Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:Overall, findings are similar to data reported internationally, for example, of poorer self-reported health (Pappas et al. 2005, Malinauskiene et al. 2011), obesity (Bogossian et al. 2012, Kyle et al. 2016), pain and inadequate sleep (Bjorvatn et al. 2012, Chiou et al. 2013).
Category: