Table 2. Prevalence of hepatitis B infection per demographic characteristic.
| Characteristic | Positive | Tested | Prevalence (%) | Prevalence-Ratio† |
|---|---|---|---|---|
| (95% CI) | (95% CI) | |||
| Overall | 16 | 315 | 5.1 (2.9–8.1) | - |
| Sex | ||||
| Male | 9 | 128 | 7.0 (3.3–12.9) | 1.88 (0.72–5.13) |
| Female | 7 | 187 | 3.7 (1.5–7.6) | 1.00 |
| Age (years) | ||||
| 18–29 | 6 | 61 | 9.8 (3.7–20.2) | 1.00 |
| 30–39 | 6 | 127 | 4.7 (1.8–10.0) | 0.48 (0.16–1.48) |
| 40–49 | 2 | 67 | 3.0 (0.4–10.4) | 0.30 (0.05–1.26) |
| ≥ 50 | 2 | 60 | 3.3 (0.4–11.5) | 0.34 (0.05–1.40) |
| Marital Status | ||||
| Married | 12 | 245 | 4.9 (2.6–8.4) | 1.00 |
| Single | 2 | 48 | 4.2 (0.5–14.3) | 0.85 (0.14–2.99) |
| Widow or divorced | 2 | 22 | 9.1 (1.1–29.2) | 1.86 (0.30–6.27) |
| Professional cadre | ||||
| Physicians | 2 | 43 | 4.7 (0.6–15.8) | 1.00 |
| Nurses | 8 | 125 | 6.4 (2.8–12.2) | 1.38 (0.36–8.89) |
| Laboratory technicians | 2 | 26 | 7.7 (0.9–25.1) | 1.65 (0.21–13.10) |
| Auxiliary | 1 | 82 | 1.2 (0.0–6.6) | 0.26 (0.01–2.66) |
| Others* | 3 | 39 | 7.7 (1.6–20.9) | 1.65 (0.29–12.10) |
| Years of service | ||||
| Less than 1 year | 1 | 9 | 11.1 (0.3–48.2) | 2.45 (0.14–10.80) |
| 1–5 years | 4 | 63 | 6.3 (1.8–15.5) | 1.40 (0.40–3.95) |
| More than 5 years | 11 | 243 | 4.5 (2.3–8.0) | 1.00 |
| Hepatitis Vaccine (self-reported) | ||||
| 0 dose | 9 | 169 | 5.3 (2.5–9.9) | 1.00 |
| 1 dose | 2 | 32 | 6.3 (0.8–20.8) | 1.17 (0.19–4.30) |
| 2 doses | 4 | 56 | 7.1 (2.0–17.3) | 1.34 (0.38–3.95) |
| 3 doses | 0 | 42 | 0.0 (0.0–8.4) | 0.22 (0.00–1.69)** |
| Unknown | 1 | 16 | 6.3 (0.2–30.2) | 1.17 (0.07–5.70) |
| Exposure to accidental needlestick or blood or other blood fluids | ||||
| 0 times | 7 | 174 | 4.0 (1.6–8.1) | 1.00 |
| 1 time | 5 | 63 | 7.9 (2.6–17.6) | 1.97 (0.60–5.96) |
| 2 times | 3 | 35 | 8.6 (1.8–23.1) | 2.13 (0.48–7.27) |
| 3 or more times | 1 | 43 | 2.3 (0.1–12.3) | 0.58 (0.03–3.13) |
*Other providers with non-university degrees, including dental and oral care, eye care, preventive medicine, instrumentalists, anesthesiology technicians, ophthalmology technicians, and imageology technicians.
**The zero count was replaced as 0.5 to compute the prevalence ratio.
† Prevalence Ratio (PR) is the division of two proportions (from the prevalence column). E.g. for the sex variable, if we choose the female category as the reference, the prevalence ratio is 7.0313/3.7433 = 1.88. The 95% CI is estimated through the log-binomial regression.