Figure 2.

Kaplan-Meier curves of risk for all-cause death in smokers according to CT imaging subtypes. P values were calculated with the use of a log-rank test. BD = bronchial airway disease; diff = diffuse; mod = moderate; Normal = no emphysema or airway abnormality; quant = quantitative; quant w/o visual = discordant: quantitative emphysema without visual emphysema; SAD = small airway disease; visual w/o quant = discordant: visual emphysema without quantitative emphysema. See Figure 1 legend for expansion of other abbreviations.