Table 7.

Content validity of the dimension “Physical health status”

		Relevance of the questions						Clarity of the questions						Meaningfulness of the answers						Completeness of the answers
No	Content of the items	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationd	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationd	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationad	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationd
1	Physical impairment	9	9	1.0	0.002	1.0	****	9	8	0.89	0.018	0.89	****	-	-	-	-	-	-	-	-	-	-	-	-
2	Mobility-related impairment	10	10	1.0	0.001	1.0	****	10	7	0.70	0.117	0.66	***	10	9	0.90	0.010	0.90	****	10	7	0.70	0.117	0.66	***
3	Food intake	10	10	1.0	0.001	1.0	****	10	10	1.00	0.001	1.00	****	10	9	0.90	0.010	0.90	****	9	7	0.78	0.070	0.76	****
4	Limitations with bowel or bladder function	10	10	1.0	0.001	1.0	****	10	10	1.00	0.001	1.00	****	10	8	0.80	0.176	0.76	****	9	8	0.89	0.018	0.89	****
5	Other physical limitations	10	10	1.0	0.001	1.0	****	10	9	0.90	0.010	0.90	****	10	9	0.90	0.010	0.90	****	10	8	0.80	0.044	0.79	****
		S-CVI/AVE 1.0						S-CVI/AVE 0.90						S-CVI/AVE 0.88						S-CVI/AVE 0.79
		S-CVI/UA 1.0						S-CVI/UA 0.40						S-CVI/UA 0.00						S-CVI/UA 0.00

^a I-CVI (content validity index) = number of experts providing a rating of 3 or 4/number of experts

^b p_c (probability of chance occurrence) = [N!/A!(N-A)!] × 0.5^N, N = number of experts; A = number of experts agreeing on a rating of 3 or 4

^c k* (modified kappa) = (I-CVI-p_c)(1-p_c)

^d Evaluation criteria for level of content validity: relationship between I-CVI and k*; excellent validity = I-CVI ≥ 0.78 and k* >0.74 (****); good validity I-CVI < 0.78 and ≥ 0.60 and k* ≤ 0.74 (***); fair validity I-CVI < 0.6 and ≥ 0.40 and  k* ≤0.59 (**); poor validity I-CVI < 0.4 and k* <0.40 (*)