Impact on UVB Narrow Band and UVA1 Therapy on Serum 25-hydroxyvitamin D Levels

NCT ID: NCT00910260

Last Updated: 2014-05-20

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 116 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2009-03-31
• Study Completion Date: 2011-02-28

Brief Summary

We plan to investigate the serum elevation of 25(OH)D under UVB nb and UVA1 therapy, in order to determine the effect of these nowadays frequently used wavelengths for phototherapy on vitamin D plasma levels. We hope for a better understanding of steady-state and treatment-induced levels of vitamin D changes to better recognize the impact of phototherapy on vitamin D synthesis in the skin, the dimension of vitamin D production to be expected in the course of standard phototherapy and a potential gap in vitamin D production compared to physiological needs which then should be supplemented orally.

Detailed Description

This is an open observational study in dermatological patients undergoing phototherapy.

In patients with a skin disease and the routinely given indication for a phototherapy with UVB narrow-band (UVB nb, 311nm) or UVA1 (340-400 nm), the serum 25-hydroxyvitamin D, calcium, parathormone, phosphate and albumin levels will be measured before, during and after completion of the 12-week therapy (30 patients per group). Patients will be recruited in the department of dermatology of the University Hospital Zürich in the outpatient clinic. Following oral and written consent, serum 25-hydroxyvitamin D, calcium, parathormone, phosphate and albumin levels will be measured before the therapy, one week after start as well as after completion of the UVB nb/UVA1 therapy.

In parallel to the study the patients will be asked to fill in a questionnaire evaluating the daily vitamin D consume (milk and milk products, fish, food enhanced in vitamin D, multivitamin supplements), sun exposure per week during previous weeks, degree of tanning, the use of sunscreen, the DLQI and Skindex-29.

A physical examination including clinical score where available will be performed at every "checkpoint". During the first physical examination the Fitzpatrick-skin type of patient will be recorded.

The following participant characteristics will be recorded: age, weight, body mass index (BMI), phototype, skin disease, comorbidities, usual medication, and period of the year where UVB nb/UVA1 therapy is performed (summer vs. winter), cumulative UVB nb/UVA1 doses.

Conditions

Skin Disease

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Interventions

Blood analysis

Serum 25-hydroxyvitamin D, calcium, parathormone, phosphate, C-reactive protein and albumin levels will be measured at every visit: day 0, day 7 and day 84.

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

1. Dermatological indication for a phototherapy with UVB nb or UVA1

2. Oral and written informed patient consent

Exclusion Criteria

1. Interruption of the light therapy for more than 14 days

2. Withdrawal of consent to participate

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

University of Zurich

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

01 Studienregister MasterAdmins

Role: STUDY_DIRECTOR

UniversitaetsSpital Zuerich

Locations

Dermatology Department, University Hospital

Zurich, , Switzerland

Countries

Switzerland

Other Identifiers

0000

Identifier Type: -

Identifier Source: org_study_id