Two Consecutive Sunscreen Applications Optimize Sun Protection

January 26, 2017 updated by: Ida M. Heerfordt, Bispebjerg Hospital
The investigators aim to investigate how much two consecutive applications of sunscreen before sun exposure can increase the quantities of sunscreen applied and decrease the skin area left without sunscreen compared to a single application. Volunteers wearing swimwear applied sunscreen in a laboratory environment twice and had pictures taken in black light before and after. As sunscreens absorb black light the darkness of the skin increased with increasing amounts of sunscreen applied. The investigators conducted a standard curve establishing a link between picture darkness and applied sunscreen quantity. Participants were asked to apply sunscreen the way they would normally do but two consecutive times. No other advice was given. The level of protection was determined by picture analysis as measurements of darkness of selected skin sites as well as the percentages of skin area left without sunscreen in different body regions and in total.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

31

Phase

  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Healthy Caucasians between older than 18

Exclusion Criteria:

  • Suffering from a skin disease, were allergic to the content in sunscreen, were pregnant or breastfeeding

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Intervention
Two Consecutive Sunscreen Applications
Other: Sunscreen, Actinica
Two Consecutive Sunscreen Applications

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Sun protection
Time Frame: The day of intervention. Sun protection will be assessed right after sunscreen application.
Sun protection will be determined as sunscreen quantities applied in mg/cm^2 and areas of covered skin in percentage.
The day of intervention. Sun protection will be assessed right after sunscreen application.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Bispebjerg Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 1, 2015

Primary Completion (Actual)

February 1, 2015

Study Completion (Actual)

February 1, 2015

Study Registration Dates

First Submitted

January 20, 2017

First Submitted That Met QC Criteria

January 26, 2017

First Posted (Estimate)

January 27, 2017

Study Record Updates

Last Update Posted (Estimate)

January 27, 2017

Last Update Submitted That Met QC Criteria

January 26, 2017

Last Verified

January 1, 2017

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • H-1-2014-094

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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