Fig. 4

Joint association of ALI and serum vitamin D level with all-cause and respiratory disease mortality among US asthma patients aged 20 years or older, NHANES, 2001–2018. (A) All-cause mortality. (B) Respiratory disease mortality. The solid symbols indicate HRs, and the error bars indicate 95% CIs. Abbreviations: ALI: advanced lung cancer inflammation index; NHANES: the National Health and Nutrition Examination Survey; HR: hazard ratio; CI: confidence interval