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McGill Quality of Life Questionnaire (MQOL)

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Supplemental: Amyotrophic Lateral Sclerosis (ALS)
Short Description of Instrument
The McGill Quality of Life Questionnaire (MQOL) is a patient-reported instrument that employs 16 items plus a single-item global scale, each with a 2- day time frame. Five domains (physical well-being, physical symptoms, psychological, existential, and support) were identified through principal component analysis, and each of the domains is scored as a separate sub-scale.
The MQOL was designed to measure quality of life of people at all stages of a life-threatening illness, from diagnosis to cure or death.

An overall index score can be calculated from the means of the five sub-scales. The single-item global quality of life scale is included as a validity variable but also can be used in conjunction with the overall MQOL and sub-scale scores.

Cohen SR, Mount BM, Strobel MG, Bui F. The McGill Quality of Life Questionnaire: a measure of quality of life appropriate for people with advanced
disease. A preliminary study of validity and acceptability. Palliat Med. 1995;9(3):207-219.
Cohen SR, Mount BM, Bruera E, Provost M, Rowe J, Tong K. Validity of the McGill Quality of Life Questionnaire in the palliative care setting: a multi-centre Canadian study demonstrating the importance of the existential domain. Palliat Med. 1997;11(1):3-20.


Document last updated July 2018