. 2019 Jun 19;74(12):1980–1986. doi: 10.1093/gerona/glz155

Table 3.

Model Fit (–2LL) for Cox Survival Models With Functional Aging Index (FAI) and Frailty Index (FI) Predicting Entry Into Care and Mortality

Model	Number of parameters	Entry into care	Mortality
1. Age, sex, age × sex	3	1,572.39	5,511.63
2. Age, sex, age × sex, FAI, FAI × sex	5	1,554.68^a	5,474.61^a
3. Age, sex, age × sex, FI, FI × sex	5	1,563.94	5,511.32
4. Age, sex, age × sex, FI, FI × sex, FAI, FAI × sex	7	1,550.57^b	5,469.52^b

^aModel fit is significantly different from model 1 at p < .01.

^bModel fit is significantly different from model 3 at p < .01.