Estimated number of CT scans per patient as a function of the SES measured using the UVSI and its 5 constituent indicators.

<p>Results for continuous measure (solid line), categorical variable in quintiles (step function) and cubic spline model (dashed curve), adjusted for sex and age at the time of the last CT scan and including the autonomous community of residence as a random effect. Scatter points at the bottom are the observed values of the SES measure.