1. An Interactive Tutorial for SPSS 10.0 for Windows©
Binomial Logistic Regression by
Julia Hartman
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© Copyright 2000, Julia Hartman
© Copyright 2000, Julia Hartman

2. Binomial Logistic Regression: Introduction
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.
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3. Binomial Logistic Regression: Introduction
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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4. Binomial Logistic Regression: Introduction
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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5. Binomial Logistic Regression: Starting the Procedure
In the menu, click Analyze
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6. Binomial Logistic Regression: Starting the Procedure
In the menu, click on Analyze
Point to Regression
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7. Binomial Logistic Regression: Starting the Procedure
In the menu, click on Analyze
Point to Regression
Point to Binary Logistic…
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8. Binomial Logistic Regression: Starting the Procedure
In the menu, click on Analyze
Point to Regression
Point to Binary Logistic…
…and click.
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9. Binomial Logistic Regression: Selecting Variables
Choose the variables for analysis from the list in the variable box.
Scroll down the list,
© Copyright 2000, Julia Hartman

10. Binomial Logistic Regression: Selecting 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 labeled Board Certified in FM,
© Copyright 2000, Julia Hartman

11. Binomial Logistic Regression: Selecting 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 labeled Board Certified in FM, IM, Peds or Ob-Gyn
…and click.
© Copyright 2000, Julia Hartman

12. Binomial Logistic Regression: Selecting Variables
Move primcare to the box labeled Dependent by clicking the arrow.
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13. Binomial Logistic Regression: Selecting Variables
Scroll back up the variable list,
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14. Binomial Logistic Regression: Selecting Variables
Scroll back up the variable list, point to
MATRICULATON DATE – YEAR [matyr]
…and click.
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15. Binomial Logistic Regression: Selecting Variables
Move matyr to the box labeled Covariates by clicking the arrow.
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16. Binomial Logistic Regression: Selecting Variables
Point to GENDER OF STUDENT
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17. Binomial Logistic Regression: Selecting Variables
Point to GENDER OF STUDENT [gender]
…and click.
© Copyright 2000, Julia Hartman

18. Binomial Logistic Regression: Selecting Variables
Move gender to the box labeled Covariates by clicking the arrow.
© Copyright 2000, Julia Hartman

19. Binomial Logistic Regression: Selecting Variables
Scroll down the variable list,
© Copyright 2000, Julia Hartman

20. Binomial Logistic Regression: Selecting Variables
Scroll down the variable list, point to
USMLE STEP 2 TOTAL
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21. Binomial Logistic Regression: Selecting Variables
Scroll down the variable list, point to
USMLE STEP 2 TOTAL [usmle2]
…and click.
© Copyright 2000, Julia Hartman

22. Binomial Logistic Regression: Selecting Variables
Move usmle2 to the box labeled Covariates by clicking the arrow.
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23. Binomial Logistic Regression: Categorical Variables
To designate gender as a categorical variable, click the button labeled Categorical.
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24. Binomial Logistic Regression: Categorical Variables
Click gender in the box labeled Covariates
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25. Binomial Logistic Regression: Categorical Variables
Click gender in the box labeled Covariates, then click the arrow to move it to the box labeled Categorical Covariates.
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26. Binomial Logistic Regression: Categorical Variables
Click the Continue button.
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27. Binomial Logistic Regression: Specifying Options
Specify options by clicking the button labeled Options…
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28. Binomial Logistic Regression: Specifying Options
Click the checkbox for Classification plots.
© Copyright 2000, Julia Hartman

29. Binomial Logistic Regression: Specifying Options
In SPSS, you can display information by right-clicking, but right-clicking doesn’t work in this tutorial.
To see what would happen, left-click the box for Hosmer-Lemeshow goodness-of-fit.
© Copyright 2000, Julia Hartman

30. Binomial Logistic Regression: Specifying Options
For this tutorial, click the checkbox for Hosmer-Lemeshow goodness-of-fit.
© Copyright 2000, Julia Hartman

31. Binomial Logistic Regression: Specifying Options
Click the Continue button.
© Copyright 2000, Julia Hartman

32. Binomial Logistic Regression: Selecting a Method of Entry
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:
Click the printer for an important note about printing output with classification plots.
Enter
Forward: LR
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33. Binomial Logistic Regression: Enter Method
Enter is the default method of entering covariates.
Click the OK button to run the procedure.
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34. Binomial Logistic Regression Output Case Processing Summary
The labels and format of your output may be somewhat different.
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35. Binomial Logistic Regression Output Variable Coding
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36. Binomial Logistic Regression Output (Enter Method) Beginning Block: Classification Table
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37. Binomial Logistic Regression Output (Enter Method) Beginning Block: Variables in the Equation
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38. Binomial Logistic Regression Output (Enter Method) Chi-Square Tests of Coefficients
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39. Binomial Logistic Regression Output (Enter Method) Model Summary
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40. Binomial Logistic Regression Output (Enter Method) Hosmer-Lemeshow Contingency Table
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41. Binomial Logistic Regression Output (Enter Method) Classification Table
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42. Binomial Logistic Regression Output (Enter Method) Variables in the Equation
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43. Binomial Logistic Regression Output (Enter Method) Classification Plot
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44. Choose one of the following:
An Interactive Tutorial for SPSS 10.0 for Windows©: Binomial Logistic Regression
Choose one of the following:
Repeat this tutorial
Select the Forward: LR method of entry
Return to the list of tutorials
© Copyright 2000, Julia Hartman
© Copyright 2000, Julia Hartman

