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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 11
An Interactive Tutorial for SPSS 10.0 for Windows©
by
Julia Hartman
Binomial Logistic Regression
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 22
Binomial Logistic Regression:Binomial Logistic Regression:
IntroductionIntroduction
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According to SPSS Help, Logistic Regression:
…is useful for situations in which you want to be able to predict the presence or absence of a characteristic or outcome based on values of a set of predictor variables. It is similar to a linear regression model but is suited to models where the dependent variable is dichotomous. Logistic regression coefficients can be used to estimate odds ratios for each of the independent variables in the model.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 33
Binomial Logistic Regression:Binomial Logistic Regression:
IntroductionIntroduction
This tutorial will use logistic regression to determine if the year of matriculation, gender, and US Medical Licensing Exam (Part 2) scores be used to predict whether or not physicians are board-certified in a primary care specialty (Family Medicine, Internal Medicine, Pediatrics, Ob-Gyn).
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 44
Binomial Logistic Regression:Binomial Logistic Regression:
IntroductionIntroduction
• Independent variables (covariates)
matyr: Matriculation year (continuous)
gender: Gender of student (1 = female, 2 = male)
usmle2: USMLE Step 2 (continuous)
• Dependent variable
primcare: Board certified in Primary Care specialty
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 55
Binomial Logistic Regression:Binomial Logistic Regression:
Starting the ProcedureStarting the Procedure
• In the menu, clickAnalyze
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 66
Binomial Logistic Regression: Binomial Logistic Regression:
Starting the ProcedureStarting the Procedure
• In the menu, click onAnalyze
• Point to Regression
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 77
• In the menu, click onAnalyze
• Point to Regression
• Point to Binary Logistic…
Binomial Logistic Regression: Binomial Logistic Regression:
Starting the ProcedureStarting the Procedure
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 88
• In the menu, click onAnalyze
…and click.
• Point to Regression
• Point to Binary Logistic…
Binomial Logistic Regression: Binomial Logistic Regression:
Starting the ProcedureStarting the Procedure
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 99
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Choose the variables for analysis from the list in the variable box.
Scroll down the list,
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1010
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Choose the variables for analysis from the list in the variable box.
Scroll down the list, point to primcare (the dependent variable), which is labeledBoard Certified in FM,
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1111
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Choose the variables for analysis from the list in the variable box.
…and click.
Scroll down the list, point to primcare (the dependent variable), which is labeledBoard Certified in FM, IM, Peds or Ob-Gyn
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1212
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Move primcare to the box labeledDependent by clicking the arrow.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1313
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Scroll back up the variable list,
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1414
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Scroll back up the variable list, point toMATRICULATON DATE – YEAR [matyr]
…and click.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1515
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Move matyr to the box labeled
Covariates by clicking the arrow.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1616
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Point to GENDER OF STUDENT
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1717
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
…and click.
Point to GENDER OF STUDENT [gender]
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1818
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Move gender to the box labeled
Covariates by clicking the arrow.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 1919
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Scroll down the variable list,
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2020
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Scroll down the variable list, point toUSMLE STEP 2 TOTAL
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2121
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
…and click.
Scroll down the variable list, point toUSMLE STEP 2 TOTAL [usmle2]
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2222
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting VariablesSelecting Variables
Move usmle2 to the box labeled Covariates by clicking the arrow.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2323
Binomial Logistic Regression: Binomial Logistic Regression:
Categorical VariablesCategorical Variables
To designate gender as a categorical variable, click the button labeled Categorical.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2424
Binomial Logistic Regression: Binomial Logistic Regression:
Categorical VariablesCategorical Variables
Click gender in the box labeled Covariates
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2525
Binomial Logistic Regression: Binomial Logistic Regression:
Categorical VariablesCategorical Variables
Click gender in the box labeled Covariates, then click the arrow to move it to the box labeled Categorical
Covariates.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2626
Binomial Logistic Regression: Binomial Logistic Regression:
Categorical VariablesCategorical Variables
Click the Continue button.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2727
Binomial Logistic Regression: Binomial Logistic Regression:
Specifying OptionsSpecifying Options
Specify options by clicking the button labeledOptions…
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2828
Binomial Logistic Regression: Binomial Logistic Regression:
Specifying OptionsSpecifying Options
Click the checkbox for Classification plots.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 2929
In SPSS, you can display information by right-clicking, but right-clicking doesn’t work in this tutorial.
To see what wouldhappen, left-click the box for Hosmer-Lemeshow goodness-of-fit.
Binomial Logistic Regression: Binomial Logistic Regression:
Specifying OptionsSpecifying Options
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3030
Binomial Logistic Regression: Binomial Logistic Regression:
Specifying OptionsSpecifying Options
For this tutorial, click the checkbox forHosmer-Lemeshow goodness-of-fit.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3131
Binomial Logistic Regression: Binomial Logistic Regression:
Specifying OptionsSpecifying Options
Click the Continue button.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3232
The covariates can be entered into the analysis using six different methods. This tutorial includes the Enter and Forward: LR methods.
Choose one of the following:
Binomial Logistic Regression: Binomial Logistic Regression:
Selecting a Method of EntrySelecting a Method of Entry
• Enter
• Forward: LR
Click the printer for an important note about printing output with
classification plots.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3333
Enter is the default method of entering covariates.
Click the OK button to run the procedure.
Binomial Logistic Regression: Binomial Logistic Regression:
Enter MethodEnter Method
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3434
Binomial Logistic Regression Output Binomial Logistic Regression Output
Case Processing SummaryCase Processing Summary
The labels and format of your output may be somewhat different.
