Table 1 Description of the study area, air pollution level, and district-level covariates.
From: Multiple air pollutant exposure and lung cancer in Tehran, Iran
Number of districts | 22 |
|---|---|
Number of lung cancer patients | 1653 |
Age of patients (year) | |
Median (1st–3st quartile range) | 65.5 (60–71) |
Gender of patients (male) | |
Percent (number) | 70.1 (1158) |
Annual mean air pollutants | Median (1st–3st quartile range) |
PM10 (μg/m3) | 85.42 (65.5–99.9) |
SO2 (ppb) | 50.82 (32.9–61.7) |
NO2 (ppb) | 45.46 (41.6–50.2) |
NO (ppb) | 74.02 (55.6–98.5) |
NOX (ppb) | 112.21 (92.1–137.2) |
Benzene (μg/m3) | 9.05 (8.2–9.9) |
Toluene (μg/m3) | 26.35 (23.6–29.9) |
Ethylbenzene (μg/m3) | 6.49 (5.8–7.2) |
p-xylene (μg/m3) | 6.04 (5.6–6.6) |
o-xylene (μg/m3) | 6.60 (5.9–7.6) |
m-xylene (μg/m3) | 11.85 (10.4–13.4) |
TBTEX (μg/m3) | 64.68 (58.65–70.90) |
District level variables | Median (1st–3st quartile range) |
Total population (persons) | 319,443 (263,536–421,225) |
Life expectancy (year) | 75.9 (75.4–76.7) |
Population density (per km2) | 158.5 (127.5–208.1) |
Urban green space, per capita (m2 per 1000 people) | 13.9 (10.7–18.0) |
Socioeconomic status* | 49.95 (44.21–53.34) |
Smoking prevalence in men (%) | 15.7 (15.1–16.7) |
Smoking prevalence in women (%) | 0.79 (0.67–1.18) |
