cliot (version 1.0.0)

abcd2_tia: ABCD2 Score for TIA

Description

Calculates the ABCD2 Score to estimate the risk of stroke within 2, 7, and 90 days after a Transient Ischemic Attack (TIA). This score is widely used to determine the urgency of evaluation and the need for hospital admission.

Usage

abcd2_tia(age, bp_systolic, bp_diastolic, clinical_features, duration_min, diabetes)

Value

A list containing:

Score

Total ABCD2 Score (Range 0-7).

Risk_Category

Risk classification (Low, Moderate, High).

Stroke_Risk

List of estimated stroke risks at 2, 7, and 90 days.

Management

Recommendation regarding hospital admission.

Arguments

age

Numeric. Patient age in years. (+1 point if >= 60).

bp_systolic

Numeric. Initial systolic blood pressure in mmHg. (+1 point if >= 140 or DBP >= 90).

bp_diastolic

Numeric. Initial diastolic blood pressure in mmHg. (+1 point if >= 90 or SBP >= 140).

clinical_features

Numeric (0, 1, or 2). Description of symptoms. 2: Unilateral weakness (+2 points). 1: Speech disturbance without weakness (+1 point). 0: Other symptoms (+0 points).

duration_min

Numeric. Duration of symptoms in minutes. >= 60 minutes (+2 points). 10-59 minutes (+1 point). < 10 minutes (0 points).

diabetes

Numeric (0 or 1). History of diabetes mellitus (oral medication or insulin). 1: Yes (+1 point). 0: No (0 points).

References

Johnston SC, Rothwell PM, Nguyen-Huynh MN, et al. Validation and refinement of scores to predict very early stroke risk after transient ischaemic attack. Lancet. 2007;369(9558):283-92. doi:10.1016/S0140-6736(07)60150-0

Examples

# Example 1: High Risk
# 65yo, BP 150/90, Unilateral weakness, Duration 45 mins, Diabetes
# Age(1) + BP(1) + Weakness(2) + Duration(1) + Diabetes(1) = 6
abcd2_tia(65, 150, 90, 2, 45, 1)

# Example 2: Low Risk
# 45yo, BP 120/80, Speech disturbance only, Duration 5 mins, No Diabetes
# Age(0) + BP(0) + Speech(1) + Duration(0) + Diabetes(0) = 1
abcd2_tia(45, 120, 80, 1, 5, 0)