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Table 2 Content validity index before and after expert ratings

From: Assessing the application of non-pharmacological interventions for people with dementia in German nursing homes: feasibility and content validity of the dementia care questionnaire (DemCare-Q)

Version 1 question no.

Indicated problem

Category

Initial I-CVI’s1

Revision

Final I-CVI’s2

1.

Response set

Completeness

.14

Addition of 4 items

.86

Reasonability

.75

1.0

11.

Response set

Completeness

.67

Addition of 2 items, deletion of 1 item, rewording of single items, addition of item examples

.86

Reasonability

.56

.86

12.

Question

Relevance

.67

Deleted

/

14.

Response set

Completeness

.63

Summarization of items, revision of items

.43

Reasonability

.38

.43

14. (Frequency)

Response set

Completeness

.75

Retained

/

16.

Question

Comprehensibility

.67

Reworded

1.0

Response set

Completeness

.50

Addition of 1 item

1.0

Reasonability

.56

1.0

20.

Response set

Reasonability

.67

Rewording and summarization of items

.71

Completeness

.75

.86

21.

Question

Comprehensibility

.63

Addition of examples

1.0

22.

Question

Comprehensibility

.56

Adaption of reference period

.86

23.

Response set

Completeness

.56

Addition of one item

1.0

  1. 1Threshold value for content validity.88 (based on eight rater judgments).
  2. 2Threshold value for content validity .86 (based on seven rater judgments).