Table 2. Characteristics of Patient and Seasonal Epidemics of Respiratory Viruses in Alberta, Canada, 2005-2013.
| Characteristic | Median (IQR) | |||||
|---|---|---|---|---|---|---|
| RSV | hMPV | HCoV | ||||
| 229E | NL63 | OC43 | HKU1 | |||
| Patients | ||||||
| No. of patients | 24 336 | 8647 | 1091 | 1523 | 1385 | 627 |
| Total No. of specimens | 24 962 | 8774 | 1105 | 1540 | 1395 | 633 |
| Age, y | 0.990 (0.330-2.78) | 3.23 (0.930-49.0) | 32.3 (2.65-55.3) | 2.24 (0.575-35.1) | 13.2 (0.84-65.5) | 4.78 (0.792-46.9) |
| Sex, No. (%)a | ||||||
| Female | 11 595 (47.1) | 4314 (50.0) | 544 (49.5) | 718 (47.0) | 702 (50.5) | 302 (48.6) |
| Male | 12 741 (52.9) | 4333 (50.0) | 547 (50.5) | 805 (53.0) | 683 (49.5) | 325 (51.4) |
| Seasonal epidemics | ||||||
| No. of cases per season | ||||||
| Odd | 1340 (1310-1610) | 1130 (962-1360) | 159 (141-159) | 78.0 (58.2-109) | 52.5 (34.8-70.7) | 120 (112-202) |
| Even | 2600 (2500-2900) | 423 (331-460) | 32.8 (26.5-86.8) | 245 (207-258) | 204 (198-262) | 15.6 (12.0-16.5) |
| Ratio of high to low incidence seasons | 1.86 (1.62-1.9) | 2.66 (2.61-2.99) | 5.68 (4.46-6.45) | 3.27 (2.6-4.65) | 3.68 (3.32-6.7) | 7.5 (6.81-21.5) |
| Mean weekly cases (overall) | 41.3 (27.1-49.5) | 12.4 (8.31-20.9) | 2.37 (0.635-3.06) | 2.69 (1.92-4.71) | 1.67 (1.01-3.81) | 1.16 (0.312-2.23) |
| Model fit, SE of model, cases/wk | 23.0 | 12.0 | 3.93 | 3.49 | 4.33 | 3.06 |
Abbreviations: HCoV, human coronavirus; hMPV, human metapneumovirus; IQR, interquartile range; RSV respiratory syncytial virus.
a
Sex was unknown for 495 patients (1.3%).