The Pittsburgh Sleep Quality Index (PSQI).
Effects of Aromatherapy on the Anxiety, Vital Signs, and Sleep Quality of Percutaneous Coronary Intervention Patients in Intensive Care Units
Test-retest reliability and validity of the Pittsburgh Sleep Quality Index in primary insomnia.
The Pittsburgh sleep quality index: A new instrument for psychiatric practice and research
Effects of aromatherapy on sleep quality and anxiety of patients.
The Pittsburgh Sleep Quality Index: Validity and factor structure in young people.