Table 1. Sociodemographic Characteristics of the Children, According to Vaccination Status.*.
| Characteristic | Unvaccinated Children |
Partially Vaccinated Children |
Fully Vaccinated Children |
|---|---|---|---|
| number of person-days at risk (percent) | |||
| Sex | |||
| Female | 2,474,089 (48.3) | 2,611,142 (48.9) | 3,654,907 (49.4) |
| Male | 2,644,379 (51.7) | 2,729,063 (51.1) | 3,750,159 (50.6) |
| Age at start of study period | |||
| 5 yr | 1,554,605 (30.4) | 565,630 (10.6) | 423,852 (5.7) |
| 6 yr | 975,943 (19.1) | 800,812 (15.0) | 835,763 (11.3) |
| 7 yr | 752,281 (14.7) | 886,631 (16.6) | 1,050,709 (14.2) |
| 8 yr | 608,456 (11.9) | 836,290 (15.7) | 1,043,724 (14.1) |
| 9 yr | 518,139 (10.1) | 831,587 (15.6) | 1,332,899 (18.0) |
| 10 yr | 417,013 (8.1) | 743,220 (13.9) | 1,382,027 (18.7) |
| 11 yr | 292,031 (5.7) | 676,035 (12.7) | 1,336,092 (18.0) |
| Ethnic group† | |||
| Chinese | 3,619,247 (70.7) | 3,720,381 (69.7) | 5,134,163 (69.3) |
| Malay | 743,466 (14.5) | 889,602 (16.7) | 1,240,769 (16.8) |
| Indian | 494,626 (9.7) | 557,723 (10.4) | 785,266 (10.6) |
| Other | 261,129 (5.1) | 172,499 (3.2) | 244,868 (3.3) |
| Housing | |||
| Public housing | |||
| One or two rooms | 179,652 (3.5) | 187,694 (3.5) | 229,088 (3.1) |
| Three rooms | 700,015 (13.7) | 822,460 (15.4) | 1,149,798 (15.5) |
| Four rooms | 1,805,300 (35.3) | 1,943,067 (36.4) | 2,671,568 (36.1) |
| Five rooms | 1,294,517 (25.3) | 1,438,387 (26.9) | 2,073,120 (28.0) |
| Private housing | 1,082,114 (21.1) | 893,930 (16.7) | 1,202,149 (16.2) |
| Other | 56,870 (1.1) | 54,667 (1.0) | 79,343 (1.1) |
*
The total number of person-days at risk was 5,118,468 in the unvaccinated group, 5,340,205 in the partially vaccinated group, and 7,405,066 in the fully vaccinated group. Percentages may not total 100 because of rounding.
†
Ethnic group was reported in the national birth registry.