Table 1.
Explanatory variables in final logistics model
| Variable | Type | Coding |
|---|---|---|
| Demographic | ||
| Age of respondent | Categorical | 18-24* vs 25-44, 45-64, 65+ |
| Gender | Categorical | Male* vs Female |
| Exposure | ||
| Nitrogen dioxide (NO2) | Continuous | |
| Sulphur dioxide (SO2) | Continuous | |
| Benzene, toluene, ethylbenzene and xylenes (BTEX) | Continuous | |
| Gas, dust, fumes and pesticides (outdoor exposure) | Continuous | |
| Pets, carpets, rugs and fireplace (indoor exposure) | Continuous | |
| Socioeconomic | ||
| Marital status | Categorical | Partner* vs No partner |
| High school graduate (education) | Categorical | Yes* vs No |
| Below Low Income Cut Off | Categorical | No* vs yes |
| Employment status | Categorical | Employed*, Other, Unemployed |
| Children under 18 (children) | Categorical | No* vs yes |
| Housing tenure | Categorical | Owned* vs rented |
| Housing condition | Categorical | Sastisfactory* vs needs repair |
| Health Behaviour | ||
| Frequency of monthly alcohol use | Continuous | |
| Regular smoker | Categorical | No* vs Yes |
| Hours of weekly exercise | Continuous | |
| Voluntary Medical Check-up | Categorical | No* vs Yes |
| Community & Environmental Perception | ||
| Odour annoyance | Continuous | 0-10 |
| Aware that Sarnia is considered in an Area of Concern (awareness) | Categorical | No* vs Yes |
| Believe odours/pollution cause health problems (pollution health) | Categorical | No* vs Yes |
| Community satisfaction | Categorical | Dissatisfied* vs Satisfied |
| Health Care | ||
| Health care provider travel and wait times (Care availability) | Categorical | ≤ 20 min* vs > 20 min |
| Health Status | ||
| Physician diagnosed chronic health problems (chronic conditions) | Continuous | |
| Health problems from pollution-induced stress (stress symptoms) | Continuous | |
| Cardinal health problems of pollution (cardinal symptoms) | Continuous | |
| Back- or joint-pain and easy bruising (control symptoms) | Categorical | None* vs any |
| Above cut-point 4 positive responses on General Health Questionnaire | Categorical | No* vs Yes |
| Self-rated health compared to other people same age | Categorical | Good or better* vs Fair/poor |
| Ability to cope with daily problems (coping) | Categorical | Good or better* vs Fair/poor |
| Outcomes | ||
| Health Care Access | ||
| Regular health care provider or family physician (GP Access) | Categorical | Yes* vs No |
| Health Care Utilization | ||
| General practitioner use in the past 2 weeks (GP Use) | Categorical | No* vs Yes |
* Reference category.