SigmaAnalytics & Tech
E4SPSSIntermediateAbout 40 min to complete

Binary logistic regression

Why a yes/no outcome breaks linear regression.

Slides · Dataset

About 40 minutes to complete

Enrol to open the slides and download the data.

What this module covers

why a yes/no outcome breaks linear regression; odds, odds ratios and the log odds, explained with arithmetic rather than assertion; coding the outcome so the odds ratio points the right way; the menu path including Categorical and Options; reading the output - omnibus test, Nagelkerke R-squared, Hosmer-Lemeshow, the classification table, and the variables in the equation; interpreting Exp(B) and its confidence interval in a sentence; adjusted vs unadjusted odds ratios; events-per-variable and how many predictors your sample can carry; APA reporting and the OR table.

The dataset

Antenatal care and birth outcome — Sigma teaching dataset

A teaching dataset of 300 cases, generated from a fixed seed so every figure in the module reproduces exactly.

  • CodebookIncluded
  • Dataset (CSV)Included
  • Dataset (CSV)Included
  • SPSS syntaxIncluded