Fig. 1
From: Alternative duty work as workplace-initiated procedure to reduce sickness absence
Participating cities and follow-up periods. Blue box indicates study wave 1: cases (City A) and controls (B-C) with sickness absence follow-up from 1.1.2012 (T1) to 31.12.2016 (T2). Red box indicates study wave 2: cases (City D) and controls (B-C) with sickness absence follow-up from 1.1.2014 (T1) to 31.12.2018 (T2). Grey bar indicates the wash-out period for the intervention (=the year of implementation of alternative duty work procedure)