Skip to main content

Table 3 Demographic descriptive statistics of WNV infected subjects

From: The direct healthcare costs attributable to West Nile virus illness in Ontario, Canada: a population-based cohort study using laboratory and health administrative data

VariableWNV infected N (%)WNV infected, WNND N (%)WNV infected, non-WNND N (%)
Subjects1540 (100)317 (100)1223 (100)
Mean age at index date, years ± SD49.1 ± 18.453.5 ± 20.947.3 ± 17.5
< 526 (1.7)6 (1.9)20 (1.6)
5–24130 (8.4)29 (9.1)102 (8.3)
25–44444 (28.8)60 (18.9)385 (31.5)
45–54339 (22.0)51 (16.1)287 (23.5)
55–64303 (19.7)65 (20.5)239 (19.5)
65–74178 (11.6)54 (17.0)122 (10.0)
75–84104 (6.8)44 (13.9)60 (4.9)
≥8516 (1.0)8 (2.5)8 (0.7)
Sex, female778 (50.5)128 (40.4)650 (53.1)
Rural residence
 Rural61 (4.0)<1046 (3.8)
 Non-rural1479 (96.0)306 (96.5)1177 (96.2)
 Missing ≤5 
Income quintile
 1 (lowest)235 (15.3)45 (14.2)198 (16.2)
 2312 (20.3)67 (21.1)227 (18.6)
 3319 (20.7)70 (22.1)265 (21.7)
 4314 (20.4)61 (19.2)235 (19.2)
 5 (highest)360 (23.4)74 (23.3)297 (24.3)
  1. Abbreviations: standard deviation, SD, West Nile neuroinvasive disease, WNND; West Nile virus, WNV