calculate_dcs_1993_lm_cad_ptp {pretestcad}R Documentation

Calculate 1993 Duke Clinical Score for Left Main Disease

Description

This function returns a patient's pre-test probability (PTP) of severe (>75% luminal diameter narrowing of the left main coronary artery) coronary artery disease based on the 1993 Duke Clinical Score.

Usage

calculate_dcs_1993_lm_cad_ptp(
  age,
  sex,
  have_typical_chest_pain,
  have_peripheral_vascular_disease,
  have_cerebrovascular_disease,
  have_carotid_bruits,
  duration_of_cad_symptoms_year,
  max_na_vascular_disease_index = 0,
  max_age = 65
)

Arguments

age

Input integer value to indicate the age of the patient.

sex

Input characters (female, male) to indicate the sex of the patient.

  • female

  • male

have_typical_chest_pain

Input characters (no, yes) to indicate if the patient has typical chest pain.

  • no stands for the patient not having typical chest pain.

  • yes stands for the patient having typical chest pain.

have_peripheral_vascular_disease

Input characters (no, yes) to indicate if the patient has peripheral vascular disease.

  • no stands for not having peripheral vascular disease.

  • yes stands for having peripheral vascular disease.

have_cerebrovascular_disease

Input characters (no, yes) to indicate if the patient has cerebrovascular disease.

  • no stands for not having cerebrovascular disease.

  • yes stands for having cerebrovascular disease.

have_carotid_bruits

Input characters (no, yes) to indicate if the patient has carotid bruits.

  • no stands for not having carotid bruits.

  • yes stands for having carotid bruits.

duration_of_cad_symptoms_year

Input integer to indicate the duration of coronary artery disease symptoms in years.

max_na_vascular_disease_index

Input integer 0 to 3 to indicate the maximum number of missing disease history to tolerate before outputting an NA. Default: 0

max_age

Input positive integer to indicate the maximum age to tolerate before outputting an NA. In the Duke Clinical Score 1993 paper, the maximum value is set as 65. Default: 65

Details

The predictive model is based on patients referred for cardiac catheterisation between 1969 and 1983.

Value

A numeric value representing the patient's PTP for left main disease (>75% luminal diameter narrowing of the left main coronary artery) based on the 1993 Duke Clinical Score.

Examples

# 40 year old female with typical chest pain for one year,
# She has peripheral vascular and cerebrovascular disease.

calculate_dcs_1993_lm_cad_ptp(
    age = 40,
    sex = "female",
    have_typical_chest_pain = "yes",
    have_peripheral_vascular_disease = "yes",
    have_cerebrovascular_disease = "yes",
    have_carotid_bruits = "no",
    duration_of_cad_symptoms_year = 1,
)


[Package pretestcad version 1.0.2 Index]