Diet Interventions in Psoriatic Arthritis

University of Pennsylvania90 enrolled

Overview

The purpose of this study is to learn whether changing diet impacts psoriatic arthritis (PsA).

The study asks if dietary change and nutritional support improves disease activity and if patients are better able to improve or sustain progress with additional incentives. The study will use an online program to communicate with participants through text and online surveys. This 24-week trial will enroll 90 patients in the US and Canada with New York University as a back-up site.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Psoriatic Arthritis

Interventions

Diet 1OTHER

Diet 1 will focus on which foods are eaten and the impact on disease outcomes.

Diet 2OTHER

This diet will limit the amount of food energy consumed each day and the impact on disease outcomes. This will be determined by factors including the subject's demographics (age, sex, weight, height).

Eligibility

Sex: ALLMin age: 18 YearsMax age: 80 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Age 18-80 * Required Rheumatologist-confirmed diagnosis of PsA fulfilling Classification of Psoriatic Arthritis Criteria (CASPAR) * Willing to alter diet and participate for 24 weeks * Able to attend follow-up visits * Body mass index (BMI) \> 25 and \<40 * No history of eating disorders such as anorexia or bulimia * Disease Activity in Psoriatic Arthritis Assessment (DAPSA) \> 10 * Stable treatment for PsA for ≥3 months prior to enrollment (patients may be on any disease modifying anti-rheumatic drugs (DMARDs) or they can be free of systemic medications * Owns and uses an iPhone or Android smart phone, or is willing to use a device provided by the study team Exclusion Criteria: * Inability to provide informed consent * Plan to change systemic treatment for psoriasis or PsA in the next 4-8 weeks * Use of systemic corticosteroids * All persons who would be placed at an increased risk including any medical condition that will impair the ability of the person to participate in a nutritional intervention study (e.g. insulin dependent diabetes, use of coumadin, advanced malignancy, inflammatory bowel disease, dementia) * History of food allergy to any of the components of olive oil or nuts * Inability to read and write in English * Unwillingness to change dietary habits * Known pregnancy (pregnancy testing will be performed for women of childbearing age; weight changes will not accurately reflect the changes we would anticipate in pregnant patients and weight loss may be detrimental to maternal and/or fetal outcomes). * Participation in another physical activity study and/or diet trial

Locations (2)

University of Pennsylvania

Philadelphia, Pennsylvania, United States

Women's College Hospital, University of Toronto

Toronto, Ontario, Canada

Outcomes

Primary Outcomes

Change in Disease Activity in Psoriatic Arthritis (DAPSA)

Disease Activity(DAPSA): 0-4 Remission; 5-14 Low; 15-28 Moderate; \> (Greater than) 28 High Disease Activity, DAPSA = TJ (Tender Joints) + SJ (Swollen Joints) + CRP (C-reactive protein) + Activity + Pain 1. Tender Joints Count (0-68), TJ: 2. Swollen Joints Count (0-66), SJ: 3. CRP (mg/dl): 4. Patient's assessment of disease activity and pain: How active was your rheumatic disease on average during the last week? Scale of 1-10 (Not Active -Active) How would you describe the overall level of joint pain during the last week? Scale of 1-10 (None-Very Severe)

Time frame: 12 weeks

Secondary Outcomes

Change in Psoriasis Area and Severity Index (PASI)

A measurement of the severity of psoriasis; 0 (no disease) to 72 (maximal disease)

Time frame: 24 weeks

Change in Disease Activity in Psoriatic Arthritis (DAPSA)

Disease Activity(DAPSA): 0-4 Remission; 5-14 Low; 15-28 Moderate; \> (Greater than) 28 High Disease Activity DAPSA = TJ + SJ + CRP + Activity + Pain 1. Tender Joints Count (0-68), TJ: 2. Swollen Joints Count (0-66), SJ: 3. CRP (mg/dl): 4. Patient's assessment of disease activity and pain: How active was your rheumatic disease on average during the last week? Scale of 1-10 (Not Active -Active) How would you describe the overall level of joint pain during the last week? Scale of 1-10 (None-Very Severe)

Time frame: 24 weeks

Patient Reported Outcomes-Physical Function

-Physical Function-International Physical Activity Questionnaire (IPAQ) We will examine change in physical activity over the study (as we will be advising patients not to change exercise habits). IPAQ is an instrument for assessing levels and patterns of physical activity. IPAQ has been validated in healthy adults and is publicly available, open access, and no permissions are required for use.

Time frame: Varying times: (at Baseline) 0,12, 24 Weeks

Data from ClinicalTrials.gov

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Patient Reported Outcomes-Psoriatic Arthritis Disease Impact

-Psoriatic Arthritis Disease Impact- Psoriatic Arthritis Impact of Disease (PSAID). The PsAID is a measure developed by the European League Against Rheumatism (EULAR) and is composed of domains selected by an international group of patients with psoriatic arthritis. The questionnaire uses a weighted scoring system (weights were derived by patient impression of importance) and has a range of 0-10 with 4 being considered a patient acceptable symptom state. The proposed Minimal Clinically Important Difference (MCID) is 3.

Time frame: Varying times: (at Baseline) 0, 4, 8, 12, 16, 20, 24 Weeks

Patient Reported Outcomes-Skin Disease Impact

-Skin Disease Impact- Psoriasis Area and Severity Index (PASI). The Psoriasis Area Severity Index (PASI) is an index used to express the severity of psoriasis. It combines the severity (erythema (redness), induration (thickness) and desquamation (peeling) and percentage of affected area. This is the primary outcome measure in trials of psoriatic arthritis.

Time frame: Varying times: (at Baseline) 0,12, 24 Weeks

Patient Reported Outcomes-Fatigue

-Fatigue- PROMIS (Patient-Reported Outcomes Measurement Information System) Fatigue (CAT) The PROMIS Fatigue scale assesses fatigue experience and impact of fatigue over 7 days. The instrument includes items on exhaustion and ability to function normally in physical, social, mental and family roles and activities. This instrument has good content validity and responsiveness in rheumatoid arthritis, a similar inflammatory arthritis. We will use the CAT (Computerized Adaptive Test) response instrument.

Time frame: Varying times: (at Baseline) 0, 4, 8, 12, 16, 20, 24 Weeks

Patient Reported Outcomes-Depression

-Depression- PROMIS (Patient-Reported Outcomes Measurement Information System) Depression (CAT) The PROMIS Depression assesses sadness, guilt, self-criticism, worthlessness, loneliness, loss of interest, meaning, and purpose. The PROMIS depression scale is used across diseases but has been specifically demonstrated to have good responsiveness with therapy in patients with rheumatoid arthritis. The item bank assesses symptoms over the past 7 days. (Suicidality is not assessed in this questionnaire). We will use the CAT (Computerized Adaptive Test) response instrument.

Time frame: Varying times: (at Baseline) 0,12, 24 Weeks

Metabolic Profile-Blood Pressure

Change in Blood Pressure Blood Pressure; BP \_ systolic/diastolic; Both pressures will be assessed during the study period.