Nutrition Risk Screening (NRS-2002) is a vital tool for assessing malnutrition risk in hospitalized adults. It helps healthcare professionals quickly identify patients who need nutritional support, using a simple scoring system based on nutritional status and disease severity.
The NRS-2002 consists of initial and final screening steps, evaluating factors like BMI, weight loss, and illness severity. Scores range from 0 to 7, with higher scores indicating greater nutritional risk. This tool guides interventions and ensures timely nutritional care for at-risk patients.
Target Population and Setting for NRS-2002
Adult Inpatients in Hospital Settings
- The NRS-2002 screens adult patients in the hospital setting for malnutrition risk within the first 48 hours of admission
- Applies to most adult inpatients, but certain groups may need specialized screening (critically ill patients, obese individuals, or those with fluid overload)
Populations Not Validated for NRS-2002
- The tool is not validated for use in pediatric patients, outpatients, or long-term care residents
- These populations require alternative screening methods tailored to their specific needs and settings
- Using NRS-2002 in non-validated populations may lead to inaccurate risk assessments and inappropriate interventions
Components and Scoring System of NRS-2002
Initial and Final Screening Steps
- The NRS-2002 consists of an initial screening and a final screening
- Initial screening assesses four criteria:
- BMI < 20.5 kg/m²
- Weight loss in the past 3 months
- Reduced dietary intake in the preceding week
- Presence of severe illness
- If "Yes" to any initial screening question, the final screening is performed
Final Screening: Impaired Nutritional Status and Disease Severity
- Final screening evaluates impaired nutritional status and severity of disease as a reflection of increased nutritional requirements
- Impaired nutritional status is scored from 0 (absent) to 3 (severe) based on:
- Percent weight loss
- BMI
- General condition
- Severity of disease is scored from 0 (absent) to 3 (severe) based on:
- Patient's medical condition
- Nutritional requirements
- An additional point is added for patients aged ≥70 years to represent elderly frailty
Total NRS-2002 Score Calculation
- The final NRS-2002 score is the sum of:
- Impaired nutritional status score (0-3)
- Severity of disease score (0-3)
- Age adjustment (0 or 1)
- Total scores range from 0 to 7, with higher scores indicating greater nutritional risk
Assessing Nutritional Risk with NRS-2002
Proper Application by Trained Professionals
- NRS-2002 should be completed by trained healthcare professionals (nurses or dietitians) within 48 hours of hospital admission
- Requires accurate anthropometric measurements (height and weight) and thorough medical history
Assessing Weight Loss and Dietary Intake Changes
- Weight loss history should be obtained from patient, relatives, or medical records
- Severity evaluated as percentage of usual body weight
- Dietary intake changes assessed compared to patient's normal pre-hospitalization intake
- Significant reductions may indicate impaired nutritional status
Scoring Disease Severity and Special Considerations
- Disease severity scoring requires knowledge of primary diagnosis, comorbidities, and anticipated nutritional requirements
- Examples of severe diseases: head injury, bone marrow transplantation, intensive care patients (APACHE score > 10)
- Special considerations for patients with altered body composition or fluid balance (obese, edema, ascites)
- May require adjustments to BMI interpretation or weight loss assessment
Interpreting NRS-2002 Scores for Intervention
Identifying Patients at Nutritional Risk
- NRS-2002 score ≥3 indicates nutritional risk, requires intervention and weekly rescreening
- Score of 3: moderate risk
- Scores ≥4: high risk
- Patients with score <3 should be rescreened weekly during hospitalization to monitor changes
Guiding Nutritional Intervention Based on Score
- Higher scores indicate greater need for prompt, aggressive nutritional therapy
- Scores ≥5 may require intensive interventions (enteral or parenteral nutrition)
- Interventions should be tailored to individual patient based on:
- Specific nutritional deficits
- Disease state
- Tolerance
- NRS-2002 score alone does not dictate the type of nutritional therapy required
Collaborative Care Planning and Monitoring
- Nutritional care plans should be developed with a registered dietitian and interdisciplinary medical team
- Regular monitoring and reassessment crucial to:
- Evaluate effectiveness of interventions
- Adjust care plans as needed
- Ongoing communication and documentation ensure continuity of care and optimal outcomes