School of Medicine, Western Sydney University, Australia; and NICM Health Research Institute, Western Sydney University, Australia
Lachlan Cribb
Professorial Unit, The Melbourne Clinic, Department of Psychiatry, University of Melbourne, Australia
Chee H. Ng
Professorial Unit, The Melbourne Clinic, Department of Psychiatry, University of Melbourne, Australia
Gerard J. Byrne
University of Queensland Centre for Clinical Research, Royal Brisbane & Women's Hospital, Australia; and Mental Health Service, Royal Brisbane & Women's Hospital, Australia
David Castle
Centre for Complex Interventions, Centre for Addictions and Mental Health, Toronto, Canada; and Department of Psychiatry, University of Toronto, Canada
Vlasios Brakoulias
School of Medicine, Western Sydney University, Australia; and Western Sydney Local Health District Mental Health Service, Australia
Scott Blair-West
Professorial Unit, The Melbourne Clinic, Department of Psychiatry, University of Melbourne, Australia
Georgina Oliver
Professorial Unit, The Melbourne Clinic, Department of Psychiatry, University of Melbourne, Australia
Carolyn Ee
NICM Health Research Institute, Western Sydney University, Australia
IMPACT – the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Australia; and Florey Institute for Neuroscience and Mental Health, Australia
David A. Camfield
IMPACT – the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Australia
Chad Bousman
Department of Psychiatry, University of Melbourne, Australia; and Departments of Medical Genetics, Psychiatry, Physiology and Pharmacology, and Community Health Sciences, University of Calgary, Alberta, Canada
Nathan Dowling
Professorial Unit, The Melbourne Clinic, Department of Psychiatry, University of Melbourne, Australia
Rajshri Roy
Discipline of Nutrition and Dietetics, Faculty of Medical and Health Sciences, The University of Auckland, New Zealand
Michael Berk
IMPACT – the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Geelong, Australia; Department of Psychiatry, University of Melbourne, Australia; Florey Institute for Neuroscience and Mental Health, Melbourne, Australia; Orygen, The National Centre of Excellence in Youth Mental Health, Melbourne, Australia; and Centre for Youth Mental Health, University of Melbourne, Australia
Jerome Sarris
NICM Health Research Institute, Western Sydney University, Australia; and Professorial Unit, The Melbourne Clinic, Department of Psychiatry, University of Melbourne, Australia
Background Many mental disorders, including depression, bipolar disorder and schizophrenia, are associated with poor dietary quality and nutrient intake. There is, however, a deficit of research looking at the relationship between obsessive–compulsive disorder (OCD) severity, nutrient intake and dietary quality. Aims This study aims to explore the relationship between OCD severity, nutrient intake and dietary quality. Method A post hoc regression analysis was conducted with data combined from two separate clinical trials that included 85 adults with diagnosed OCD, using the Structured Clinical Interview for DSM-5. Nutrient intakes were calculated from the Dietary Questionnaire for Epidemiological Studies version 3.2, and dietary quality was scored with the Healthy Eating Index for Australian Adults – 2013. Results Nutrient intake in the sample largely aligned with Australian dietary guidelines. Linear regression models adjusted for gender, age and total energy intake showed no significant associations between OCD severity, nutrient intake and dietary quality (all P > 0.05). However, OCD severity was inversely associated with caffeine (β = −15.50, 95% CI −28.88 to −2.11, P = 0.024) and magnesium (β = −6.63, 95% CI −12.72 to −0.53, P = 0.034) intake after adjusting for OCD treatment resistance. Conclusions This study showed OCD severity had little effect on nutrient intake and dietary quality. Dietary quality scores were higher than prior studies with healthy samples, but limitations must be noted regarding comparability. Future studies employing larger sample sizes, control groups and more accurate dietary intake measures will further elucidate the relationship between nutrient intake and dietary quality in patients with OCD.
