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Table 4 Mann–Whitney U-test comparing the change of knowledge and attitudes towards dementia between those provided and did not provided voluntary services

From: The effects of involvement in training and volunteering with families of people with dementia on the knowledge and attitudes of volunteers towards dementia

  Did not provide services (n = 30) Provided services (n = 77) Mann–Whitney U Z p-valuea
Median [IQR]
Alzheimer’s Disease Knowledge Scale
 Life impact sub-score 0 [0 – 0] 0 [0 – 1] 927.00 -1.82 .069
 Risk factor sub-score 0 [0 – 0] 0 [0 – 1] 890.50 -1.99 .046
 Symptom sub-score 0 [0 – 0] 0 [0 – 1] 945.00 -1.72 .085
 Treatment and management sub-score 0 [0 – 0] 0 [0 – 1] 995.50 -1.25 .212
 Assessment and diagnosis 0 [0 – 0] 0 [0 – 0] 1138.00 -0.14 .891
 Caregiving sub-score 0 [0 – 0] 0 [0 – 1] 953.00 -1.57 .116
 Course sub-score 0 [0 – 0] 0 [-1.0 – 0.5] 1095.50 -1.57 .645
 Total score 0 [0 – 0] 0 [0 – 3] 806.00 -2.56 .011
Dementia Attitudes Scale
 Comfort sub-score 0 [0 – 0] 0 [-1.5—6] 1101.00 -0.39 .697
 Knowledge sub-score 0 [0 – 0] 0 [-2.5—5] 838.00 -2.24 .025
 Total score 0 [0 – 0] 0 [0 – 10] 769.50 -2.73 .006