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    Glossary Internal Consistency

    measures how well items on a test assess the same concept

    Internal consistency refers to the reliability of a test or measurement tool, indicating how well the items within the tool measure the same construct or concept. For example, in a survey measuring stress levels, internal consistency would mean that all the questions consistently reflect the respondent's stress. This is often assessed using statistical methods like Cronbach's alpha, which quantifies the degree to which items correlate with each other.

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    1. Questionnaire Modifications and Alternative Scoring Methods of the Dermatology Life Quality Index: A Systematic Review Value in Health · 2021 · 13 citations
    2. Validity And Reliability of The Thai Version of The Family Dermatology Life Quality Index Siriraj Medical Journal · 2023
    3. Characteristics of the structural components of pilosebaceous follicles in the differential diagnosis of non-cicatricial alopecia Russian Journal of Skin and Venereal Diseases · 2025
    4. Ultra-Performance Liquid Chromatography with Electrospray Ionization Tandem Mass Spectrometry for the Determination of Ketoconazole in Anti-Dandruff Shampoo Analytical Letters · 2014 · 1 citations
    5. Re-Examining the Psychometric Properties of the Massachusetts General Hospital Hairpulling Scale NDSU Repository (North Dakota State University) · 2014
    6. Development and validation of PICAT - PRP injectable competency assessment tool for androgenic alopecia for dermatology residents eCommons - AKU (Aga Khan University) · 2024
    7. Development of a health-related quality of life questionnaire for women with androgenetic alopecia Clinical and Experimental Dermatology · 2000 · 31 citations
    8. Alopecia areata – Quality of Life Questionnaire – formation and validation of the Polish version Advances in Dermatology and Allergology · 2025
    9. The Hairdex Quality of Life Instrument—A Translation and Psychometric Validation in Patients with Alopecia Areata Skin Health and Disease · 2023 · 5 citations
    10. Structural analysis of human hair single fibres by scanning microbeam SAXS Journal of Structural Biology · 2006 · 65 citations
    11. Do 5α-Reductase Inhibitors Raise Circulating Serum Testosterone Levels? A Comprehensive Review and Meta-Analysis to Explaining Paradoxical Results Sexual Medicine Reviews · 2018 · 5 citations
    12. The structure of people’s hair PeerJ · 2014 · 107 citations
    13. A Systematic Review of 207 Studies Describing Validation Aspects of the Dermatology Life Quality Index Acta Dermato Venereologica · 2024 · 8 citations
    14. Translation into Portuguese language (Brazil), transcultural adaptation and validation of the quality of life questionnaire in female pattern hair loss (WAA-QoL-BP) Anais Brasileiros De Dermatologia · 2018 · 8 citations
    15. Dysmorphic Concern Questionnaire: Greek Translation, Validation and Psychometric Properties Open Journal of Psychiatry · 2020 · 6 citations
    16. Alopecia Areata–Specific Patient-Reported Outcome Measures JAMA Dermatology · 2025 · 2 citations
    17. Reliability and validity of the Turkish Alopecia Areata Quality of Life Index TURKDERM · 2026
    18. InCISE: Instrument for Comprehensive Incisional and Surgical Evaluation The Laryngoscope · 2022
    19. The Multidimensional Assessment of Interoceptive Awareness-2 Scale: A Turkish Validity and Reliability Study in Patients Admitted to the Dermatology Outpatient Clinic Turkiye Klinikleri Journal of Dermatology · 2022
    20. Rapid and Sensitive LC–MS–MS Method for the Simultaneous Estimation of Alfuzosin and Dutasteride in Human Plasma Chromatographia · 2008 · 25 citations
    21. The effect of a single epilation on successive hair eruptions in normal and hormone‐treated rats Journal of Experimental Zoology · 1979 · 20 citations
    22. Development and Validation of a Quality of Life Measurement for Chronic Skin Disorders in French: VQ-Dermato Dermatology · 1999 · 45 citations
    23. The Polycystic Ovary Syndrome Health-Related Quality-of-Life Questionnaire: Confirmatory Factor Analysis International Journal of Endocrinology and Metabolism · 2018 · 19 citations
    24. Development of Chinese Version of Polycystic Ovary Syndrome Health-Related Quality of Life Questionnaire (Chi-PCOSQ) PLOS ONE · 2015 · 15 citations
    25. Beyond health-related quality of life: initial psychometric validation of a new scale for addressing the gap in assessing the full range of alopecia areata psychosocial burden British Journal of Dermatology · 2023 · 8 citations
    26. Lichen Planus Activity and Damage Index (LiPADI)–Creation of the Questionnaire Journal of Clinical Medicine · 2021 · 6 citations
    27. Development and validation of a patient‐reported outcome measure for hair loss treatment: The HAIR‐Q Journal of Cosmetic Dermatology · 2024 · 2 citations
    28. Development of the First Health-Related Quality of Life Questionnaires in Arabic for Women with Polycystic Ovary Syndrome (Part I): The Creation and Reliability Analysis of PCOSQoL-47 and PCOSQoL-42 Questionnaires Cureus · 2021 · 2 citations
    29. Development of the AAcQLI : A New Instrument for Assessing Quality of Life in Children With Alopecia Areata International Journal of Dermatology · 2025 · 1 citations
    30. Genital Dermatology Australasian Journal of Dermatology · 2017