Table 2. Distribution of modified frailty index cohorts by patient age.

Age (% of total sample)	mFI
	0	1	2	3	4+
< 40 (40.70%)	49,603	3,523	691	157	65
41–60 (30.37%)	24,044	9,990	3,907	1,474	908
61–80 (21.58%)	6,609	9,116	6,275	3,617	3,037
> 81 (6.02%)	824	2,372	2,202	1,400	1,200
Missing (1.31%)	170	554	539	311	177

Abbreviation: mFI, modified frailty index.