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Table 1 Characteristics of study participants

From: Exhaled carbon monoxide: a non-invasive biomarker of short-term exposure to outdoor air pollution

Characteristic Summary
Age (years) - mean (SD) 42.2 (8.4)
Income per day ($)a – mean (SD) 7.3(2.7)
Marital status n (%)
 Married 150(98)
 Unmarried (single or widow) 3(2)
Education level n (%)
 None 22(14.4)
 Primary school 75(49.1)
 College 21(13.7)
 High school 32(20.9)
 University 3(1.9)
Biomass exposure n (%) 144(94.7)
Exposure to tobacco smoke n (%) 51(33.3)
Any co-morbidity n (%) 29(19)
Abnormal Lung function n (%) 23(15)
  1. a1$ = 500XOF (Local currency in Benin)