Table 2.
Adjusted odds ratios for association of demographic factors with seroconversion among previously seronegative unvaccinated participants.
| Characteristic | Third round (n = 1762) |
Fourth round (n = 952) |
||
|---|---|---|---|---|
| OR (95% CI) | p-value | OR (95% CI) | p-value | |
| Sex | ||||
| Female | ||||
| Male | 1.72 (1.33–2.22) | <0.01 | 1.40 (1.04–1.89) | 0.03 |
| Age group (years) | ||||
| 0–19 | ||||
| 20–59 | 12.70 (8.14–20.26) | <0.01 | 9.28 (6.06–14.63) | <0.01 |
| 60+ | 10.28 (5.43–19.78) | <0.01 | 3.96 (1.51–10.96) | <0.01 |
| Ethnicity | ||||
| Khalkh | ||||
| Kazakh | 0.85 (0.37–2.00) | 0.70 | 3.05 (1.68–5.63) | <0.01 |
| Buriad | 0.58 (0.08–3.07) | 0.55 | 0.98 (0.43–2.19) | 0.95 |
| Others | 0.63 (0.37–1.04) | 0.08 | 1.00 (0.30–3.34) | 0.99 |
| Region | ||||
| Ulaanbaatar | ||||
| Central | 0.31 (0.13–0.67) | <0.01 | 0.14 (0.09–0.23) | <0.01 |
| Eastern | 0.16 (0.08–0.30) | <0.01 | 0.23 (0.17–0.31) | <0.01 |
| Khangai | 0.19 (0.12–0.30) | <0.01 | 0.18 (0.12–0.25) | <0.01 |
| Western | 0.12 (0.06–0.23) | <0.01 | 0.16 (0.10–0.27) | <0.01 |
| Occupation | ||||
| Healthcare worker | ||||
| Other | 0.94 (0.63–1.44) | 0.79 | 0.82 (0.42–1.60) | 0.57 |
| Any comorbidity | ||||
| No | ||||
| Yes | 1.11 (0.72–1.70) | 0.64 | 0.76 (0.43–1.35) | 0.36 |
OR = Odds Ratio, CI = Confidence Interval.