Table 4.
Odds ratios (ORs) for elevated sera antibody titers of four exposed groups against reference strains, determined by univariate analysis.
| Group | OR (95% CI)a |
||||||
|---|---|---|---|---|---|---|---|
| Pdm09/H1N1 | CS/H1N1 | EA/H1N1 | CAN/H3N2 | AV/H5N1 | AV/H7N9 | AV/H9N2 | |
| Age | |||||||
| >39 (404) | 0.8 (0.6–1.0) | 1.7 (1.1–2.5) | 3.0 (1.5–5.9) | 2.0 (0.7–6.0) | 1.8 (0.5–6.1) | 2.7 (1.2–5.8) | 2.0 (1.1–3.5) |
| ≤39 (406) | Ref | ||||||
| Gender | |||||||
| Male (508) | 0.8 (0.6–1.1) | 2.1 (1.3–3.3) | 2.8 (1.3–5.9) | 0.5 (0.2–1.5) | 0.9 (0.3–3.2) | 1.0 (0.5–2.0) | 0.7 (0.4–1.2) |
| Female (302) | Ref | ||||||
| Occupation risk | |||||||
| Swine workers (171) | 1.2 (0.8–1.7) | 10.5 (5.4–20.3) | 11.7(4.0–34.1) | 1.0 (0.2–6.2) | 3.1 (0.1–93.1) | 1.0 (0.2–6.2) | 1.9 (0.6–6.3) |
| Poultry farm workers (150) | 1.1 (0.7–1.6) | 2.0 (0.9–4.5) | 1.8 (0.4–7.2) | 1.8 (0.4–8.9) | 10.8 (0.5–216.6) | 4.3 (1.1–16.7) | 6.6 (2.4–28.3) |
| LPM workers (105) | 0.9 (0.6–1.4) | 5.3 (2.5–11.1) | 5.4 (1.6–18.2) | 2.6 (0.5–12.9) | 20.9 (1.1–399.1) | 18.0 (5.2–62.6) | 15.4 (5.7–41.5) |
| Vet (120) | 1.3 (0.8–2.0) | 1.9 (0.8–4.6) | 2.2 (0.6–9.1) | 3.0 (0.7–13.6) | 9.0 (0.4–200.0) | 1.5 (0.2–8.9) | 1.3 (0.3–5.7) |
| General people (264) | Ref | ||||||
| Animal exposure | |||||||
| Any (546) | 1.1 (0.8–1.5) | 4.7 (2.5–8.7) | 5.5 (1.9–15.5) | 2.0 (0.6–7.4) | 20.1 (1.2–333.7) | 4.9 (1.5–16.2) | 5.2 (2.1–13.3) |
| None (264) | Ref | ||||||
| Pigs (171) | 1.1 (0.8–1.6) | 5.2 (3.4–7.9) | 5.6 (3.0–10.2) | 0.6 (0.1–2.6) | 0.4 (0.1–3.1) | 0.2 (0.1–1.0) | 0.4 (0.2–1.0) |
| No pigs (639) | Ref | ||||||
| Avian (255) | 0.9 (0.7–1.2) | 0.9 (0.6–1.4) | 0.8 (0.4–1.5) | 1.5 (0.5–4.2) | 4.5 (1.2–16.2) | 8.5 (3.6–20.0) | 7.4 (4.0–13.9) |
| No avian espoused (555) | Ref | ||||||
| House pets espoused (120) | 1.2 (0.8–1.8) | 0.5 (0.3–1.0) | 0.5 (0.2–1.5) | 2.1 (0.7–6.8) | 1.4 (0.3–6.4) | 0.4 (0.1–1.6) | 0.3 (0.1–1.0) |
| No house pets (690) | Ref | ||||||
Values shown in boldface are statistically significant (p<0.01). Pdm09/H1N1, CS/H1N1, EA/H1N1, CAN/H3N2, AV/H5N1, AV/H7N9 and AV/H9N2, abbreviated for A/Guangdong/1057/2010(H1N1), A/canine/Guangdong/1/2012(H1N1), A/swine/Guangdong/L6/2009(H1N1), A/swine/Guangdong/L5/2010(H3N2), A/duck/Anhui/1/2006(H5N1), A/pigeon/Shanghai/S1421/2013(H7N9) and A/chicken/Shanghai/10/2001(H9N2), respectively.
a
Odds ratio and 95% confidence interval compared to the control group.