Effects of long term application of sunscreen to actinic keratosis; prospective case control study

Effects of long term application of sunscreen to actinic keratosis; prospective case control study - Effects of long term application of sunscreen to actinic keratosis: prospective case control study

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000004564

Enrollment

Registered

2010-11-21

Start date

2010-11-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

actinic keratosis

Interventions

application of sunscreen (SPF30, PA+++) for 3 years

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: existence of actinic keratosis on the face, ears, hands and forearms

Exclusion criteria

Exclusion criteria: squamous cell carcinoma, basal cell carcinoma, severe actinic keratosis(AK3)

Design outcomes

Primary

Measure	Time frame
the number of actinic keratosis	—

Secondary

Measure	Time frame
the number of solar lentigo, wrinkle the histological change of actinic keratosis	—

Countries

Japan

Contacts

Public ContactKayo Kunimoto

Wakayama Medical University dermatology

k-jigen@wakayama-med.ac.jp073-447-2300

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026