crash_chemo_toxicity_score: CRASH Score (Chemotherapy Risk Assessment Scale for High-Age...

In cliot: Clinical Indices and Outcomes Tools

CRASH Score (Chemotherapy Risk Assessment Scale for High-Age Patients)

Description

Calculates the CRASH score to stratify the risk of severe chemotoxicity in patients aged 70 years or older. The tool generates two separate risk scores: one for Grade 4 Hematologic toxicity and one for Grade 3/4 Non-hematologic toxicity. It utilizes geriatric assessment variables (IADL, MMSE, MNA), clinical status (BP, ECOG, LDH), and the chemotherapeutic regimen risk (MAX2 index).

Usage

crash_chemo_toxicity_score(diastolic_bp, iadl_score, ldh_elevated,
                           chemo_risk_max2, ecog_ps, mmse_score, mna_score)

Arguments

diastolic_bp	Numeric. Diastolic blood pressure in mmHg. (<= 72 mmHg adds 2 points to Hematologic score).
iadl_score	Numeric. Instrumental Activities of Daily Living (IADL) score (OARS scale, 0-28). (< 28 adds 2 points to Hematologic score).
ldh_elevated	Numeric (0 or 1). Is Lactate Dehydrogenase (LDH) elevated above normal? (1 = Yes, +2 points to Hematologic score).
chemo_risk_max2	String. Chemotherapy regimen risk based on MAX2 index. Options: "low", "intermediate", "high". (Adds points to both scores: Hema [0/1/1], Non-Hema [0/2/4]).
ecog_ps	Numeric (0-4). ECOG Performance Status. (1-2 adds 1 pt, 3-4 adds 2 pts to Non-Hema score).
mmse_score	Numeric. Mini-Mental State Examination score (0-30). (< 30 adds 1 point to Non-Hema score).
mna_score	Numeric. Mini Nutritional Assessment score (0-30). (< 28 adds 2 points to Non-Hema score).

Value

A list containing:

Scores	Breakdown of Hematologic, Non-Hematologic, and Combined scores.
Hematologic_Toxicity_Risk	Risk category and estimated rate of Grade 4 hematologic toxicity.
Non_Hematologic_Toxicity_Risk	Risk category and estimated rate of Grade 3/4 non-hematologic toxicity.

References

Extermann M, Boler I, Reich RR, et al. Predicting the risk of chemotherapy toxicity in older patients: the Chemotherapy Risk Assessment Scale for High-Age Patients (CRASH) score. Cancer. 2012;118(13):3377-3386. doi:10.1002/cncr.26646

Examples

# Example 1: High Risk Patient
# DBP 70 (+2), IADL 25 (+2), LDH High (+2), Chemo High (+1 Hema, +4 Non-Hema)
# ECOG 1 (+1), MMSE 29 (+1), MNA 25 (+2)
# Hema Score: 2+2+2+1 = 7 (High Risk)
# Non-Hema Score: 1+1+2+4 = 8 (High Risk)
crash_chemo_toxicity_score(70, 25, 1, "high", 1, 29, 25)

# Example 2: Low Risk Patient
# DBP 80 (0), IADL 28 (0), LDH Normal (0), Chemo Low (0)
# ECOG 0 (0), MMSE 30 (0), MNA 30 (0)
# Hema Score: 0, Non-Hema Score: 0
crash_chemo_toxicity_score(80, 28, 0, "low", 0, 30, 30)

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