Fig. 1From: Long-term sickness absence among young and middle-aged workers in Norway: the impact of a population-level interventionFlowchart, showing study population and intervention. *Excluded if they had missing information of IA status or was working in a company that had signed the IA Agreement after 2003 or a company had left the IA Agreement prior to 2005. For those present in both years were excluded if they had changed from intervention to control group or vice versaBack to article page