cliot (version 1.0.0)

alt_70_cellulitis: ALT-70 Score for Cellulitis

Description

Calculates the ALT-70 score to predict the likelihood of lower extremity cellulitis. This score helps differentiate true cellulitis from cellulitis mimics (pseudocellulitis) such as stasis dermatitis, which are often misdiagnosed and mistreated with antibiotics.

Usage

alt_70_cellulitis(asymmetry, leukocytosis, tachycardia, age_ge_70)

Value

A list containing:

Total_Score

The calculated ALT-70 score (Range 0-7).

Likelihood

Estimated probability of true cellulitis.

Recommendation

Clinical guidance based on the score (e.g., Consider mimics vs. Treat).

Arguments

asymmetry

Numeric (0 or 1). Is the leg involvement unilateral? (1 = Yes/Asymmetric, 0 = No/Bilateral). Note: Bilateral involvement strongly suggests a mimic. (+3 points).

leukocytosis

Numeric (0 or 1). WBC >= 10,000/uL (or >= 10.0 k/uL). (1 = Yes, +1 point).

tachycardia

Numeric (0 or 1). Heart rate >= 90 bpm. (1 = Yes, +1 point).

age_ge_70

Numeric (0 or 1). Age >= 70 years. (1 = Yes, +2 points).

References

Raff AB, Weng QY, Cohen JM, et al. A predictive model for diagnosis of lower extremity cellulitis: A cross-sectional study. J Am Acad Dermatol. 2017;76(4):618-625.e2. doi:10.1016/j.jaad.2016.12.044

Examples

# Example 1: High Likelihood
# Unilateral leg redness (+3), HR 95 (+1), Age 75 (+2), Normal WBC (0)
# Score = 6
alt_70_cellulitis(1, 0, 1, 1)

# Example 2: Low Likelihood (Likely Stasis Dermatitis)
# Bilateral redness (0), Age 65 (0), No systemic signs
# Score = 0
alt_70_cellulitis(0, 0, 0, 0)