nemsqar (version 1.0.0)

trauma_03_population: Trauma-03 Populations

Description

Filters data down to the target populations for Trauma-08, and categorizes records to identify needed information for the calculations.

Identifies key categories to records that are 911 request for patients whose pain score was lowered during the EMS encounter. based on specific criteria and calculates related ECG measures. This function segments the data by age into adult and pediatric populations.

Usage

trauma_03_population(
  df = NULL,
  patient_scene_table = NULL,
  response_table = NULL,
  situation_table = NULL,
  disposition_table = NULL,
  vitals_table = NULL,
  erecord_01_col,
  incident_date_col = NULL,
  patient_DOB_col = NULL,
  epatient_15_col,
  epatient_16_col,
  esituation_02_col,
  eresponse_05_col,
  evitals_01_col,
  evitals_27_col = NULL,
  evitals_27_initial_col = NULL,
  evitals_27_last_col = NULL,
  edisposition_28_col,
  transport_disposition_col
)

Value

A list that contains the following:

• a tibble with counts for each filtering step,

• a tibble for each population of interest

• a tibble for the initial population

• a tibble for the total dataset with computations

Arguments

df

A data frame or tibble containing EMS data with all relevant columns. Default is NULL.

patient_scene_table

A data frame or tibble containing only epatient and escene fields as a fact table. Default is NULL.

response_table

A data frame or tibble containing only the eresponse fields needed for this measure's calculations. Default is NULL.

situation_table

A data frame or tibble containing only the esituation fields needed for this measure's calculations. Default is NULL.

disposition_table

A data frame or tibble containing only the edisposition fields needed for this measure's calculations. Default is NULL.

vitals_table

A data frame or tibble containing only the evitals fields needed for this measure's calculations. Default is NULL.

erecord_01_col

The column representing the EMS record unique identifier.

incident_date_col

Column that contains the incident date. This defaults to NULL as it is optional in case not available due to PII restrictions.

patient_DOB_col

Column that contains the patient's date of birth. This defaults to NULL as it is optional in case not available due to PII restrictions.

epatient_15_col

The column for patient age numeric value.

epatient_16_col

The column for patient age unit (e.g., "Years", "Months").

esituation_02_col

The column containing information on the presence of injury.

eresponse_05_col

The column representing the 911 response type.

evitals_01_col

The column for the time of pain scale measurement.

evitals_27_col

The column for the pain scale score. Default is NULL.

evitals_27_initial_col

The column for the initial pain scale score. Default is NULL.

evitals_27_last_col

The column for the last pain scale score. Default is NULL.

edisposition_28_col

The column for patient care disposition details.

transport_disposition_col

The column for patient transport disposition.

Author

Nicolas Foss, Ed.D., MS

Examples

# create tables to test correct functioning

  # patient table
  patient_table <- tibble::tibble(

    erecord_01 = c("R1", "R2", "R3", "R4", "R5"),
    incident_date = as.Date(c("2025-01-01", "2025-01-05",
                              "2025-02-01", "2025-01-01",
                              "2025-06-01")
                              ),
    patient_dob = as.Date(c("2000-01-01", "2020-01-01",
                            "2023-02-01", "2023-01-01",
                            "1970-06-01")
                            ),
    epatient_15 = c(25, 5, 2, 2, 55),  # Ages
    epatient_16 = c("Years", "Years", "Years", "Years", "Years")

  )

  # response table
  response_table <- tibble::tibble(

    erecord_01 = c("R1", "R2", "R3", "R4", "R5"),
    eresponse_05 = rep(2205001, 5)

  )

  # situation table
  situation_table <- tibble::tibble(

    erecord_01 = c("R1", "R2", "R3", "R4", "R5"),
    esituation_02 = rep("Yes", 5),
  )

  # vitals table for a single pain scale column
  vitals_table <- tibble::tibble(

    erecord_01 = c("R1", "R2", "R3", "R4", "R5"),
    evitals_01 = lubridate::as_datetime(c("2025-01-01 12:00:00", "2025-01-05
    18:00:00", "2025-02-01 06:00:00", "2025-01-01 01:00:00", "2025-06-01
    14:00:00"))
  ) |>
    tidyr::uncount(weights = 2) |>  # Duplicate each row twice
    # Assign pain scores
    dplyr::mutate(evitals_27 = c(0, 0, 2, 1, 4, 3, 6, 5, 8, 7)) |>
    dplyr::group_by(erecord_01) |>
    dplyr::mutate(
    # Lower score = later time
      time_offset = dplyr::if_else(dplyr::row_number() == 1, -5, 0),
      evitals_01 = evitals_01 + lubridate::dminutes(time_offset)
    ) |>
    dplyr::ungroup() |>
    dplyr::select(-time_offset)  # Remove temporary column

  # disposition table
  disposition_table <- tibble::tibble(
    erecord_01 = c("R1", "R2", "R3", "R4", "R5"),
    edisposition_28 = rep(4228001, 5),
    edisposition_30 = c(4230001, 4230003, 4230001, 4230007, 4230007)
  )

# test the success of the function
# use the single pain scale column
  result <- trauma_03_population(patient_scene_table = patient_table,
                        response_table = response_table,
                        situation_table = situation_table,
                        vitals_table = vitals_table,
                        disposition_table = disposition_table,
                        erecord_01_col = erecord_01,
                        incident_date_col = incident_date,
                        patient_DOB_col = patient_dob,
                        epatient_15_col = epatient_15,
                        epatient_16_col = epatient_16,
                        eresponse_05_col = eresponse_05,
                        esituation_02_col = esituation_02,
                        evitals_01_col = evitals_01,
                        evitals_27_initial_col = NULL,
                        evitals_27_last_col = NULL,
                        evitals_27_col = evitals_27,
                        edisposition_28_col = edisposition_28,
                        transport_disposition_col = edisposition_30
                        )

# show the results of filtering at each step
result$filter_process