Table 2. Characteristics of the biological mothers of first grade children from Kwajalein Atoll included in the 2016–2017 national seroprevalence study of HBV infection, by infection status.
| Characteristic | All mothers (n = 296) n(%) |
Seropositive (n = 20) n(%) |
Seronegative (n = 276) n(%) |
P |
|---|---|---|---|---|
| Age (years) | ||||
| < 25 | 7 (2.4) | 0 (0) | 7 (2.5) | 1.00 |
| ≥ 25 | 289 (97.6) | 20 (100) | 269 (97.5) | - |
| Education | ||||
| Primary | 28 (9.5) | 3 (15.0) | 25 (9.1) | 0.03 |
| Some high school | 140 (47.3) | 4 (20.0) | 136 (49.3) | - |
| Completed high school/college | 128 (43.2) | 13 (65.0) | 115 (41.7) | - |
| Employment | ||||
| Employed | 79 (26.7) | 7 (35.0) | 72 (26.1) | 0.43 |
| Not employed | 217 (73.3) | 13 (65.0) | 204 (73.1) | - |
| HBV vaccination status | ||||
| Vaccinated | 62 (20.9) | 2 (10.0) | 60 (21.7) | 0.27 |
| Not vaccinated | 234 (79.1) | 18 (90.0) | 216 (78.3) | - |
| No. of return antenatal visits | ||||
| < 3 | 27 (9.1) | 0 (0) | 27 (9.8) | 0.16 |
| ≥ 3 | 209 (70.6) | 18 (90.0) | 191 (69.2) | - |
| Unknowna | 60 (20.3) | 2 (10.0) | 58 (21.0) | - |
HBV: hepatitis B virus.
P-values compare the proportions of mothers who are seropositive and seronegative using Fisher’s exact test.
a Antenatal records were missing for the pregnancy of interest and HBV status was assessed from a subsequent pregnancy.