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Application Patterns Among Participants Randomized to Daily Sunscreen Use in a Skin Cancer Prevention Trial
Rachel Neale, PhD;
Gail Williams, PhD;
Adèle Green, MB BS, PhD
Arch Dermatol. 2002;138:1319-1325.
Background Despite many investigations of sunscreen use, there have been few among
adults in the community at large. Better understanding of sunscreen application
patterns will lead to more strategic skin cancer prevention strategies among
sun-exposed populations.
Objective To explore patterns of sunscreen use, particularly the quantity of sunscreen
used and the application frequency, among participants in a community-based
sunscreen intervention.
Design Follow-up of patterns of sunscreen use over 4.5 years.
Setting Nambour, a subtropical town in Queensland, Australia.
Participants People drawn randomly from the electoral register who were later randomized
as part of a skin cancer prevention trial.
Interventions Daily application of a standard sun protection factor 15+ broad-spectrum
retail sunscreen to the head and neck, arms, and hands.
Outcome Measures Frequency of application of sunscreen, weight of sunscreen applied,
and quantity applied per unit area of skin.
Results Fifty-six percent of participants reported applying sunscreen on at
least 5 days per week, with 27% using sunscreen infrequently on 2 or fewer
days per week. The median daily amount of sunscreen applied averaged over
the duration of the trial was 1.5 g/d (range, 0-7.4 g/d). The median quantity
of sunscreen applied was 0.79 mg/cm2, which was less than half
the amount needed to achieve the labeled sun protection factor.
Conclusions It is possible to implement the daily application of sunscreen in sun-exposed
populations, although protection would be increased if the quantity of sunscreen
applied were greater.
From the Population and Clinical Sciences Division, Queensland Institute
of Medical Research (Drs Neale and Green), and Australian Centre for International
and Tropical Health and Nutrition (School of Public Health), University of
Queensland (Dr Williams), Brisbane, Australia.
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