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1.4.5 Intensive Care Unit Data Set

The Intensive Care Unit data set consists of 200 observations on subjects involved in a study on the survival of patients following admission to an adult intensive care unit (ICU). The data set was collected at the Baystate Medical Center in Springfield, Massachusetts, and the variables included in this data set are summarized in Table 1.5.

Table 1.5 A Description of the Variables in the Intensive Care Unit Data Set

Variable	Description	Codes/values	Name
1	Identification code	ID number	ID
2	Vital status	0 = Lived	STA
		1 = Died
3	Age	Years	AGE
4	Sex	0 = Male	SEX
		1 = Female
5	Race	1 = White	RACE
		2 = Black
		3 = Other
6	Service at ICU admission	0 = Medical	SER
		1 = Surgical
7	Cancer part of	0 = No	CAN
	present problem	1 = Yes
8	History of chronic	0 = No	CRN
	renal failure	1 = Yes
9	Infection probable at	0 = No	INF
	ICU admission	1 = Yes
10	CPR prior to	0 = No	CPR
	ICU admission	1 = Yes
11	Systolic blood pressure	mmHg	SYS
	at ICU admission
12	Heart rate at	Beats/min	HRA
	ICU admission
13	Previous admission to an	0 = No	PRE
	ICU within 6 months	1 = Yes
14	Type of admission	0 = Elective	TYP
		1 = Emergency
15	Long bone, multiple, neck	0 = No	FRA
	single area, or hip fracture	1 = Yes
16	pO2 from initial	0 = > 60	PO2
	blood gases	1 = < 60
17	pH from initial	0 = > 7.25	PH
	blood gases	1 = < 7.25
18	pCO2 from initial	0 = < 45	PCO
	blood gases	1 = > 45
19	Bicarbonate from	0 = > 18	BIC
	Initial blood gases	1 = < 18
20	Creatinine from	0 = < 2.0	CRE
	initial blood gases	1 = > 2.0
21	Level of consciousness	0 = No coma or stupor	LOC
	at ICU admission	1 = Deep stupor
		2 = Coma

Applied Biostatistics for the Health Sciences

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