cliot (version 1.0.0)

nrs_2002_score: Nutrition Risk Screening 2002 (NRS-2002)

Description

Calculates the NRS-2002 score to assess nutritional risk in hospitalized patients. The score is the sum of a nutritional status score (0-3), a disease severity score (0-3), and an age adjustment (+1 for age >= 70).

Usage

nrs_2002_score(nutritional_score, disease_severity_score, age)

Value

A list containing:

NRS_2002_Score

The calculated total score (Range 0-7).

Interpretation

Clinical interpretation (Score >= 3 indicates nutritional risk).

Arguments

nutritional_score

Numeric (0-3). Impaired nutritional status. 0: Absent. 1 (Mild): Weight loss >5% in 3 months OR Food intake 50-75% in preceding week. 2 (Moderate): Weight loss >5% in 2 months OR BMI 18.5-20.5 + impaired general condition OR Food intake 25-50% in preceding week. 3 (Severe): Weight loss >5% in 1 month (>15% in 3 months) OR BMI <18.5 + impaired general condition OR Food intake 0-25% in preceding week.

disease_severity_score

Numeric (0-3). Severity of disease. 0: Normal nutritional requirements. 1 (Mild): Hip fracture, chronic patients with acute complications (cirrhosis, COPD, hemodialysis, diabetes, oncology). 2 (Moderate): Major abdominal surgery, stroke, severe pneumonia, hematologic malignancy. 3 (Severe): Head injury, bone marrow transplantation, intensive care patients (APACHE >10).

age

Numeric. Patient age in years. (Age >= 70 adds 1 point).

References

Kondrup J, Rasmussen HH, Hamberg O, Stanga Z; Ad Hoc ESPEN Working Group. Nutritional risk screening (NRS 2002): a new method based on an analysis of controlled clinical trials. Clin Nutr. 2003;22(3):321-336. doi:10.1016/s0261-5614(02)00214-5

Examples

# Example 1: At Risk
# Severe weight loss (3), Hip fracture (1), Age 75 (+1)
# Score = 3 + 1 + 1 = 5
nrs_2002_score(3, 1, 75)

# Example 2: Not At Risk
# Mild intake reduction (1), Normal requirements (0), Age 50 (0)
# Score = 1
nrs_2002_score(1, 0, 50)