Table 1 Demographic characteristics related to hepatitis B virus infection among blood donor candidates in Luanda, Angola.
Independent variables | N (%) | Active Hepatitis B Virus infection (HBsAg) | Prevalence ratio (PR) | |||
|---|---|---|---|---|---|---|
Non-reactive (%; 95% CI) | Reactive (%; 95% CI) | P-value | PR (95% CI) | P-value | ||
Overall | 96,654 (100) | 86,986 (90.0; 89.8–90.2) | 9668 (10.0; 9.4–10.6) | |||
Age (years), Mean ± SD | 34.0 ± 8.69 | 34.2 ± 8.74 | 32.7 ± 8.08 | < 0.001 | ||
Age distribution | ||||||
18–29 yrs | 34,253 (35.4) | 30,346 (88.6; 88.2–89.0) | 3907 (11.4; 10.4–12.4) | < 0.001 | 1.52 (1.43–1.60) | < 0.001 |
30–40 yrs | 41,604 (43.0) | 37,408 (89.9; 89.6–90.2) | 4196 (10.1; 9.19–11.0) | 1.34 (1.27–1.42) | < 0.001 | |
>40 yrs | 20,797 (21.5) | 19,232 (92.5; 92.1–92.9) | 1565 (7.50; 6.2–8.8) | 1.00 | ||
Gender | ||||||
Female | 9920 (10.3) | 9166 (92.4; 91.9–92.9) | 754 (7.60; 5.71–9.49) | < 0.001 | 1.00 | |
Male | 86,734 (89.7) | 77,820 (89.7; 89.5–89.9) | 8914 (10.3; 9.67–10.9) | 1.35 (1.26–1.45) | < 0.001 | |
Occupation | ||||||
Unemployed | 6736 (7.0) | 6494 (96.4; 96.0–96.9) | 242 (3.6; 1.25–5.95) | < 0.001 | 1.00 | |
Employed | 73,961 (76.5) | 66,523 (89.9; 89.7–90.1) | 7438 (10.1; 9.42–10.8) | 2.80 (2.47–3.17) | < 0.001 | |
Student | 15,957 (16.5) | 13,969 (87.5; 87.0–88.1) | 1988 (12.5; 11.1–14.0) | 3.47 (3.04–3.95) | < 0.001 | |
Residence | ||||||
Non-urbanized | 93,390 (96.6) | 83,999 (89.9; 89.7–90.1) | 9391 (10.1; 9.49–10.7) | 0.003 | 1.19 (1.06–1.33) | 0.004 |
Urbanized | 3264 (3.4) | 2987 (91.5; 90.5–92.5) | 277 (8.5; 5.22–11.8) | 1.00 | ||
Marital status | ||||||
Unmarried | 89,695 (92.8) | 80,488 (89.7; 89.5–89.9) | 9207 (10.3; 9.68–10.9) | < 0.001 | 1.00 | |
Married | 6959 (7.2) | 6498 (93.4; 92.8–94.0) | 461 (6.6; 4.33–8.87) | 0.65 (0.59–0.71) | < 0.001 | |
Year of diagnosis | ||||||
2018 | 16,391 (17.0) | 14,629 (89.3; 88.8–89.8) | 1762 (10.7; 9.26–12.1) | < 0.001 | 1.17 (1.10–1.24) | < 0.001 |
2019 | 16,356 (16.9) | 14,732 (90.1; 89.6–90.6) | 1624 (9.9; 8.45–11.4) | 1.08 (1.02–1.15) | 0.014 | |
2020 | 18,722 (19.4) | 16,884 (90.2; 89.8–90.7) | 1838 (9.8; 8.44–11.2) | 1.07 (1.01–1.13) | 0.029 | |
2021 | 22,192 (23.0) | 19,861 (89.5; 89.1–89.9) | 2331 (10.5; 9.26–11.7) | 1.14 (1.08–1.21) | < 0.001 | |
2022 | 22,993 (23.8) | 20,880 (90.8; 90.4–91.2) | 2113 (9.2; 7.97–10.4) | 1.00 | ||
