Figure 4
Subgroup analyses for systolic blood pressure according to the Athens insomnia scale. EEG electroencephalogram, CI confidence interval, SD standard deviation. Model 1 is adjusted for age and sex; Model 2 is further adjusted for body mass index, smoking history, and drinking habits; and Model 3 is further adjusted for the 3% oxygen desaturation index. In Model 3, two participants with missing values of 3% oxygen desaturation index are excluded. Each box plot shows the median, interquartile range, and minimum and maximum scores. Two patients receiving treatment for hypertension and four patients with missing values of Athens insomnia scale are excluded.
