Patients identified to be at nutrition risk require a diagnosis to confirm malnutrition. Subjective global assessment (SGA) is the gold standard for diagnosing malnutrition. SGA is a simple bedside method used to diagnose malnutrition and identify those who would benefit from nutrition care. The assessment includes taking a history of recent intake, weight change, gastrointestinal symptoms and a clinical evaluation. SGA has been validated in a variety of patient populations. To order the updated (2015) SGA video please go to this link: https://www.cns-scn.ca/education-portal/view/subjective-global-assessment-video. SGA training is also available through the CMTF.
How do I diagnose malnutrition? (expand +/-)
Subjective global assessment (SGA) (http://www.nutritioncareincanada.ca/sites/default/uploads/files/SGA%20Tool%20EN%20colour_2017(1).pdf) is the gold standard for diagnosing malnutrition. It is also recommended by CMTF for triaging nutrition care. SGA is a simple bedside method used to diagnose malnutrition and identify those who would benefit from nutrition care. It provides an accurate diagnosis in 10 minutes. SGA has been validated in a variety of patient populations and is used extensively worldwide to diagnose malnutrition. The SGA assessment includes:
When should SGA be used? (expand +/-)
Dietitians or other trained professionals should conduct SGA within 24 hours of screening a hospital patient as ‘at risk’. SGA should also be used when nutrition risk screening is not possible or necessary for some patients (e.g. those with delirium, dementia, high risk conditions such as trauma, pressure ulcers or SIRS, language difficulties or receiving enteral or parenteral nutrition or recently transferred from critical care). In these cases, SGA should be automatically completed to rule out malnutrition, preferably on the first day of admission. When developing your screening and assessment process for triaging patients, make sure that staff knows the process (i.e. automatic referral) and what to do for these patients who cannot be screened.
How do I triage patients using SGA? (expand +/-)
The SGA score triages patients into SGA A, B or C. Within INPAC, the routes of care for each level are:
Key tips (expand +/-)
The following are tips to facilitate detection and treatment of malnutrition using SGA.
Medical directive - Registered Dietitians to assess and implement, diagnose and communicate malnutrition
Thanks to St. Michael's Hospital in Toronto for sharing this document with CMTF.
This PowerPoint presentation explains why SGA is part of the algorithm INPAC and it shows examples of well-nourished (SGA A), mildly/moderately (SGA B) and severely malnourished patients.
Frequently Asked Questions from dietitians who use SGA
SGA in a Nutrition Assessment
Example of incorporating SGA into a nutrition assessment
Diet Technician involvement in SGA
A dietitian’s perspective of using SGA in her practice
This brief article describes the positive change in this dietitian’s practice
Review of SGA, focusing on when and how to effectively use it in everyday practice. Dr Khush Jeejeebhoy, MB
CMTF presentations from the Annual CNS Meeting – June 2014
The SGA form and guidance document in pocket guide format
Case study of patient and chart note
This is an example of a chart note using Nutrition Care Process Terminology
Statistics Canada reference values for maximum grip strength, by sex and age
The source of this information is the 2007 to 2013 Canadian Health Measures Survey
Acknowledgment: The ideas and resources included on this page are provided in part by the hospitals involved in the More-2-Eat project.
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