Driving Time and Facial Skin Hydration Asymmetry in Florida Drivers (DCHA-FL-25-65)
Driving Time and Left-Cheek Skin Hydration Asymmetry in Florida Residents: An Observational Study on Cumulative UVA Exposure Through Vehicle Side Windows
his observational study examines whether time spent driving is associated with differences in skin hydration between the left and right cheeks in female drivers residing in Florida. In left-hand-drive vehicles, the driver's left cheek is chronically exposed to ultraviolet A (UVA) radiation through the unshaded side window during every daytime driving episode. A prior study by IAS Skin Care (NCT07564869, n=30) found that the left cheek was less hydrated than the right cheek in 60% of participants, suggesting a possible effect of driving-related UVA exposure on facial skin hydration asymmetry.
Eighty female drivers aged 25-65 years residing in Florida will be enrolled. At a single visit, skin hydration will be measured at three facial zones (left cheek, right cheek, and forehead as a symmetrical control zone) using the BT-Analyze bioimpedance device. Participants will complete a structured questionnaire on driving habits, sun protection practices, and skin history. The primary outcome is the Hydration Asymmetry Index (HAI = right cheek minus left cheek BT-Analyze score). Associations between driving time, cumulative driving exposure, window tinting, sunscreen use, and HAI will be examined using Spearman correlation, Mann-Whitney U tests, and multiple linear regression.
연구 개요
연구 유형
등록 (추정된)
연락처 및 위치
연구 연락처
- 이름: Olga IAS, M.Sc
- 전화번호: 689-249-26-77
- 이메일: ias.skincare1@gmail.com
연구 장소
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Florida
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Orlando, Florida, 미국, 32835
- IAS Skin Care
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연락하다:
- Olga IAS, M.Sc
- 전화번호: 689-249-2677
- 이메일: ias.skincare1@gmail.com
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참여기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
샘플링 방법
연구 인구
설명
Inclusion Criteria:
- Female sex, aged 25 to 65 years (inclusive)
- Valid driver's license and active driving for a minimum of 3 years
- Driving frequency of at least 3 days per week on average
- Florida residency for a minimum of 2 years prior to enrollment
- Ability to provide written informed consent in English or Russian
Exclusion Criteria:
- Window tinting on the driver-side window of the participant's primary vehicle
- Regular sunscreen application specifically to the left side of the face before driving (more than half of driving occasions in the past month)
- Active skin disease on the face at time of assessment
- Injectable cosmetic procedures (Botox or fillers) in the past 6 months
- Laser resurfacing or chemical peel in the past 3 months
- Inability to refrain from facial cosmetics for at least 2 hours prior to the visit
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
코호트 및 개입
그룹/코호트 |
개입 / 치료 |
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Female Florida Drivers
Female drivers aged 25-65 years residing in Florida for at least two years, driving at least 3 days per week, without window tinting on the driver-side window.
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Non-invasive skin hydration measurement at three facial zones (right cheek, left cheek, forehead) using the BT-Analyze bioimpedance device.
Three measurements per zone.
Single visit.
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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Hydration Asymmetry Index (HAI)
기간: Single visit (Day 1)
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Difference in mean BT-Analyze bioimpedance scores between the right and left cheeks (HAI = right cheek mean minus left cheek mean).
A positive value indicates lower hydration on the left cheek relative to the right.
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Single visit (Day 1)
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2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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Correlation between cumulative driving exposure and HAI
기간: Single visit (Day 1)
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Spearman correlation between cumulative driving exposure index (years of driving × hours per week) and the Hydration Asymmetry Index.
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Single visit (Day 1)
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HAI by window tinting status
기간: Single visit (Day 1)
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Comparison of Hydration Asymmetry Index between participants with tinted versus untinted driver-side windows, assessed by Mann-Whitney U test.
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Single visit (Day 1)
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HAI by sunscreen application habit
기간: Single visit (Day 1)
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Comparison of Hydration Asymmetry Index between participants who regularly apply sunscreen to the left side of the face before driving and those who do not, assessed by Mann-Whitney U test.
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Single visit (Day 1)
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Forehead hydration as symmetry reference
기간: Single visit (Day 1)
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Forehead BT-Analyze score used as a bilateral symmetry reference zone to confirm that observed cheek asymmetry is directional and not attributable to general hydration differences.
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Single visit (Day 1)
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공동 작업자 및 조사자
스폰서
연구 기록 날짜
연구 주요 날짜
연구 시작 (추정된)
기본 완료 (추정된)
연구 완료 (추정된)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- IAS-SKIN-2026-002
개별 참가자 데이터(IPD) 계획
개별 참가자 데이터(IPD)를 공유할 계획입니까?
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
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