Table 3. Sociodemographic factors associated with timely birth dose of HBV vaccine and completion of three-dose vaccination schedule by 6 months of age in schoolchildren aged 6–8 years in Kwajalein Atoll.
| Characteristic | Totala n = 296 |
Timely birth dose given (n = 296)a n(%) |
Birth dose given at > 24 hours (n = 29) n(%) |
P | Timely third dose (n = 173) n(%) |
Third dose given at > 6 months (n = 123) n(%) |
P |
|---|---|---|---|---|---|---|---|
|
Child’s age (years)
| |||||||
| 6 | 175 (59.1) | 156 (58.4) | 19 (65.5) | 0.774 | 108 (62.4) | 67 (54.5) | 0.070 |
| 7 | 101 (34.1) | 92 (34.5) | 9 (31.0) | 58 (33.5) | 43 (35.0) | ||
| 8 | 20 (6.8) | 19 (7.1) | 1 (3.5) | 7 (4.1) | 13 (10.6) | ||
| Residence | |||||||
| Ebeye | 259 (87.5) | 248 (92.9) | 11 (37.9) | < 0.001 | 166 (96.0) | 93 (75.6) | < 0.001 |
| Carlos | 4 (1.4) | 4 (1.5) | 0 | 1 (0.6) | 3 (2.4) | ||
| Ebadon | 4 (1.4) | 4 (1.5) | 0 | 1 (0.6) | 3 (2.4) | ||
| Mejatto | 8 (2.7) | 8 (3.0) | 0 | - | 2 (1.2) | 6 (4.9) | - |
| Santo | 21 (7.1) | 3 (1.1) | 18 (62.1) | - | 3 (1.7) | 18 (14.6) | - |
| Place of birth | |||||||
| Hospitalb | 268 (90.5) | 264 (98.9) | 4 (13.8) | < 0.001 | 170 (98.3) | 98 (79.7) | < 0.001 |
| Primary care facilityc | 26 (8.8) | 1 (0.4) | 25 (86.2) | 2 (1.2) | 24 (19.5) | ||
| Home | 2 (0.7) | 2 (0.8) | 0 | 1 (0.6) | 1 (0.8) | ||
| Maternal age (years) | |||||||
| < 25 | 7 (2.5) | 7 (2.6) | 0 | 1.00 | 5 (2.9) | 2 (1.6) | 0.703 |
| ≥ 25 | 289 (97.6) | 260 (97.4) | 29 (100) | 168 (97.1) | 121 (98.4) | ||
| Education | |||||||
| Primary | 28 (9.5) | 27 (10.1) | 1 (3.5) | 0.381 | 16 (9.3) | 12 (9.8) | 0.741 |
| Some high school | 140 (47.3) | 123 (46.1) | 17 (58.6) | - | 79 (45.1) | 61 (49.6) | |
| Completed high school/college | 128 (43.2) | 117 (43.8) | 11 (37.9) | 78 (45.7) | 50 (40.7) | ||
| Employment | |||||||
| Employed | 79 (26.7) | 69 (25.8) | 10 (34.5) | 0.376 | 54 (31.2) | 25 (20.3) | 0.045 |
| Not employed | 217 (73.3) | 198 (74.2) | 19 (65.5) | 119 (68.8) | 98 (79.7) | ||
| Maternal HBV vaccination status | |||||||
| Vaccinated | 62 (21.0) | 58 (21.7) | 4 (13.8) | 0.471 | 36 (20.8) | 26 (21.1) | 1.00 |
| Not vaccinated | 234 (79.1) | 209 (78.3) | 25 (86.2) | 137 (79.2) | 97 (78.9) | ||
| No. of return antenatal visits | |||||||
| < 3 | 27 (9.1) | 24 (9.0) | 3 (10.3) | < 0.001 | 11 (6.4) | 16 (13.0) | < 0.001 |
| ≥ 3 | 209 (70.6) | 205 (76.8) | 4 (13.8) | 138 (79.8) | 71 (57.7) | ||
| Unknown | 60 (20.3) | 38 (14.2) | 22 (75.9) | 24 (13.9) | 36 (29.3) | ||
| Maternal HBV status | |||||||
| Negative | 276 (93.2) | 248 (92.9) | 28 (96.6) | 0.705 | 159 (91.9) | 117 (95.1) | 0.351 |
| Positive | 20 (6.8) | 19 (7.1) | 1 (3.5) | 14 (8.1) | 6 (4.9) | ||
| Maternal knowledge (out of 10) | |||||||
| Good, ≥ 6 | 153 (51.7) | 137 (51.3) | 16 (55.2) | 0.845 | 91 (52.6) | 62 (50.4) | 0.725 |
| Poor, < 6 | 143 (48.3) | 130 (48.7) | 13 (44.8) | 82 (47.4) | 61 (49.6) | ||
| Maternal attitude (out of 6) | |||||||
| Positive, ≥ 4 | 286 (96.6) | 257 (96.3) | 29 (100) | 0.606 | 165 (95.4) | 121 (98.4) | 0.203 |
| Negative, < 4 | 10 (3.4) | 10 (3.8) | 0 | 8 (4.6) | 2 (1.6) | ||
HBV: hepatitis B virus.
a For the purposes of analysing the participants as mother–child pairs, the two sets of twin children in this study were assumed to have the same vaccination status. The total reflects the number of mother–child pairs, rather than the number of children.
b Includes those born in hospitals outside Kwajalein Atoll such as Majuro Hospital and hospitals in other countries.
c Includes all dispensaries outside Ebeye.