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. 2015 Sep 25;181(3):230–235. doi: 10.1016/j.vetmic.2015.09.016

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 (1.12.5) 3.0 (1.55.9) 2.0 (0.7–6.0) 1.8 (0.5–6.1) 2.7 (1.25.8) 2.0 (1.13.5)
≤39 (406) Ref



Gender
Male (508) 0.8 (0.6–1.1) 2.1 (1.33.3) 2.8 (1.35.9) 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 (5.420.3) 11.7(4.034.1) 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 (1.116.7) 6.6 (2.428.3)
LPM workers (105) 0.9 (0.6–1.4) 5.3 (2.511.1) 5.4 (1.618.2) 2.6 (0.5–12.9) 20.9 (1.1399.1) 18.0 (5.262.6) 15.4 (5.741.5)
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 (2.58.7) 5.5 (1.915.5) 2.0 (0.6–7.4) 20.1 (1.2333.7) 4.9 (1.516.2) 5.2 (2.113.3)
None (264) Ref
Pigs (171) 1.1 (0.8–1.6) 5.2 (3.47.9) 5.6 (3.010.2) 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 (1.216.2) 8.5 (3.620.0) 7.4 (4.013.9)
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.