Brief Description

The QLI-70 is a self-report questionnaire developed to assess quality of life in various populations. It consists of 70 questions covering physical, psychological, social, and environmental dimensions of life.

Purpose

The overall evaluation of an individual’s quality of life. The assessment of the impact of illnesses, treatments, or social factors on daily life. Its use in research or clinical settings for comparisons between population groups.

Scoring Method

Each question is answered on a Likert scale (e.g., from 1 = “not at all satisfied” to 5 = “completely satisfied”). Subscales are calculated (physical health, psychological well-being, social relationships, environment) as well as a total quality of life index. Higher scores correspond to better quality of life.

Validity

Studies have confirmed content, construct, and criterion validity. The tool has been translated and adapted into various languages, including cultural adaptations.

Reliability

Internal consistency is high (Cronbach’s α > 0.80 for most subscales). Test-retest reliability has been found satisfactory across different populations.

Data Analysis and Use

The instrument can be used in clinical studies to evaluate therapeutic interventions. It is useful in epidemiological research for comparative analysis between groups. Data can be analyzed using descriptive statistics, factor analysis, and comparative methods such as ANOVA and t-tests.

References

Ferrans, C. E., & Powers, M. J. (1992). Psychometric assessment of the Quality of Life Index. Research in Nursing & Health, 15(1), 29–38.
Ferrans, C. E. (1996). Development of a conceptual model of quality of life. Scholarly Inquiry for Nursing Practice, 10(3), 293–304.
Skevington, S. M., Lotfy, M., & O’Connell, K. A. (2004). The World Health Organization’s WHOQOL-BREF quality of life assessment: Psychometric properties and results of the international field trial. Quality of Life Research, 13, 299–310.