Table 6. Descriptive characteristics of children aged 12–60 months included in the study on the association between vaccination schedules (vaccine type) and hepatitis B vaccination timing in 47 countries.
| Characteristic | No. (%) of children |
|---|---|
| Child’s sex | |
| Male | 105 351 (51) |
| Female | 102 095 (49) |
| Residence | |
| Urban | 75 470 (36) |
| Rural | 131 976 (64) |
| Birth order | |
| First child | 53 614 (26) |
| Second or higher child | 153 832 (74) |
| Place of delivery | |
| Home | 64 666 (31) |
| Institution | 138 963 (67) |
| Missing data | 3817 (2) |
| Mother’s education | |
| None | 55 907 (27) |
| Primary | 67 851 (33) |
| Secondary or higher | 83 642 (40) |
| Missing | 45 (< 1) |
| Mother’s marital status | |
| Unmarried | 55 614 (27) |
| Married | 151 832 (73) |
| Wealth indexa | |
| Poorest | 46 606 (22) |
| Poor | 44 791 (22) |
| Medium | 42 917 (21) |
| Rich | 39 492 (19) |
| Richest | 33 641 (16) |
| Family size, mean (95% CI) | 6.62 (6.57 to 6.67) |
| Country income levelb | |
| Low | 68 224 (33) |
| Lower-middle | 103 415 (50) |
| Upper-middle | 35 807 (17) |
| Total (weighted) | 207 446 (100) |
| Population size (unweighted) | 211 643 |
CI: confidence interval.
a Wealth index as an indicator of economic status of the household, categorized into five quintiles ranging from the poorest 20% to the richest 20%.
b Country income level as per the World Bank.22
Notes: Missing observations (non-responses) were excluded from the analysis. Numbers are weighted counts.