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Table 11 Content validity of the dimension “Personality & life style before the onset of dementia”

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 Evaluationd Number of experts Number of ratings of 3 or 4 I-CVIa pc b k* c Evaluationd
1 Personality prior to the onset of dementia 10 9 0.90 0.010 0.90 **** 9 8 0.89 0.018 0.89 **** 10 8 0.80 0.044 0.79 **** 10 7 0.70 0.117 0.66 ***
2 Stress and frustration tolerance 10 9 0.90 0.010 0.90 **** 10 8 0.80 0.044 0.79 **** 10 9 0.90 0.010 0.90 **** 10 8 0.80 0.044 0.79 ****
3 Coping with stressful situations before the onset of dementia 10 10 1.00 0.001 1.00 **** 10 8 0.80 0.044 0.79 **** 10 9 0.90 0.010 0.90 **** 10 9 0.90 0.010 0.90 ****
4 Past situations or events related to negative emotions 10 9 0.90 0.010 0.90 **** 10 9 0.90 0.010 0.90 **** 10 9 0.90 0.010 0.90 **** 10 10 1.00 0.001 1.00 ****
5 Past situations or events related to positive emotions 9 9 1.00 0.002 1.00 **** 9 9 1.00 0.002 1.00 **** 9 7 0.78 0.070 0.76 **** 9 9 1.00 0.002 1.00 ****
6 Leisure activities preferred by the resident prior to dementia 9 8 0.89 0.018 0.89 **** 9 9 1.00 0.002 1.00 **** 9 8 0.89 0.018 0.89 **** 9 8 0.89 0.018 0.89 ****
7 Type of job/housework before dementia 9 9 1.00 0.002 1.00 **** 9 9 1.00 0.002 1.00 **** 9 7 0.78 0.070 0.76 **** 9 8 0.89 0.018 0.89 ****
8 Important routine rhythms or established daily rituals 9 9 1.00 0.002 1.00 **** 9 9 1.00 0.002 1.00 **** 9 9 1.00 0.002 1.00 **** 8 8 1.00 0.004 1.00 ****
   S-CVI/AVE 0.95     S-CVI/AVE 0.92     S-CVI/AVE 0.87     S-CVI/AVE 0.90    
   S-CVI/UA 0.50     S-CVI/UA 0.50     S-CVI/UA 0.13     S-CVI/UA 0.38    
  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 < 0.5 and ≥ 0.40 and k* ≤0.59 (**); poor validity I-CVI < 0.4 and k* <0.40 (*)