Demographical, Clinical, and Psychological Characteristics of Users and Nonusers of an Online Platform for T2DM Patients (e-VitaDM-3/ZODIAC-44)

Table 2

Cronbach’s alpha for multi-item scales.

Multi-item scale	α
Europep
Total	0.963
Subscale general practice	0.966
Subscale general practitioner	0.840
EQ-5D	0.652
WHO-5	0.872
PAID-5	0.867
SDSCA
Total	0.517
Subscale general diet	0.875
Subscale specific diet	0^1
Subscale total diet	0.446^2
Subscale exercise	0.663
Subscale blood-glucose testing	0.912
Subscale foot-care	0.593

Because of the negative intercorrelation between the two items Cronbach’s alpha is reported to be 0.
²The alpha for the subscale total diet is lower than that for the subscale general diet due to the low reliability of the subscale specific diet.