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. 2023 Apr 19;52(2):e137-e151.
doi: 10.1093/ije/dyac156.

Cohort Profile: The Ontario Health Study (OHS)

Victoria A Kirsh  1   2 , Kimberly Skead  1   3 , Kelly McDonald  1 , Nancy Kreiger  2   4 , Julian Little  5 , Karen Menard  6 , John McLaughlin  2 , Sutapa Mukherjee  7 , Lyle J Palmer  8 , Vivek Goel  2   9 , Mark P Purdue  10 , Philip Awadalla  1   2   3
Affiliations

Cohort Profile: The Ontario Health Study (OHS)

Victoria A Kirsh et al. Int J Epidemiol. .
No abstract available

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Conflict of interest statement

None declared.

Figures

Figure 1
Figure 1
Geographical distribution of participants by Ontario public health unit, based on self-reported postal code at enrolment. The Ontario Health Study (OHS) has representation across each of Ontario’s public health units, with enrolment greatest in catchment areas for the City of Toronto Health Unit (n = 45 367), followed by the City of Ottawa Health Unit (n = 24 194) and Peel Regional Health (n = 17 114). Enrolment is roughly proportional to the size of the populations served
Figure 2
Figure 2
Distribution of the measures of O3, PM2.5, night-time light and greenness. From (a) to (d) are ozone (O3), fine particulate matter (PM2.5), night-time light and greenness, respectively. The left panel for each subfigure is the annual average concentrations for all of Canada (source: canuedata.ca/map.php), in which the filled circles in different colours are quintiles of the distribution. The right panel for each subfigure is the frequency distribution (%) in the Ontario Health Study (OHS)
See this image and copyright information in PMC

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