Table 3.

Internal consistency of the subscales

Subscale	Dutch MCLHB-DRR scale; N = 618				English MCLHB-DRR scale; N = 617
	No. of items	Range of scores	Mean ± SD	α	No. of items	Range of scores	Mean ± SD	α
Perceived susceptibility	4	4–18	10.1 ± 2.7	0.86b	4	4–19	NK	0.86
Perceived severity	5	5–25	13.9 ± 3.7	0.76	5	5–25	NK	0.73
Perceived benefits	3a	3–15	9.1 ± 2.3	0.76c	4	4–20	NK	0.69
Perceived barriers	4	4–15	8.0 ± 2.5	0.77	4	4–20	NK	0.74
Cues to action	4	4–19	10.2 ± 3.1	0.84	4	4–20	NK	0.68
General health motivation	4	4–20	14.5 ± 2.3	0.64d	4	4–20	NK	0.61
Self-efficacy	2	2–10	5.8 ± 1.7	0.81	2	2–10	NK	0.66

^aItem 10 is deleted

^bCronbach’s alpha elevated to 0.93 if item 4 was deleted

^cCronbach’s alpha elevated to 0.80 if item 13 was deleted

^dCronbach’s alpha elevated to 0.69 if item 25 was deleted

Abbreviations: α Cronbach’s alpha, MCLHB-DRR Motivation to Change Lifestyle and Health Behaviours for Dementia Risk Reduction, NK Not known