Adjusted odds ratio (95% CI) a | |||||
---|---|---|---|---|---|
Any influenza | A(H1N1)pdm09 | A(H3N2) | B/Yamagata | B/Victoria | |
Characteristic | N = 825 | N = 361 | N = 224 | N = 106 | N = 76 |
Age (in years) b | 1.02 (1.00–1.04) | 1.03 (1.01–1.06) | 1.00 (0.97–1.03) | 1.09 (1.04–1.13) | 0.96 (0.91–1.00) |
Trimester | |||||
First (0–13 weeks) | 1 | 1 | 1 | 1 | 1 |
Second (14–26 weeks) | 1.19 (0.92–1.53) | 1.17 (0.82–1.66) | 0.89 (0.58–1.35) | 1.34 (0.75–2.51) | 2.28 (1.10–4.74) |
Third (27–42 weeks) | 1.12 (0.86–1.46) | 0.82 (0.56–1.19) | 1.23 (0.82–1.87) | 1.57 (0.86–2.88) | 1.58 (0.72–3.44) |
Underlying conditions | |||||
No | 1 | 1 | 1 | 1 | 1 |
Yes | 1.56 (1.16–2.08) | 1.78 (1.19–2.67) | 1.91 (1.25–2.93) | 1.24 (0.66–2.34) | 2.01 (0.39–3.15) |