Reliability, validity and clinical correlates of the Quality of Life in Alzheimer’s disease (QoL-AD) scale in medical inpatients

Table 4 Internal consistency

QoL-AD item	Item-total correlations patient	Item-total correlations caregiver	Item-total correlations composite
Physical	0.31	0.45	0.33
Energy	0.38	0.51	0.35
Mood	0.47	0.58	0.54
Living situation	0.28	0.54	0.51
Memory	0.13	0.52	0.27
Family	0.36	0.35	0.33
Marriage	0.34	0.58	0.41
Friends	0.33	0.62	0.44
Self as a whole	0.40	0.62	0.45
Ability to do chores	0.49	0.52	0.53
Ability to do things for fun	0.56	0.63	0.64
Money	0.27	0.31	0.24
Life as a whole	0.37	0.66	0.53
Cronbach’s alpha	0.742	0.863	0.797

Corrected item-total correlations for all items and Cronbach’s alpha, for patient ratings, caregiver ratings and the composite score

ISSN: 1477-7525