[Time series of non-work related sickness absence incidence by subgroups of duration (2009-2018)].

Objective: We describe time trend incidence (2009-2018) of non-work related Sickness Absence(SA) segmented by duration of episodes in Spain.

Methods: We used SA cases from a health insurance company ("mutua") in Spain. Overall non-work related SA incidence and incidence by duration of episodes (1-3 days, 4-15 days, 16-30 days, 31-90 days and> 90 days) were obtained.

[The analysis of sickness absence incidence by subgroups of duration].

Background: We describe the usefulness of performing an analysis of sickness absence (SA) incidence, segmented by the duration of episodes, in comparison with the more common analysis that considers the overall incidence of SA without segmentation.

Methods: We used data from a health insurance company ("mutua") in Spain during 2011 (230,332 episodes, 752,906 workers) and non-work related SA as a case study. We compared the overall incidence of SA and incidence segmented by duration of episodes: short (≤ 15 days), medium (16-30 and 31-90 days) and long (> 90 days).