡ | |||||
| HB-Birth vaccine | |||||
| Valid | 454 (64.7) | 94 (75.2) | 73 (59.8) | 167 (67.6) | 287 (63.1) |
| Late | 224 (31.9) | 26 (20.8) | 37 (30.3) | 63 (25.5) | 161 (35.4)** |
| No vaccine | 24 (3.4) | 5 (4.0) | 12 (9.8) | 17 (6.9) | 7 (1.5) |
| HB-Total vaccine | |||||
| Complete | 422 (60.1) | 85 (68.0) | 68 (55.7) | 153 (61.9) | 269 (59.1) |
| Incomplete | 271 (38.6) | 37 (29.6) | 52 (42.6) | 89 (36.0) | 182 (40.0) |
| Unvaccinated | 9 (1.3) | 3 (2.4) | 2 (1.6) | 5 (2.0) | 4 (0.9) |
Variables are shown as number and proportion, n (%).
**p<0.01; ***p<0.001 compared to the corresponding values in Urban areas (subtotal).
† : Distributions of age, sex and immunization card are shown for all children (n=1,145).
‡ : HB vaccination status is shown for those (n=702) who have immunization documentation.
SD: Standard deviation