Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition

Journal of Patient-Reported Outcomes

Table 1 Data on demographics, Insomnia Severity Index and EQ-5D (n = 249)

Age, mean [SD] (range)	58.2 [13.5] (21–90)
Gender, n [%]
Male	91 [36.5]
Female	158 [63.5]
Education, n [%]
Less than 10 years	38 [15.3]
Youth education programme	9 [3.6]
Medium long education	150 [60.3]
Long education	21 [8.4]
Other (vocational education, etc.)	31 [12.4]
Employment, n [%]
Employed	97 [39.0]
Unemployed	32 [12.9]
Pension	91 [36.5]
Other (sick leave, student, part time, etc.)	29 [11.6]
Living situation, n [%]
Living alone	64 [25.7]
Living with spouse/partner and/or children	185 [74.3]
Participants at sights, n [%]
Surgical ward (Naestved)	49 [19.7]
Medical ward (Vejle)	45 [18.1]
Oncology ward (Herning)	50 [20.1]
Rehabilitation centre (REHPA)	105 [42.1]
Medical condition, n [%] (multiple answers were possible)
Heart disease	11 [4.4]
Cancer	165 [66.3]
Lung disease	3 [1.2]
Other (diabetes, sclerosis, arthritis, etc.)	56 [22.5]
Multiple diseases (two or more of the above)	14 [5.6]
Currently in treatment, n [%]	158 [63.5]
Uses sleep medication, n [%]	34 [13.7]
Insomnia Severity Index scores, n [%]
0–7 = absence of insomnia	90 [36.1]
8–14 = sub-threshold insomnia	90 [36.1]
15–21 = moderate insomnia	63 [25.4]
22–28 = severe insomnia	6 [2.4]
EQ-5D-5 L, n [%]
Mobility
No problem	165 [66.3]
Any problem	84 [33.7]
Self-care
No problem	216 [86.8]
Any problem	33 [13.2]
Usual activities
No problem	93 [37.4]
Any problem	156 [62.6]
Pain/discomfort
No problem	64 [25.7]
Any problem	185 [74.3]
Anxiety/depression
No problem	132 [53.0]
Any problem	117 [47.0]