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. 2014 Mar 18;4(3):e004183. doi: 10.1136/bmjopen-2013-004183

Appendix: The sleep condition indicator

graphic file with name bmjopen2013004183f01.jpg

Scoring instructions:

Add the item scores to obtain the SCI total (minimum 0, maximum 32).

A higher score means better sleep.

Scores can be converted to 0–10 format (minimum 0, maximum 10) by dividing total by 3.2.

Item scores in grey area represent threshold criteria for Insomnia Disorder.