45. Binomial Logistic Regression: Forward: 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

46. Binomial Logistic Regression Forward: LR Method
Point to Forward: LR
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47. Binomial Logistic Regression Forward: LR Method
Point to Forward: LR and click.
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48. Binomial Logistic Regression Forward: LR Method
Click the OK button to run the procedure.
© Copyright 2000, Julia Hartman

49. The labels and format of your output may be somewhat different.
Binomial Logistic Regression Output (Forward: LR Method) Case Processing Summary
The labels and format of your output may be somewhat different.
Next
© Copyright 2000, Julia Hartman

50. Binomial Logistic Regression Output (Forward: LR Method) Variable Coding
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51. Binomial Logistic Regression Output (Forward: LR Method) Beginning Block: Classification Table
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52. Binomial Logistic Regression Output (Forward: LR Method) Beginning Block: Variables in the Equation
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53. Binomial Logistic Regression Output (Forward: LR Method) Chi-Square Tests of Coefficients
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54. Binomial Logistic Regression Output (Forward: LR Method) Model Summary
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55. Binomial Logistic Regression Output (Forward: LR Method) Hosmer-Lemeshow Contingency Table
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56. Binomial Logistic Regression Output (Forward: LR Method) Hosmer-Lemeshow Contingency Table
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57. Binomial Logistic Regression Output (Forward: LR Method) Hosmer-Lemeshow Contingency Table
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58. Binomial Logistic Regression Output (Forward: LR Method) Classification Table
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59. Binomial Logistic Regression Output (Forward: LR Method) Variables in the Equation
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60. Binomial Logistic Regression Output (Forward: LR Method) Model if Term Removed
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61. Binomial Logistic Regression Output (Forward: LR Method) Variables not in the Equation
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62. Binomial Logistic Regression Output (Forward: LR Method) Classification Plot for Step 1
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63. Binomial Logistic Regression Output (Forward: LR Method) Classification Plot for Step 2
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64. Binomial Logistic Regression Output (Forward: LR Method) Classification Plot for Step 3
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65. Click one of the following:
An Interactive Tutorial for SPSS 10.0 for Windows©: Binomial Logistic Regression
Click one of the following:
Repeat this tutorial
Select the Enter method of entry
Return to the list of tutorials
© Copyright 2000, Julia Hartman
© Copyright 2000, Julia Hartman

66. Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
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:
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67. Click the classification plot.
Binomial Logistic Regression Output (Forward: LR Method) Printing 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.
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68. Right-clicking opens the shortcut menu.
Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
Right-clicking opens the shortcut menu.
Click SPSS Rtf Document Object.
© Copyright 2000, Julia Hartman

69. Right-clicking opens the shortcut menu.
Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
Right-clicking opens the shortcut menu.
Click SPSS Rtf Document Object.
Then point to Open
© Copyright 2000, Julia Hartman

70. Right-clicking opens the shortcut menu.
Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
Right-clicking opens the shortcut menu.
Point to SPSS Rtf Document Object.
Then point to Open
…and click
© Copyright 2000, Julia Hartman

71. Print the plot from this new window. Click File
Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
Print the plot from this new window.
Click File
This output file has been saved as logistic (enter 3).spo Your window will be different.
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72. Print the plot from this new window.
Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
Print the plot from this new window.
Click File
Then point to Print
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73. Print the plot from this new window.
Binomial Logistic Regression Output (Forward: LR Method) Printing 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!
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74. Close the window. Click File
Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
Close the window.
Click File
© Copyright 2000, Julia Hartman

75. Close the window. Click File Then click
Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
Close the window.
Click File
Then click
Exit & Return to (the file name--in this example) logistic (enter 3).spo
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© Copyright 2000, Julia Hartman

76. Binomial Logistic Regression Output (Forward: LR Method) Printing 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.
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77. Binomial Logistic Regression Output (Forward: LR Method) Printing Logistic Regression Output
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.
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78. Choose one of the following:
An Interactive Tutorial for SPSS 10.0 for Windows©: Binomial Logistic Regression
Choose one of the following:
Resume this tutorial
Repeat this tutorial
Return to the list of tutorials
© Copyright 2000, Julia Hartman
© Copyright 2000, Julia Hartman