Summary score for the Insomnia Severity Index. Morin CM, Insomnia, psychological assessment and management. Guilford Press, New York, 1993 Each item is scored from 0 to 4. Total score is the sum of all seven items (0 to 28), and catergorized as: absence of insomnia (0 to 7), sub-threshold insomnia (8 to 14), moderate insomnia (15 to 21), and severe insomnia (22 to 28).
This is a numeric variable with values ranging from 0-28 based on the Sleep Questionnaire II form. Missing if did not answer any of following: SQEA6, SQEA7, SQEA8, SQEA9. If SQEA10 answered 'Yes 1', but any of following missing: SQEA11, SQEA12, SQEA13, then missing. Missing if did not answer SQEA10 and SQEA11-SQEA13.
Search for all ISI variables within this dataset