alt_70_cellulitis: ALT-70 Score for Cellulitis

In cliot: Clinical Indices and Outcomes Tools

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)

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).

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).

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)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.