Psychology RootsDermatology Life Quality Index
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About Dermatology Life Quality Index
Scale Name
Dermatology Life Quality Index
Author Details
A.Y. Finlay & G.K. Khan
Translation Availability
Not Sure
Background/Description
The Dermatology Life Quality Index (DLQI), developed by Finlay and Khan in 1994, is a widely used tool to measure the impact of skin conditions on a patient’s quality of life. This scale was designed for use in both clinical settings and research studies to assess the psychosocial impact of dermatological disorders, ranging from acne and eczema to psoriasis and skin cancers.
The DLQI is a self-reported questionnaire that provides an indication of how skin diseases affect various aspects of daily life, including physical symptoms, emotional well-being, social functioning, and personal relationships. As skin conditions often carry a social stigma, the DLQI was developed to capture these broader implications that go beyond mere physical symptoms.
The scale is commonly employed in dermatological clinics and by healthcare professionals as part of routine assessments to guide treatment plans, evaluate therapeutic interventions, and monitor changes in patients’ quality of life over time.
Administration, Scoring and Interpretation
- Target Population: The DLQI is intended for patients aged 16 and above who are experiencing any form of dermatological condition.
- Format: The DLQI consists of 10 questions covering six domains:
- Symptoms and feelings
- Daily activities
- Leisure
- Work and school
- Personal relationships
- Treatment effects
- Rating Scale: Each question is scored on a 4-point scale, where:
- 0 = Not at all
- 1 = A little
- 2 = A lot
- 3 = Very much
- Administration Context: The DLQI can be self-administered or administered by a healthcare provider in both outpatient and inpatient settings. It is typically used as part of the routine clinical assessment of patients with skin disorders to track changes in quality of life over time.
- Scoring: The total DLQI score is the sum of the scores for all 10 items, ranging from 0 to 30. Higher scores indicate a greater impairment in quality of life. Scores are categorized as follows:
- 0–1 = No effect on quality of life
- 2–5 = Small effect on quality of life
- 6–10 = Moderate effect on quality of life
- 11–20 = Very large effect on quality of life
- 21–30 = Extremely large effect on quality of life
Reliability and Validity
The DLQI has been validated in numerous studies and has shown excellent reliability and validity across different populations. The internal consistency of the scale, with a Cronbach’s alpha value typically exceeding 0.80, indicates that the DLQI is a highly reliable measure. The test-retest reliability has also been demonstrated to be robust.
The DLQI has been translated into over 90 languages and is considered one of the most globally accepted tools for assessing quality of life in dermatology. Its validity is supported by significant correlations with clinical measures of disease severity and other health-related quality-of-life scales.
Available Versions
10-Items
Reference
Finlay, A. Y., & Khan, G. (1994). Dermatology Life Quality Index (DLQI)—a simple practical measure for routine clinical use. Clinical and experimental dermatology, 19(3), 210-216.
Important Link
Scale File:
Frequently Asked Questions
Q: What does the Dermatology Life Quality Index (DLQI) measure?
A: The DLQI measures the impact of skin conditions on various aspects of a patient’s quality of life, including physical, emotional, and social functioning.
Q: Who can use the DLQI?
A: The DLQI is used with patients aged 16 and older who have dermatological conditions. It is commonly used in both clinical and research settings.
Q: How is the DLQI scored?
A: The DLQI is scored by summing the responses to the 10 items, with higher scores indicating a greater negative impact on quality of life. The total score can range from 0 to 30.
Q: Is the DLQI reliable and valid?
A: Yes, the DLQI has been extensively validated and shows high reliability across various populations and languages.
Q: Can the DLQI be used to track changes in quality of life over time?
A: Yes, the DLQI is often administered multiple times to track the progression of a skin condition and the effectiveness of treatment.
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