Detecting acute distress and risk of future psychological morbidity in critically ill patients: validation of the intensive care psychological assessment tool

Table 2 Mokken scaling (non-parametric factor analysis) of the intensive care psychological assessment tool (IPAT) (day 1) demonstrating that 10 of 14 original items form a scale

IPAT items forming scale	IPAT questions	H
IPAT8	Have you been feeling hopeless?	0.59
IPAT5	Have you been feeling tense?	0.59
IPAT7	Have you been feeling panicky?	0.55
IPAT11	Have you felt that people were deliberately trying to harm or hurt you?	0.52
IPAT12	Do upsetting memories of intensive care keep coming into your mind?	0.49
IPAT6	Have you been feeling sad?	0.46
IPAT4	Has it been difficult to sleep?	0.44
IPAT1	Has it been hard to communicate?	0.41
IPAT10	Have you had hallucinations (seen or heard things you suspect were not really there)?	0.38
IPAT9	Have you felt disorientated (not quite sure where you are)?	0.37

H, Loevinger’s coefficient. The remaining four items had H <0.30, and were therefore excluded.

ISSN: 1364-8535