Fig. 1

Restricted spline curve shows the relationship between TSBT and AAC scores. Red line and red transparent area represent beta and 95% CI, respectively; the unit of TSBT is hours. β (95% CI) was adjusted based on Model 3 (sex, age, race, BMI, marital status, education, poverty level, smoking status, diabetes, and hypertension). AAC abdominal aortic calcification; TSBT total sedentary behaviour time; CI confidence interval