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:We also estimated the prevalence of other risk factors for falls and fractures, including osteoporosis, Parkinson’s disease, ataxia, visual impairment, deafness and delirium, using ICD-10-AM codes also tested on the VAED [25].
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