- Title
- Reliability of skin-type self-assessment: agreement of adolescents' repeated Fitzpatrick skin phototype classification ratings during a cohort study
- Creator
- Magin, P.; Pond, D.; Smith, W.; Goode, S.; Paterson, N.
- Relation
- Journal of the European Academy of Dermatology and Venereology Vol. 26, Issue 11, p. 1396-1399
- Publisher Link
- http://dx.doi.org/10.1111/j.1468-3083.2011.04298.x
- Publisher
- Wiley-Blackwell
- Resource Type
- journal article
- Date
- 2012
- Description
- Background: The Fitzpatrick Skin Phototype Classification (FSPC) is the most commonly used measure of skin type. In questionnaire-based surveys, self-rated FSPC is often used as a measure of respondents’ skin type. Objective: The objective of this analysis was to assess test-retest reliability of the self-rated FSPC within a 12-month cohort study that examined the psychological sequelae of acne. Methods: Participants were students aged 14–17 years in four Australian secondary schools; two-government system schools and two private schools. The primary outcomes were a number of psychological measures. The FSPC was assessed by a single concise questionnaire item. Test-retest agreement (as measured by quadratic weighted kappa) of participants’ self-rated FSPC at three time-points (baseline, 6 and 12 months) was calculated. Results: Of the 244 participating students, 209 students (86%) completed all three rounds of data collection. A further 26 students (11%) completed two rounds. Quadratic weighted kappa for Rounds 1 and 2 was 0.757 (95% CI 0.663–0.831). For Rounds 2 and 3 it was 0.805 (95% CI 0.659–0.893). Between Rounds 1 and 3 it was 0.767 (95% CI 0.698–0.832). This represents good-to-very-good agreement. Skin type was retained as an independent variable in 8 of the16 regression models built to explain psychological outcomes in this study. Conclusion: Skin type appears to be a significant factor in psychological morbidity in acne. The FSPC is a reliable method for assessing skin phenotype, even when elicited via a concise questionnaire item suitable for assessing skin type as a potential confounder in studies of other outcome factors.
- Subject
- skin type; Fitzpatrick Skin Phototype Classification; adolescents; acne
- Identifier
- http://hdl.handle.net/1959.13/1317694
- Identifier
- uon:23478
- Identifier
- ISSN:0926-9959
- Language
- eng
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