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3535
Binomial Logistic Regression Output Binomial Logistic Regression Output
Variable CodingVariable Coding
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3636
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Beginning Block: Classification TableBeginning Block: Classification Table
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3737
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Beginning Block: Variables in the EquationBeginning Block: Variables in the Equation
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3838
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Chi-Square Tests of CoefficientsChi-Square Tests of Coefficients
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 3939
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Model SummaryModel Summary
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4040
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Hosmer-Lemeshow Contingency TableHosmer-Lemeshow Contingency Table
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4141
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Classification TableClassification Table
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4242
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Variables in the EquationVariables in the Equation
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4343
Binomial Logistic Regression Output (Enter Method)Binomial Logistic Regression Output (Enter Method)
Classification PlotClassification Plot
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4444
• Return to the list of tutorials
An Interactive Tutorial for An Interactive Tutorial for SPSS 10.0 for WindowsSPSS 10.0 for Windows©©::
Binomial Logistic RegressionBinomial Logistic Regression
• Repeat this tutorial
Choose one of the following:
• Select the Forward: LR method of entry
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4545
Binomial Logistic Regression: Binomial Logistic Regression:
Forward: LR MethodForward: LR Method
To select the Forward: LR (Likelihood Ratio) method of covariate entry, click the drop-down arrow for Method (next to Enter, which is the default method).
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4646
Binomial Logistic RegressionBinomial Logistic Regression
Forward: LR MethodForward: LR Method
Point to Forward: LR
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4747
Binomial Logistic RegressionBinomial Logistic Regression
Forward: LR MethodForward: LR Method
Point to Forward: LR and click.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4848
Binomial Logistic RegressionBinomial Logistic Regression
Forward: LR MethodForward: LR Method
Click the OK button to run the procedure.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 4949
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Case Processing SummaryCase Processing Summary
The labels and format of your output may be somewhat different.
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5050
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Variable CodingVariable Coding
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5151
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Beginning Block: Classification TableBeginning Block: Classification Table
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5252
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Beginning Block: Variables in the EquationBeginning Block: Variables in the Equation
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5353
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Chi-Square Tests of CoefficientsChi-Square Tests of Coefficients
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5454
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Model SummaryModel Summary
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5555
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Hosmer-Lemeshow Contingency TableHosmer-Lemeshow Contingency Table
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5656
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Hosmer-Lemeshow Contingency TableHosmer-Lemeshow Contingency Table
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5757
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Hosmer-Lemeshow Contingency TableHosmer-Lemeshow Contingency Table
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5858
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Classification TableClassification Table
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 5959
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Variables in the EquationVariables in the Equation
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6060
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Model if Term RemovedModel if Term Removed
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6161
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Variables not in the EquationVariables not in the Equation
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6262
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Classification Plot for Step 1Classification Plot for Step 1
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6363
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Classification Plot for Step 2Classification Plot for Step 2
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6464
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Classification Plot for Step 3Classification Plot for Step 3
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© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6565
• Return to the list of tutorials
An Interactive Tutorial for An Interactive Tutorial for SPSS 10.0 for WindowsSPSS 10.0 for Windows©©::
Binomial Logistic RegressionBinomial Logistic Regression
• Repeat this tutorial
Click one of the following:
• Select the Enter method of entry
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6666
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Next
SPSS WILL CRASH if you try to print logistic regression output which includes classification plots.
• You can avoid this problem by printing the output in two parts. Click the button to learn how.
• For more information, click the link below:http://www.spss.com/tech/answer/result.cfm?tech_tan_id=100007850
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6767
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
The classification plot(s) must be printed separately from the rest of the output.
In SPSS, you would begin by right-clicking the plot, but right-clicking doesn’t work in this tutorial.
Click the classification plot.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6868
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Right-clicking opens the shortcut menu.
• Click SPSS Rtf Document Object.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 6969
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Right-clicking opens the shortcut menu.
• Click SPSS Rtf Document Object.
• Then point toOpen
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7070
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Right-clicking opens the shortcut menu.
• Point toSPSS Rtf Document Object.
• Then point toOpen
…and click
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7171
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Print the plot from this new window.
• Click File
This output file has been saved aslogistic (enter 3).spoYour window will be different.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7272
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Print the plot from this new window.• Click File
• Then point to Print
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7373
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Print the plot from this new window.• Click File
• Then point to Print
• Click to print the plot
Of course, the plot won’t print from this tutorial!
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7474
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Close the window.
• Click File
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7575
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Close the window.
• Click File
• Then click
Exit & Return to (the file name--in this example)logistic (enter 3).spo
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7676
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
In SPSS you would delete the classification plot (still selected) by pressing the delete key, but that won’t work in this tutorial.
Next
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7777
Binomial Logistic Regression Output (Forward: LR Method)Binomial Logistic Regression Output (Forward: LR Method)
Printing Logistic Regression OutputPrinting Logistic Regression Output
Next
Print the rest of the output as usual, either from the File menu or by clicking the print button on the toolbar.
Remember, you can’t print from the tutorial.
© Copyright 2000, Julia Hartman © Copyright 2000, Julia Hartman 7878
• Resume this tutorial
• Return to the list of tutorials
An Interactive Tutorial for An Interactive Tutorial for SPSS 10.0 for WindowsSPSS 10.0 for Windows©©::
Binomial Logistic RegressionBinomial Logistic Regression
• Repeat this tutorial
Choose one of the following: