Table 1.

Structure of the call-detail records (CDRs) dataset before and after preprocessing.

Participant characteristics		Before preprocessing	After preprocessing
Number of participants, n (%)
	Total	26 (100)	21 (100)
	Female	20 (77)	16 (76)
	Male	6 (23)	5 (24)
Age in years
	Range	71-91	71-91
	Mean (SD)	84 (4)	83 (4)
Total number of outgoing calls		19,198	18,338
Average number of calls per individual
	1st quartile	285	481
	Median	590	710
	3rd quartile	944	1096