Two Consecutive Sunscreen Applications Optimize Sun Protection

NCT ID: NCT03033654

Last Updated: 2017-01-27

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 31 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2015-02-28
• Study Completion Date: 2015-02-28

Brief Summary

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.

Conditions

Sun Protection

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Intervention

Two Consecutive Sunscreen Applications

Group Type: EXPERIMENTAL

Sunscreen, Actinica

Intervention Type: OTHER

Two Consecutive Sunscreen Applications

Interventions

Sunscreen, Actinica

Two Consecutive Sunscreen Applications

Intervention Type: OTHER

Eligibility Criteria

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

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Bispebjerg Hospital

OTHER

Sponsor Role: lead

Responsible Party

Ida M. Heerfordt

MD

Responsibility Role: PRINCIPAL_INVESTIGATOR

Other Identifiers

H-1-2014-094

Identifier Type: -

Identifier Source: org_study_id