A(H1N1)pdm09 | A(H3N2) | B/Yamagata | B/Victoria | ||
---|---|---|---|---|---|
Manifestation/outcome | N = 361 | N = 224 | N = 106 | N = 76 | P-value |
Signs/symptoms, n (%) | |||||
Fever | 350 (97.0) | 217 (96.9) | 104 (98.1) | 74 (97.4) | 0.924 |
Headache | 209 (57.9) | 110 (49.1) | 48 (45.3) | 52 (68.4) | 0.003 |
Malaise | 240 (66.5) | 114 (50.9) | 51 (48.1) | 60 (78.9) | < 0.001 |
Myalgia | 191 (52.9) | 73 (32.6) | 42 (39.6) | 35 (46.1) | < 0.001 |
Cough | 296 (82.0) | 155 (69.2) | 77 (72.6) | 66 (86.8) | < 0.001 |
Sore throat | 215 (59.6) | 160 (71.4) | 71 (67.0) | 56 (73.7) | 0.009 |
Dyspnea | 65 (18.0) | 9 (4.0) | 5 (4.7) | 5 (6.6) | < 0.001 |
Time from onset of symptoms to admission, n (%) | < 0.001 | ||||
1 day | 195 (54.0) | 115 (51.3) | 29 (27.4) | 31 (40.8) | |
2 days | 98 (27.1) | 58 (25.9) | 32 (30.2) | 13 (17.1) | |
3 days | 40 (11.1) | 31 (13.8) | 35 (33.0) | 16 (21.1) | |
≥ 4 days | 28 (7.8) | 20 (8.9) | 10 (9.4) | 16 (21.1) | |
Time from onset of symptoms to admission (days), median (range) | 1 (0–6) | 1 (0–6) | 2 (0–5) | 2 (0–5) | < 0.001 |
Length of hospitalization stay, n (%) a | < 0.001 | ||||
0–4 days | 124 (34.3) | 61 (27.2) | 22 (20.8) | 26 (34.2) | |
5 days | 85 (23.5) | 32 (14.3) | 14 (13.2) | 16 (21.1) | |
6–7 days | 100 (27.7) | 84 (37.5) | 39 (36.8) | 26 (34.2) | |
≥ 8 days | 52 (14.4) | 46 (20.5) | 30 (28.3) | 8 (10.5) | |
Length of hospitalization stay (days), median (range) | 5 (0–35) | 6 (0–14) | 6 (1–16) | 5 (0–11) | < 0.001 |
Admission to an intensive care unit, n (%) | 1 (0.3) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0.771 |
Pregnancy outcome, n (%) | |||||
Abortion (< 20 weeks) | 8 (2.2) | 3 (1.3) | 2 (1.9) | 0 (0.0) | 0.667 |
Stillbirth (≥ 20 weeks) | 2 (0.6) | 3 (12.5) | 4 (3.8) | 2 (2.6) | 0.050 |
Live delivery during the current admission | 31 (8.6) | 24 (10.7) | 14 (13.2) | 4 (5.3) | 0.261 |
Preterm (< 37 weeks gestational age) b | 9 (29.0) | 4 (16.7) | 1 (7.1) | 2 (50.0) | 0.177 |
Cesarean† | 3 (9.7) | 6 (25.0) | 2 (14.3) | 0 (0.0) | 0.391 |
Low birth weight (< 2500 g) c | 1 (3.2) | 1 (4.2) | 0 (0.0) | 1 (25.0) | 0.276 |