Use of laboratory and administrative data to understand the potential impact of human parainfluenza virus 4 on cases of bronchiolitis, croup, and pneumonia in Alberta, Canada

Table 2 Descriptive analysis of all combined hPIV cases laboratory and public health linked cases 2010–2013

	All cases (n, %) N = 2300
hPIV1	617 (27)
hPIV2	252 (11)
hPIV3	1067 (46)
hPIV4	364 (16)
Median age years (range)	2 (0.01–103)
Age
0–1 years	1049 (46)
2–4 years	386 (17)
5–8 years	154 (7)
9–11 years	32 (1.4)
12–17 years	52 (2.3)
18–64 years	367 (16)
65 + years	259 (11)
Unknown	1 (0.04)
Gender
Male	1196 (52)
Female	1090 (47)
Unknown	2 (1)
Non hospitalized (Family Doc or ER visit with no inpatient stay)	1332 (58)
Hospitalized	968 (42)
Croup	248 (11)
Bronchiolitis	305 (13)
Pneumonia	377 (16)
Mixed cases that have Croup Bronchiolitis and Pneumonia	103 (5)
Other clinical or respiratory disease	1267^a (55)

51,888 negative specimens were excluded from analysis as the goal of this study was to compare the distribution of ICD9 codes for croup, bronchiolitis and pneumonia for hPIV1–4
^a These cases had a respiratory disease ICD-9 code that was not specific for croup, bronchiolitis or pneumonia. Out of 1267 cases, 835 (63 %) were non-hospitalized

ISSN: 1471-2334