Methodology Application Document: Logistic Regression Using the CODES Data (TheCrash Outcome Data Evaluation System)

摘要

This document was written to aid statistical analysts in NCSA who requiredinstuction in Logistic Regression, a method for analyzing data with a binary outcome variable and several covariates. It gives some background in Chi-Square analysis and simple linear regression, and then introduces the differences between odds, odds ratios and logits on one hand, and, probabilities, relative risk, and effectiveness on the other. It then gives three examples of logistic regression, progressively more complex, with numerous explanatory comments.