Table 2.
Baseline characteristics of study subjects and their neighborhoods
| Characteristics of the cohort | COPD | Asthma | Lung cancer a | |||
|---|---|---|---|---|---|---|
| Total cohort population | Incident cases | Total cohort population | Incident cases | Total cohort population | Incident cases | |
| Number | 1,105,258 | 74,543 | 1,057,722 | 87,141 | 1,039,128 | 12,908 |
| % | ― | 6.7 | ― | 8.2 | ― | 1.2 |
| Individual risk factors at time of entry | ||||||
| Age, years (SD) | 51.4 (15.3) | 62.2 (13.5) | 51.8 (15.4) | 51.8 (14.7) | 50.7 (14.6) | 60.0 (11.0) |
| Men (%) | 47 | 52.5 | 47.8 | 40.2 | 46.9 | 54.9 |
| Pre-existing comorbidity (%) | ||||||
| Diabetes | 6.8 | 11.4 | 6.8 | 7.3 | 6.3 | 8.0 |
| Chronic obstructive pulmonary disease (COPD) | ― | ― | 1.7 | 4.2 | 2.0 | 8.0 |
| Asthma | 6 | 15.2 | ― | ― | 6.7 | 8.5 |
| Acute myocardial infarction (AMI) | 0.7 | 1.5 | 0.7 | 0.7 | 0.6 | 1.2 |
| Hypertension | 20.8 | 33.8 | 20.8 | 23.4 | 19.9 | 26.8 |
| Congestive Heart Failure (CHF) | 1.7 | 4.4 | 1.9 | 1.9 | 1.2 | 1.9 |
| Cancer | 3.7 | 6.6 | 3.8 | 3.5 | 3.0 | ― |
| Area level risk factors from Canadian Census at the census tract level at baseline | ||||||
| Percentage of the population 15 years of age and older with less than a high school education | 32 | 34.2 | 31.9 | 33.3 | 32.0 | 33.8 |
| Percentage of the population 15 years of age and older without employment | 10.3 | 10.9 | 10.3 | 10.9 | 10.3 | 10.8 |
| Percentage of recent immigrants | 11.1 | 10.6 | 11 | 11.5 | 11.1 | 10.8 |
| Average household income with all ages (in $1000 CAN) (SD) | 62.1 (37.4) | 57.9 (34.8) | 62.2 (37.6) | 58.9 (35.2) | 62.0 (37.3) | 57.8 (33.6) |
SD standard deviation
aLung cancer cohort was followed from April 1, 2001 to December 31, 2012