TB = tuberculosis; yr = years old; a = adjusted; OR = odds ratio; NS = not significant; NA = not assessed or not mentioned; HR = hazard ratio. Multicentric BOLD study, 14 countries. βFor 10-year change. §Passive smoking. Men/women. ¥99.5% of population was exposed to biomass fuel. Age range in years, (≥50 vs. <50) years. β,βFor 1-year change. €Difference in forced expiratory volume at the first second’s percent of predicted, between exposed and nonexposed.