sich_score: Secondary Intracerebral Hemorrhage (sICH) Score

In cliot: Clinical Indices and Outcomes Tools

Secondary Intracerebral Hemorrhage (sICH) Score

Description

Calculates the sICH score to predict the likelihood of an underlying vascular etiology (e.g., AVM, aneurysm, fistula) in patients with non-traumatic intracerebral hemorrhage. The score guides the decision to perform further vascular imaging (CTA, MRA, or DSA).

Usage

sich_score(ncct_probability, age, sex, history_hypertension, impaired_coagulation)

Arguments

ncct_probability	String. Assessment of vascular cause probability based on Non-Contrast CT. "high": Enlarged vessels, calcifications along margins, or venous sinus hyperattenuation (2 pts). "indeterminate": Unusual shape, edema disproportionate to time, or isolated subarachnoid hemorrhage (1 pt). "low": Typical deep/ganglionic hemorrhage without above features (0 pts).
age	Numeric. Patient age in years. 18-45: 2 pts. 46-70: 1 pt. >=71: 0 pts.
sex	String. "Male" (0 pts) or "Female" (1 pt).
history_hypertension	Numeric (0 or 1). History of hypertension. (0 = No, 1 = Yes).
impaired_coagulation	Numeric (0 or 1). Impaired coagulation (e.g., INR > 3, antiplatelet therapy). (0 = No, 1 = Yes). Note: The score adds 1 point if *neither* hypertension *nor* impaired coagulation is present.

Value

A list containing:

sICH_Score	The calculated score (Range 0-6).
Risk_Probability	Estimated probability of a vascular etiology.
Recommendation	Guidance on the need for vascular imaging.

References

Delgado Almandoz JE, Schaefer PW, Goldstein JN, et al. Practical scoring system for the identification of patients with intracerebral hemorrhage at highest risk of harboring an underlying vascular etiology: the Secondary Intracerebral Hemorrhage Score. AJNR Am J Neuroradiol. 2010;31(9):1653-1660. doi:10.3174/ajnr.A2156

Examples

# Example 1: High Risk
# High NCCT probability (+2), 30yo (+2), Female (+1), No HTN/Coag (+1)
# Score = 6
sich_score("high", 30, "female", 0, 0)

# Example 2: Low Risk
# Low NCCT (0), 75yo (0), Male (0), History of HTN (0 pts for 'neither' condition)
# Score = 0
sich_score("low", 75, "male", 1, 0)

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