Establishing content validity for a composite activities-specific risk of falls scale:linkage between fear of falling and physical activity

Table 4 The corresponding relations among FoF, PA, and CARF scores calculated using different formulae

Factors	FoF	PA	CARF (1)^	CARF (2)^*	CARF (3)^	CARF (4)^
	0	4	0	0	0	0
Scores	0	3	1	1	1	1
	0	2	2	2	2	2
	0	1	3	3	3	3
	0	0	4	4	4	4
	1	4	5	3	2.3	2
	1	3	5	3.5	3	2.75
	1	2	5	4	3.7	3.5
	1	1	5	4.5	4.3	4.25
	1	0	5	5	5	5
	2	4	10	6	4.7	4
	2	3	9	6	5	4.5
	2	2	8	6	5.3	5
	2	1	7	6	5.7	5.5
	2	0	6	6	6	6
	3	4	15	9	7	6
	3	3	13	8.5	7	6.25
	3	2	11	8	7	6.5
	3	1	9	7.5	7	6.75
	3	0	7	7	7	7
	4	4	20	12	9.3	8
	4	3	17	11	9	8
	4	2	14	10	8.7	8
	4	1	11	9	8.3	8
	4	0	8	8	8	8

FoF fear of falling, PA physical activity, CARFS Composite Activities-specific Risk of Falls Scale.
^: CARF value is calculated by the FOF (A) and PA (B) values using a formula of C = A+(4-B) + A × B/k, 1/k is a weight coefficient, which was 1 for CARF (1), 1/2 for CARF (2), 1/3 for CARF (3), 1/4 for CARF (4).
*: the one with the most reasonable correlations with FoF and PA all professionals chose
The CARF score in gray cells is only determined by degree of FoF but not affected by frequency of PA.

ISSN: 1471-2318