Table 1.

MI-EMSIS analysis variables. Eighteen variables were chosen based on their clinical significance, relevance to public health, and importance for evaluating EMS quality. The table below displays their types, descriptions, and criteria for being determined missing and/or invalid.

Variable type	Variable	Description	Missing and/or invalid criteria
Demographics	Age	Age of patient	Blank or value less than 0 or greater than 115
	Gender	Gender of patient	Blank or not applicable, not available, not recorded, not reported
	Race	Race/ethnicity of patient	Blank or not applicable or not available or not recorded or not reported
Location	Patient’s Home Zip	Zip code of patient residence	Blank or more or less than 5 digits, or any alphanumeric characters
	Incident Zip Code	Zip code of incident location	Blank or more or less than 5 digits, or any alphanumeric characters
	Destination Name	Name of patient’s destination facility	Blank
	Destination Code	Type of destination	Blank
Clinical Narrative	Chief Complaint Narrative	Provider’s narrative of patient’s chief complaint	Blank
	Provider Primary Impression	Provider’s primary impression narrative	Blank
	Medication Allergies	Patient’s reported medication allergies	Blank
	Medical Surgical History	Patient’s medical/surgical history	Blank
	Current Medication Name	Patient’s current medications	Blank
Vital Signs	SBP	Patient’s systolic blood pressure	Blank or alphanumeric or anything other than two or three digits
	DBP	Patient’s diastolic blood pressure	Blank or alphanumeric or anything other two or three digits
	Pulse Rate	Patient’s pulse rate	Blank or alphanumeric or, greater than 300, or less than 5
	Pulse Oximetry	Patient’s pulse oximetry	Blank or negative or less than two digits or greater than 100 or with decimal points
	Respiratory Rate	Patient’s respiratory rate	Blank or more than two digits or alphanumeric characters are invalid
	Body Temperature	Patient’s body temperature	Blank is missing, negative is invalid, less than two digits is invalid