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Table 7 Content validity of the dimension “Physical health status”

From: Development and evaluation of the content validity, practicability and feasibility of the Innovative dementia-oriented Assessment system for challenging behaviour in residents with dementia

 

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

   
  1. a I-CVI (content validity index) = number of experts providing a rating of 3 or 4/number of experts
  2. b pc (probability of chance occurrence) = [N!/A!(N-A)!] × 0.5N, N = number of experts; A = number of experts agreeing on a rating of 3 or 4
  3. c k* (modified kappa) = (I-CVI-pc)(1-pc)
  4. 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 (*)