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Published in: Arthritis Research & Therapy 1/2021

01-12-2021 | Vulgar Psoriasis | Research article

Mediterranean diet in axial spondyloarthritis: an observational study in an Italian monocentric cohort

Authors: Francesca Ometto, Augusta Ortolan, Davide Farber, Mariagrazia Lorenzin, Giulia Dellamaria, Giacomo Cozzi, Marta Favero, Romina Valentini, Andrea Doria, Roberta Ramonda

Published in: Arthritis Research & Therapy | Issue 1/2021

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Abstract

Background

Little evidence is available about the impact of diet on disease activity of axial spondyloarthritis (axSpA). This study evaluated the impact of a 6-month nutritional advice based on the Mediterranean diet on the disease activity of axSpA.

Methods

We prospectively collected the information of a group of axSpA patients who were offered nutritional advice for a 6-month period, who were compared to axSpA patients followed at the same center who were not on a specific diet. A nutritionist gave suggestions for dietary modification at baseline and thereafter every 2 months until month 6. Adherence to the Mediterranean diet was evaluated with the PREDIMED questionnaire ranging from 0 (no adherence) to 10 (optimal adherence); disease activity was evaluated with ASDAS-CRP. A multivariable regression analysis was conducted to identify independent predictors of PREDIMED and of ASDAS-CRP improvement (improvement ≥ 20% of each score).

Results

A total of 161 patients were included: 81 receiving nutritional advice and 80 controls; 47 in the nutritional group and 63 controls had complete information until month 6. Overall, 40 (36.4%) were females, the mean age was 51.7 ± 1.3 years, and 58 (52.7%) were affected with psoriasis. No relevant change of anthropometric or laboratory measures was observed in either group. Adherence to the Mediterranean diet was moderate (PREDIMED score 6.7 ± 1.8 at baseline; 7.6 ± 2.1 at month 6) and improved more in the nutritional group compared to controls (p = 0.020). Predictors of a PREDIMED improvement ≥ 20% were receiving nutritional advice (OR 4.53, 1.36–15.1, p = 0.014), age (per 10-year increase OR 1.05, 1.02–1.68, p = 0.007), and BMI (OR 0.77, 0.63–0.9, p = 0.006). An ASDAS-CRP improvement ≥ 20% was more frequent in the nutritional group compared to controls (p = 0.020). A PREDIMED improvement ≥ 20% was associated with a ASDAS-CRP improvement ≥ 20% (OR 6.75,1.8–25.3, p = 0.005). Psoriasis and disease duration were negatively but not significantly associated to the ASDAS-CRP improvement.

Conclusions

Improving adherence to the Mediterranean diet may have a beneficial impact on the activity of axSpA. Patients with a lower BMI and older patients are more prone to modify their diet towards the Mediterranean diet following nutritional advice. Patients with psoriasis may have a limited benefit from dietary improvement.

Study registration

Protocol No. 52723, Padova Hospital Medical Ethical Committee (October 11, 2010).
Appendix
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Metadata
Title
Mediterranean diet in axial spondyloarthritis: an observational study in an Italian monocentric cohort
Authors
Francesca Ometto
Augusta Ortolan
Davide Farber
Mariagrazia Lorenzin
Giulia Dellamaria
Giacomo Cozzi
Marta Favero
Romina Valentini
Andrea Doria
Roberta Ramonda
Publication date
01-12-2021
Publisher
BioMed Central
Published in
Arthritis Research & Therapy / Issue 1/2021
Electronic ISSN: 1478-6362
DOI
https://doi.org/10.1186/s13075-021-02600-0

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