Table 1.
Primary analysis of characteristics of children within the BHDSS and crude and adjusted odds of being unvaccinatedI with the primary series of vaccination at 10 mo of age. Selected risk factors of interest are in bold
| Descriptive variableII | TotalN= 30 832 | (Col %) | Unvaccinatedn=1567 | (Row %) | Crude ORIII (95% CI) | p-valueIV | Adjusted OR (95% CI) | p-valueIV |
|---|---|---|---|---|---|---|---|---|
| Sex | ||||||||
| Female | 15 076 | (48.9) | 775 | (5.1) | 1 | ND | ND | |
| Male | 15 753 | (51.1) | 792 | (5.0) | 1.00 (0.89 to 1.12) | 0.94 | ||
| Missing | 3 | (0.0) | 0 | (0.0) | ||||
| Ethnicity V | ||||||||
| Mandinka | 6418 | (20.8) | 231 | (3.6) | 1 | <0.001 | 1 | <0.001 |
| Fula | 9836 | (31.9) | 525 | (5.3) | 1.57 (1.31 to 1.89) | 1.61 (1.33 to 1.96) | ||
| Serahule | 14 070 | (45.6) | 782 | (5.6) | 1.64 (1.38 to 1.95) | 1.58 (1.32 to 1.90) | ||
| Other | 505 | (1.6) | 29 | (5.7) | 1.85 (1.19 to 2.89) | 1.85 (1.14 to 3.00) | ||
| Missing | 3 | (0.0) | 0 | (0.0) | ||||
| Distance to RCH VI | ||||||||
| ≥0 and <0.5 km | 15 113 | (49.0) | 737 | (4.9) | 1 | 0.26 | 1 | <0.001 |
| ≥0.5 and <1 km | 4616 | (15.0) | 263 | (5.7) | 1.21 (1.02 to 1.44) | 1.23 (1.03 to 1.46) | ||
| ≥1 and < 2 km | 4502 | (14.6) | 240 | (5.3) | 1.10 (0.92 to 1.31) | 1.16 (0.96 to 1.40) | ||
| ≥2 and <3 km | 3051 | (9.9) | 151 | (4.9) | 1.01 (0.82 to 1.26) | 1.05 (0.84 to 1.31) | ||
| ≥3 and <4 km | 2136 | (6.9) | 95 | (4.4) | 0.92 (0.71 to 1.18) | 0.96 (0.74 to 1.25) | ||
| ≥4 km | 283 | (0.9) | 16 | (5.7) | 1.11 (0.62 to 1.98) | 1.10 (0.68 to 2.06) | ||
| Missing | 1131 | (3.7) | 65 | (5.7) | ||||
| Migration VII | ||||||||
| No in-migration | 28 404 | (92.1) | 1402 | (4.9) | 1 | <0.001 | 1 | <0.001 |
| Within the BHDSS | 551 | (1.8) | 43 | (7.8) | 1.80 (1.26 to 2.58) | 1.67 (1.15 to 2.44) | ||
| Internal in-migration | 503 | (1.6) | 33 | (6.6) | 1.39 (0.91 to 2.13) | 1.22 (0.79 to 1.89) | ||
| External in-migration | 177 | (0.6) | 21 | (11.9) | 2.90 (1.61 to 5.24) | 2.60 (1.39 to 4.87) | ||
| Missing | 1197 | (3.9) | 68 | (5.7) | ||||
| Birth order | ||||||||
| First | 22 223 | (72.1) | 1108 | (5.0) | 1 | 0.67 | ND | ND |
| Second | 7485 | (24.3) | 362 | (4.8) | 0.98 (0.86 to 1.12) | |||
| Third | 601 | (1.9) | 36 | (6.0) | 1.25 (0.85 to 1.83) | |||
| Fourth or higher | 30 | (0.1) | 2 | (6.7) | 1.24 (0.23 to 6.81) | |||
| Missing | 493 | (1.6) | 59 | (12.0) | ||||
| Pregnancy type | ||||||||
| Singleton | 29 324 | (95.1) | 1452 | (5.0) | 1 | ND | ND | |
| Twins | 1015 | (3.3) | 56 | (5.5) | 1.09 (0.75 to 1.59) | 0.65 | ||
| Missing | 493 | (1.6) | 59 | (12.0) | ||||
| Head of house VIII | ||||||||
| Was a parent | 6020 | (19.5) | 247 | (4.1) | 1 | 1 | ||
| Was not a parent | 24 471 | (79.4) | 1298 | (5.3) | 1.31 (1.12 to 1.53) | <0.001 | 1.29 (1.09 to 1.52) | <0.001 |
| Missing | 341 | (1.1) | 22 | (6.5) | ||||
| Mothers age at birth, y | ||||||||
| <15 | 178 | (0.6) | 10 | (5.6) | 1 | 0.26 | ND | ND |
| ≥15 and <20 | 3763 | (12.2) | 194 | (5.2) | 0.93 (0.46 to 1.89) | |||
| ≥20 and <30 | 16 244 | (52.7) | 838 | (5.2) | 0.93 (0.47 to 1.86) | |||
| ≥30 and <40 | 8799 | (28.5) | 399 | (4.5) | 0.80 (0.40 to 1.61) | |||
| ≥40 | 1338 | (4.3) | 67 | (5.0) | 0.89 (0.42 to 1.87) | |||
| Missing | 510 | (1.7) | 59 | (11.6) | ||||
| Presence of parents IX | ||||||||
| Both present | 13 938 | (45.2) | 574 | (4.1) | 1 | <0.001 | 1 | <0.001 |
| Mother present | 15 605 | (50.6) | 867 | (5.6) | 1.40 (1.25 to 1.58) | 1.38 (1.22 to 1.58) | ||
| Father present | 155 | (0.5) | 12 | (7.7) | 2.78 (1.32 to 5.88) | 2.93 (1.33 to 6.46) | ||
| Neither present | 1134 | (3.7) | 114 | (10.1) | 2.26 (1.62 to 3.15) | 2.26 (1.60 to 3.19) |
Abbreviations: BHDSS, Basse Health and Demographic Surveillance system; RCH, Reproductive and Child Health centre.
IChildren were defined as unvaccinated if they had not received any primary series vaccinations (oral polio vaccine, pneumococcal conjugate vaccine and the pentavalent vaccine) by 10 mo of age.
IIBolded risk factors are those considered risk factors of interest based on the univariate analysis and hypothesis.
IIISex and mother's age at birth were included in all crude analyses as variables a priori.
IVp-values obtained using Wald test.
VAdjusted for sex, mothers age at birth, distance from health centre, presence of parents, immigration and headship.
VIAdjusted for sex, mother's age at birth, ethnicity, presence of parents, immigration and headship.
VIIAdjusted for sex, mother's age at birth, ethnicity, distance from health centre, presence of parents and headship.
VIIIAdjusted for sex, mother's age at birth, ethnicity, immigration and distance from health centre.
IXAdjusted for sex, mother's age at birth, ethnicity, distance from health centre and immigration.