Nutritional Risk Screening 2002 (NRS 2002)

Nutritional Risk Screening 2002 (NRS 2002) is a screening tool developed for hospital inpatients and recommended by the European Society for Clinical Nutrition and Metabolism (ESPEN). It grades both impaired nutritional status and disease severity, and adds a point for older age, to identify patients likely to benefit from nutritional support.

Definition

NRS 2002 is a hospital screening tool that scores impaired nutritional status (from weight loss, low body mass index, and reduced intake) and severity of disease, each from absent to severe, with an added point for age 70 or over, to flag patients at nutritional risk.

Scope

The entry describes the structure and logic of NRS 2002, its grounding in an analysis of controlled clinical trials, and its role within ESPEN screening guidance. It is a methodological reference topic and does not give clinical scoring decisions or treatment instructions.

Key concepts

• Initial screening then final screening
• Impaired nutritional status score
• Severity of disease score
• Age adjustment (70 years or older)
• Total score and risk threshold
• Derivation from controlled clinical trials
• Hospital inpatient focus

Mechanisms

NRS 2002 first applies a short initial screen; if any item is positive, a final screen scores two components. One component grades impaired nutritional status using recent weight loss, body mass index, and reduced food intake; the other grades the severity of disease as a proxy for increased nutritional requirements. The two component scores are added, and an extra point is given for age 70 or over. A defined total triggers a nutritional care plan. Distinctively, Kondrup and colleagues derived the scoring by analyzing randomized controlled trials, so the threshold is anchored to the level of risk at which nutritional support showed benefit in trials.

Clinical relevance

NRS 2002 is the tool recommended by ESPEN for nutrition screening in the hospital setting and is recognized within the GLIM framework as a screening route to malnutrition diagnosis. As a reference topic this entry explains the tool's construction and validation basis and does not provide individualized scoring or treatment guidance.

Epidemiology

NRS 2002 is widely used in acute hospitals internationally, where studies report varying proportions of inpatients at nutritional risk depending on the patient mix. Its design for the inpatient population distinguishes it from tools intended primarily for community or geriatric use.

History

NRS 2002 was developed by Kondrup and colleagues and published in 2003, with its scoring derived from an analysis of controlled trials of nutritional support. The same year, the ESPEN screening guidelines recommended NRS 2002 for hospital inpatients, alongside MUST for the community and the MNA for older adults. The later GLIM consensus positioned such screening tools as the entry point to a standardized malnutrition diagnosis.

Debates

Scoring disease severity

NRS 2002's severity-of-disease component requires the rater to match a patient's condition to graded examples, which introduces judgement and has prompted discussion about consistency across assessors and case mixes.

Key figures

• Jens Kondrup
• Henrik Hojgaard Rasmussen
• Zeno Stanga

Seminal works

• kondrup-2003-nrs
• kondrup-2003-guidelines

Frequently asked questions

What makes NRS 2002 different from other screening tools?

It explicitly scores disease severity alongside nutritional status, and its thresholds were derived from an analysis of controlled trials, anchoring the screen to the risk level at which nutritional support showed benefit.

Which population is NRS 2002 designed for?

It was developed for hospital inpatients and is the tool ESPEN recommends for nutrition screening in that setting.