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Table 4 Univariate and multivariate regression analysis of the association of factors with death among pregnant women with confirmed pH1N1 influenza*
| Variables | Patients who survived (n = 317) | Patients who died (n = 77) | Pvalue | ORuadj (95% CI) | ORadj (95% CI) |
|---|---|---|---|---|---|
| Age, median years (IQR) | 24.8 (22.9-28.3) | 23.9 (21.7-28.3) | 0.10 | 0.95 (0.90-1.01) | |
| BMI, median (IQR) | 25.99 (23.20-29.26) | 27.37 (24.87-30.33) | 0.02 | 1.10 (1.01-1.17) | 1.26 (1.09-1.47) |
| Gestational age, median (IQR) | 32 (26-37) | 32 (26-38) | 0.86 | 0.97 (0.97-1.03) | 0.94 (0.86-1.03) |
| Comorbidity **(%) | 25/317 (7.9) | 6/77 (7.8) | 0.97 | 0.98 (0.39-2.50) | |
| Pneumonia (%) | 275/311 (88.4) | 75/77 (97.4) | 0.03 | 4.91 (1.16-20.86) | 0.68(0.02-2.39) |
| Symptoms and Lab findings | |||||
| PaO2/FiO2, median (IQR) | |||||
| PaO2/FiO2 ≥ 300 (%) | 62/164 (37.8) | 1/55 (1.8) | Referent | Referent | |
| PaO2/FiO2 201 to 300 (%) | 23/164 (14.0) | 2/55 (3.6) | 0.18 | 5.39 (0.47-62.33) | 2.05 (0.09-46.80) |
| PaO2/FiO2 ≤ 200 (%) | 79/164 (48.2) | 52/55 (94.5) | < 0.001 | 40.81 (5.49-303.51) | 27.16 (2.64-279.70) |
| APACHE II score, median (IQR) | 6 (3-10) | 12 (8-16) | < 0.001 | 1.13 (1.09-1.18) | 1.07 (0.98-1.18) |
| Dyspnoea (%) | 139/315 (44.1) | 58/76 (76.3) | < 0.001 | 4.08 (2.30-7.24) | 1.81 (0.47-7.05) |
| Hemoptysis (%) | 33/315 (10.5) | 21/75 (28.0) | < 0.001 | 3.32 (1.79-6.18) | 1.64 (0.37-7.27) |
| CNS symptom (%) | 29/314 (9.2) | 19/76 (25.0) | < 0.001 | 3.27 (1.71-6.24) | 2.99 (0.63-14.14) |
| AST (u/L), median (IQR) | 35 (23-65) | 96.10 (44.50-159.5) | < 0.001 | 1.007 (1.004-1.011) | 1.00 (0.99-1.00) |
