NAME: The ICU Data (ICU.DAT) KEYWORDS: Logistic Regression SIZE: 200 observations, 21 variables SOURCE: Hosmer and Lemeshow (2000) Applied Logistic Regression: Second Edition. These data are copyrighted by John Wiley & Sons Inc. and must be acknowledged and used accordingly. Data were collected at Baystate Medical Center in Springfield, Massachusetts. DESCRIPTIVE ABSTRACT: The ICU data set consists of a sample of 200 subjects who were part of a much larger study on survival of patients following admission to an adult intensive care unit (ICU). The major goal of this study was to develop a logistic regression model to predict the probability of survival to hospital discharge of these patients and to study the risk factors associated with ICU mortality. A number of publications have appeared which have focused on various facets of the problem. The reader wishing to learn more about the clinical aspects of this study should start with Lemeshow, Teres, Avrunin, and Pastides (1988). LIST OF VARIABLES: Column Position Name Codes/Values Abbreviations ------------------------------------------------------------------------------- 6-8 Identification Code ID Number ID 11 Vital Status 0 = Lived STA 1 = Died 14-15 Age Years AGE 18 Sex 0 = Male SEX 1 = Female 21 Race 1 = White RACE 2 = Black 3 = Other 24 Service at ICU Admission 0 = Medical SER 1 = Surgical 27 Cancer Part of Present 0 = No CAN Problem 1 = Yes 30 History of Chronic Renal O = No CRN Failure 1 = Yes 33 Infection Probable at ICU 0 = No INF Admission 1 = Yes 36 CPR Prior to ICU Admission 0 = No CPR 1 = Yes 39-41 Systolic Blood Pressure at mm Hg SYS ICU Admission 44-46 Heart Rate at ICU Admission Beats/min HRA 49 Previous Admission to an ICU 0 = No PRE within 6 Months 1 = Yes 52 Type of Admission 0 = Elective TYP 1 = Emergency 55 Long Bone, Multiple, Neck, 0 = No FRA Single Area, or Hip Fracture 1 = Yes 58 PO2 from Initial Blood Gases 0 = > 60 PO2 1 = < 60 61 PH from Initial Blood Gases 0 => 7.25 PH 1 =< 7.25 64 PCO2 from initial Blood 0 = < 45 PCO Gases 1 = > 45 67 Bicarbonate from Initial 0 = > 18 BIC Blood Gases 1 = < 18 70 Creatinine from Initial Blood 0 = < 2.0 CRE Gases 1 = > 2.0 73 Level of Consciousness at ICU O = No Coma LOC Admission or Stupor 1 = Deep stupor 2 = Coma ---------------------------------------------------------------------------- PEDAGOGICAL NOTES: These data have been used to fit an ordinary logistic regression model and for various exercises involving logistic regression. REFERENCES: 1. Hosmer and Lemeshow, Applied Logistic Regression, Wiley, (1989). 2. Lemeshow, S., Teres, D., Avrunin, J. S., Pastides, H. (1988). Predicting the Outcome of Intensive Care Unit Patients. Journal of the American Statistical Association, 83, 348-356. ID STA AGE SEX RACE SER CAN CRN INF CPR SYS HRA PRE TYP FRA PO2 PH PCO BIC CRE LOC 8 0 27 1 1 0 0 0 1 0 142 88 0 1 0 0 0 0 0 0 0 12 0 59 0 1 0 0 0 0 0 112 80 1 1 0 0 0 0 0 0 0 14 0 77 0 1 1 0 0 0 0 100 70 0 0 0 0 0 0 0 0 0 28 0 54 0 1 0 0 0 1 0 142 103 0 1 1 0 0 0 0 0 0 32 0 87 1 1 1 0 0 1 0 110 154 1 1 0 0 0 0 0 0 0 38 0 69 0 1 0 0 0 1 0 110 132 0 1 0 1 0 0 1 0 0 40 0 63 0 1 1 0 0 0 0 104 66 0 0 0 0 0 0 0 0 0 41 0 30 1 1 0 0 0 0 0 144 110 0 1 0 0 0 0 0 0 0 42 0 35 0 2 0 0 0 0 0 108 60 0 1 0 0 0 0 0 0 0 50 0 70 1 1 1 1 0 0 0 138 103 0 0 0 0 0 0 0 0 0 51 0 55 1 1 1 0 0 1 0 188 86 1 0 0 0 0 0 0 0 0 53 0 48 0 2 1 1 0 0 0 162 100 0 0 0 0 0 0 0 0 0 58 0 66 1 1 1 0 0 0 0 160 80 1 0 0 0 0 0 0 0 0 61 0 61 1 1 0 0 1 0 0 174 99 0 1 0 0 1 0 1 1 0 73 0 66 0 1 0 0 0 0 0 206 90 0 1 0 0 0 0 0 1 0 75 0 52 0 1 1 0 0 1 0 150 71 1 0 0 0 0 0 0 0 0 82 0 55 0 1 1 0 0 1 0 140 116 0 0 0 0 0 0 0 0 0 84 0 59 0 1 0 0 0 1 0 48 39 0 1 0 1 0 1 1 0 2 92 0 63 0 1 0 0 0 0 0 132 128 1 1 0 0 0 0 0 0 0 96 0 72 0 1 1 0 0 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