https://www.nimh.nih.gov/research/research-funded-by-nimh/rdoc/units/self-reports/153845
Insomnia Severity Index - National Institute of Mental Health (NIMH)
institute of mental healthinsomnia severity indexnationalnimh
https://pubmed.ncbi.nlm.nih.gov/21532953/
The Insomnia Severity Index: psychometric indicators to detect insomnia cases and evaluate...
These findings provide further evidence that the ISI is a reliable and valid instrument to detect cases of insomnia in the population and is sensitive to...
insomnia severity indexpsychometric