Medical nutrition therapy assessment as part of the multidisciplinary obesity staging system

Cathy Breen; Sarah O; Rachel Crossan; Jessica Mellotte; Grace Maher; Mallory Noone; Amanda Rhynehart; Emer O; Jean O

doi:10.1530/endoabs.115.P9

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Endocrine Abstracts (2026) 115 P9 | DOI: 10.1530/endoabs.115.P9

IES2025 Research, Audit and Quality Improvement Projects Physical Posters (55 abstracts)

Medical nutrition therapy assessment as part of the multidisciplinary obesity staging system

Cathy Breen , Sarah O’Keeffe , Rachel Crossan , Jessica Mellotte , Grace Maher , Mallory Noone , Amanda Rhynehart , Emer O’Malley & Jean O’Connell

Author affiliations

Centre for Obesity Management, St Columcille’s and St Vincent’s University Hospitals, Co. Dublin, Ireland

The Irish Obesity Model of Care recommends multidisciplinary team (MDT) assessment. The Multidisciplinary Obesity Staging System (MOSS) was created to assess obesity complexity from a broad MDT perspective 1. The registered dietitians (RDs) have amended their medical nutrition therapy (MNT) assessment to define obesity complexity from a nutrition perspective in MOSS across 6 key areas. This was a retrospective audit of baseline data in the MOSS electronic database, from its inception in August 2023 to December 2024. Data were gathered and analysed using Microsoft Excel 2010 (Microsoft, USA) and are presented as mean ± standard deviation. Complete MNT assessment data were available on 205 individuals (68.2% female, age 46.7 ± 14 years, body mass index 52.4 ± 11.8kg/m2). Across the 6 domains assessed the sources of nutritional complexity were: biochemical nutritional deficiency (74%); poor nutritional intake - meeting some or minimal requirements (50.7%); disordered eating – chaotic pattern, excessive restriction/rigidity, sensory avoidance, loss of control eating or pica (47%); food insecurity (21.5%); Night Eating Syndrome (14.6%); and limited food preparation / planning skills (7.3%). The majority (59.5%) had 1 or 2 sources of nutritional complexity, while 40.5% had 3 or more. Over half of patients had more than one domain of nutritional complexity. Assessing nutritional complexity is necessary to guide individualisation and intensification of MDT obesity care. Future work will look at changes in nutritional complexity and MOSS following obesity treatment. 1O’Malley et al (2024). A pilot study of the Multidisciplinary Obesity Staging System. Obes Facts. 17 (Suppl. 1): 516–586, LBC 4.22.