cliot (version 1.0.0)

kocher_septic_arthritis: Kocher Criteria for Septic Arthritis

Description

Calculates the Kocher Score to estimate the probability of septic arthritis in a pediatric patient presenting with a painful hip. The score is based on four clinical predictors: non-weight bearing, fever, elevated ESR, and elevated WBC count.

Usage

kocher_septic_arthritis(non_weight_bearing, temp_gt_38_5, esr_gt_40, wbc_gt_12000)

Value

A list containing:

Kocher_Score

The calculated score (Range 0-4).

Septic_Arthritis_Probability

Estimated probability of septic arthritis based on the original validation data.

Arguments

non_weight_bearing

Numeric (0 or 1). Is the patient unable to bear weight on the affected side? (1 = Yes).

temp_gt_38_5

Numeric (0 or 1). Is the patient's temperature > 38.5 degrees Celsius? (1 = Yes).

esr_gt_40

Numeric (0 or 1). Is the Erythrocyte Sedimentation Rate (ESR) > 40 mm/hr? (1 = Yes).

wbc_gt_12000

Numeric (0 or 1). Is the White Blood Cell (WBC) count > 12,000 cells/mm^3? (1 = Yes).

References

Kocher MS, Zurakowski D, Kasser JR. Differentiating between septic arthritis and transient synovitis of the hip in children: an evidence-based clinical prediction algorithm. J Bone Joint Surg Am. 1999;81(12):1662-1670.

Examples

# Example 1: High Probability
# Non-weight bearing (1), Fever (1), ESR 50 (1), WBC 15k (1)
# Score = 4
kocher_septic_arthritis(1, 1, 1, 1)

# Example 2: Low Probability
# Non-weight bearing (1), No fever, ESR 10, WBC 8k
# Score = 1
kocher_septic_arthritis(1, 0, 0, 0)