Table 1.
Characteristics of influenza‐like illness (ILI)‐related emergency department (ED) visits and respiratory virus laboratory detections, including Pearson correlation coefficients, during non‐pandemic seasons, 2004–2008 and 2010–2014, Edmonton, Alberta and surrounding area
| Chief complaint or respiratory virus | No. (%) | Median no. per daya(SD, range) | Patient age (years, median, IQR) | Patient sex (No. female, %) | Correlation with ILI‐related ED visitsf |
|---|---|---|---|---|---|
| ILI‐related ED visits | |||||
| Cough | 59 832 | 20 (12.2, 1–125) | 8 (1–41) | 28 719 (48%) | – |
| Laboratory detections | |||||
| RSV | 5943 (40%) | 3 (4.1, 1–29) | 0 (0–2) | 2714 (46%) | .47 |
| Influenza A | 3813 (26%) | 2 (5.4, 1–57) | 37 (6–63)c | 1924 (51%)c | .61 |
| Parainfluenza | 2910 (19%) | 1 (1.3, 1–21) | 2 (0–18)c | 1301 (45%) | .18 |
| Adenovirus | 1372 (9%) | 1 (0.8, 1–5) | 1 (0–4)c | 529 (39%)c | .04 |
| Influenza B | 1224 (8%) | 2 (1.8, 1–12) | 13 (4–48)c | 598 (49%)d | .21 |
| Overall | 15 262b | 5 (7.2, 1–64) | 2 (0–35)e | 7066 (47%)e | – |
Excludes days with zero detections for the respiratory virus(es) in question.
From n=14 955 samples: 305 mixed samples contributed two detections each and one mixed sample contributed three detections.
P<.001 compared to detections for RSV (Wilcoxon Rank Sum test for age and chi‐square test for sex).
P<.05 compared to detections for RSV (chi‐square test).
n=38 detections were missing patient age and n=123 detections were missing patient sex.
All are statistically significant at P<.0001 except adenovirus at P<.05.
ILI, influenza‐like illness; RSV, respiratory syncytial virus.