calculate_champ: calculate_champ: Calculate the risk for 30 mortality using...

In laamit/champCalculator: CHAMP calculator

calculate_champ: Calculate the risk for 30 mortality using CHAMP

Description

Calculates the CHAMP 30 day mortality risk for the given values. All the variables need to be of the same length. NA values are allowed for *gcs*, *pulse*, *sbp*, *cardiac_rhythm*, and *spo2* as the calculator will automatically select the model fitted for those variables.

Usage

calculate_champ(
  sbp,
  pulse,
  spo2,
  gcs,
  time_from_alarm,
  age,
  cardiac_rhythm,
  medical_facility,
  vehicle_ground_unit,
  sex_man,
  code,
  limit_values = TRUE,
  errors_as_warnings = FALSE
)

Arguments

sbp	Systolic blood pressure (mmHg). Missing values allowed.
pulse	Heart rate (bpm). Missing values allowed.
spo2	Oxygen saturation ( Missing values allowed.
gcs	Glasgow Coma Scale. Missing values allowed.
time_from_alarm	Time from alarm to HEMS arrival (minutes).
age	Age in years.
cardiac_rhythm	Cardiac rhythm (VF, VT, Asystole, PEA). Missing values allowed.
medical_facility	Medical facility or nursing home as TRUE/FALSE or 1/0
vehicle_ground_unit	HEMS vehicle ground unit (vs helicopter) as TRUE/FALSE or 1/0.
sex_man	Patient sex male, TRUE/FALSE or 1/0.
code	Patient group i.e. "cardiac arrest", "trauma", "respitory failure", "chest pain", "stroke", "neurological", "psychiatric or intoxication", or "other". All other non-missing values are assumed to not be in any of those groups and instead belong to "Gynaecology and obstetrics" and "Infection" groups.
limit_values	Should values be winsorized to match the original data set better? Default FALSE. Limits the values below / larger than 0.5th and 99.5th percentiles to the percentile values. Note: Some variables such as *time_from_alarm* can have really long tales in outlier cases leading to questionable risk estimates.
errors_as_warnings	Should error's be returned as warnings? Default FALSE.

Value

Vector of risks for each observation.

Examples

calculate_champ(sbp = 100,
               pulse = 100,
               spo2 = 100,
               gcs = 15,
               time_from_alarm = 100,
               cardiac_rhythm = 1,
               age = 20,
               medical_facility = 0,
               vehicle_ground_unit = 1,
               sex_man = 1,
               code = "trauma")
calculate_champ(sbp = 100,
               pulse = 100,
               spo2 = 100,
               gcs = 15,
               time_from_alarm = 100,
               cardiac_rhythm = NA,
               age = 20,
               medical_facility = 0,
               vehicle_ground_unit = 1,
               sex_man = 1,
               code = "trauma")
calculate_champ(sbp = rep(100, 3),
               pulse = rep(100, 3),
               spo2 = rep(100, 3),
               gcs = rep(15, 3),
               time_from_alarm = rep(100, 3),
               cardiac_rhythm = rep(NA, 3),
               age = rep(20, 3),
               medical_facility = rep(0, 3),
               vehicle_ground_unit = rep(1, 3),
               sex_man = rep(1, 3),
               code = rep("trauma", 3))

calculate_champ(sbp = c(100, 200, 300),
               pulse = rep(100, 3),
               spo2 = rep(100, 3),
               gcs = rep(15, 3),
               time_from_alarm = rep(100, 3),
               cardiac_rhythm = rep(NA, 3),
               age = rep(20, 3),
               medical_facility = rep(0, 3),
               vehicle_ground_unit = rep(1, 3),
               sex_man = rep(1, 3),
               code = rep("trauma", 3),
               limit_values = TRUE)

laamit/champCalculator documentation built on Oct. 9, 2024, 4:46 a.m.