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Lifetime prevalence and associated factors of itch with skin conditions: Atopic dermatitis, psoriasis and dry skin in individuals aged over 50.
Clinical and Experimental Dermatology 2024 March 20
BACKGROUND: Itch, common in dermatological conditions, is often accompanied by psychological distress and reduced quality of life. However, research on the prevalence and associated factors of itch with skin conditions in general populations is limited.
OBJECTIVES: This cross-sectional study aimed to determine the lifetime prevalence of itch with skin conditions and identify its associated factors in middle-aged and elderly individuals.
METHODS: Participants from the Rotterdam Study, a population-based cohort, were interviewed to assess whether they had ever had an itchy skin condition, defining lifetime itch with skin conditions. Over 20 demographic, lifestyle, dermatological, and non-dermatological factors were collected. Multivariable logistic regression analysis explored associations between these factors and itch with skin conditions, reported as odds ratios (ORs) with 95% confidence intervals (CIs).
RESULTS: 5,246 eligible participants (age range: 51-100, median age: 67, female: 56.0%) revealed a lifetime prevalence of 33.7% for itch with skin conditions. Female sex (OR (95% CI): 1.26 (1.11-1.43)), body mass index (1.02 (1.01-1.03)), self-reported and presence of atopic dermatitis (4.29 (3.74-4.92), and 1.97 (1.60-2.43)), self-reported and presence of psoriasis (2.31 (1.77-3.01), and 2.11 (1.55-2.87)), self-reported dry skin (1.95 (1.73-2.29)), self-reported asthma (1.40 (1.08-1.83)), renal impairment (1.45 (1.17-1.79)), and clinically relevant depressive and anxiety symptoms (1.85 (1.52-2.25), and 1.36 (1.11-1.66)) were significantly associated with it.
CONCLUSIONS: This study reveals a substantial one-third lifetime prevalence of itch with skin conditions in individuals aged over 50. Significant associations with diverse lifestyle, demographic, dermatological and, intriguingly, non-dermatological factors including renal impairment, imply additional contributors to itch induction or persistence in individuals with skin conditions.
OBJECTIVES: This cross-sectional study aimed to determine the lifetime prevalence of itch with skin conditions and identify its associated factors in middle-aged and elderly individuals.
METHODS: Participants from the Rotterdam Study, a population-based cohort, were interviewed to assess whether they had ever had an itchy skin condition, defining lifetime itch with skin conditions. Over 20 demographic, lifestyle, dermatological, and non-dermatological factors were collected. Multivariable logistic regression analysis explored associations between these factors and itch with skin conditions, reported as odds ratios (ORs) with 95% confidence intervals (CIs).
RESULTS: 5,246 eligible participants (age range: 51-100, median age: 67, female: 56.0%) revealed a lifetime prevalence of 33.7% for itch with skin conditions. Female sex (OR (95% CI): 1.26 (1.11-1.43)), body mass index (1.02 (1.01-1.03)), self-reported and presence of atopic dermatitis (4.29 (3.74-4.92), and 1.97 (1.60-2.43)), self-reported and presence of psoriasis (2.31 (1.77-3.01), and 2.11 (1.55-2.87)), self-reported dry skin (1.95 (1.73-2.29)), self-reported asthma (1.40 (1.08-1.83)), renal impairment (1.45 (1.17-1.79)), and clinically relevant depressive and anxiety symptoms (1.85 (1.52-2.25), and 1.36 (1.11-1.66)) were significantly associated with it.
CONCLUSIONS: This study reveals a substantial one-third lifetime prevalence of itch with skin conditions in individuals aged over 50. Significant associations with diverse lifestyle, demographic, dermatological and, intriguingly, non-dermatological factors including renal impairment, imply additional contributors to itch induction or persistence in individuals with skin conditions.
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