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:[5, 8, 38‚Äì40] We identified a higher prevalence of multimorbidity among the most affluent groups, which contrasts with some earlier studies from LMICs.[5, 36] This could be due to self-reporting of NCD status in our data, as respondents from higher socioeconomic background have better access to health services resulting in better diagnoses of their NCDs[37].
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