Table 2.

Subjective Assessment Measures for Insomnia

Measure	Purpose	Number of items	Score Interpretation & Psychometrics	Additional Information
Consensus Sleep Diary33	To gather information about sleep patterns: sleep onset latency, wakefulness after initial sleep onset, total sleep time, total time spent in bed, sleep efficiency, and sleep quality or satisfaction	Eight core questions with space for open-ended comments from the respondent	Still needs to be tested, refined, and validated	Two optional versions exist with seven additional questions: 1. completed entirely in the morning and 2. completed in the morning and before bed Available in the original publication33
Insomnia Severity Index34,35	Assess the severity and impact of insomnia	7 items self-rated on 5 point Likert scale Scale scores range from 0 = no difficulty to 4 = very difficult	Total scores can be categorized into 0–7 = no clinically significant insomnia, 8–14 = subthreshold insomnia, 15–21 = moderate clinical insomnia, and 22–28 = severe clinical insomnia Scores of ≥ 10 have a sensitivity of 86.1% and specificity of 87.7% for detecting insomnia cases Internal consistency: Cronbach α = 0.90	Available in English, Spanish, French, and Arabic Time to complete: 5 minutes Use with permission: Charles M. Morin, PhD cmorin@psy.ulaval.ca