Fig. 7.

Risk of acute hospitalisations and mortality in individuals according to lung function in the general population. Based on the Copenhagen General Population Study. Cox proportional hazard models used left truncation and age as underlying timescale in restricted cubic splines with median as the reference and three knots chosen according to Harrell's recommendation at the 10th, 50th, and 90th percentiles. Individuals at the bottom and top percentile were included in the actual analyses but excluded from the graphs for visual purposes. Analyses were multivariable adjusted for age (as timescale), sex, body mass index, smoking status, cumulative tobacco consumption (pack-years), socioeconomic status, asthma, and treatment with airway medication.