cliot (version 1.0.0)

centor_score_modified: Centor Score (Modified/McIsaac) for Strep Pharyngitis

Description

Calculates the Modified Centor (McIsaac) Score to estimate the probability that pharyngitis is caused by Group A Beta-hemolytic Streptococcus (GAS) and to guide testing and antibiotic therapy. This modification adjusts the original Centor criteria for patient age.

Usage

centor_score_modified(age, tonsillar_exudate, tender_anterior_cervical_adenopathy,
                      fever_history, absence_of_cough)

Value

A list containing:

Centor_Score

The calculated score (Range -1 to 5).

Strep_Probability

Estimated risk of streptococcal infection.

Management_Guideline

Recommendations regarding Rapid Antigen Detection Testing (RADT), culture, and antibiotics.

Arguments

age

Numeric. Patient age in years. 3-14 years: +1 point. 15-44 years: 0 points. >= 45 years: -1 point.

tonsillar_exudate

Numeric (0 or 1). Presence of tonsillar swelling or exudate. (1 = Yes, +1 point).

tender_anterior_cervical_adenopathy

Numeric (0 or 1). Presence of tender anterior cervical lymphadenopathy. (1 = Yes, +1 point).

fever_history

Numeric (0 or 1). History of fever (> 38 C / 100.4 F). (1 = Yes, +1 point).

absence_of_cough

Numeric (0 or 1). Absence of cough. (1 = Yes/Absent, +1 point).

References

McIsaac WJ, Kellner JD,ont P, Esmail A, et al. Empirical validation of guidelines for the management of pharyngitis in children and adults. JAMA. 2004;291(13):1587-1595. doi:10.1001/jama.291.13.1587

Centor RM, Witherspoon JM, Dalton HP, Brody CE, Link K. The diagnosis of strep throat in adults in the emergency room. Med Decis Making. 1981;1(3):239-246. doi:10.1177/0272989x8100100304

Examples

# Example 1: High Risk Child
# 10yo (+1), Exudate (+1), Nodes (+1), No Fever (0), No Cough (+1)
# Score = 4
centor_score_modified(10, 1, 1, 0, 1)

# Example 2: Low Risk Adult
# 50yo (-1), No Exudate, No Nodes, Fever (+1), Cough present (0)
# Score = 0
centor_score_modified(50, 0, 0, 1, 0)