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Statistical Reference Guide
Survival/Reliability
Proportional hazards fit
Estimating hazard ratios
Estimate the hazard ratios using a proportional hazards model.
Ensure you have followed the steps in
Fitting a proportional hazard model
.
Activate the analysis report worksheet.
On the
Analyse-it
ribbon tab,
in the
Fit Model
group, click
Hazard Ratios
.
The analysis task pane
Hazard Ratios
panel opens.
In the
Hazard Ratios
grid, in the
Comparison
column.: For a continuous variable, type the change in units of the predictor for the hazard ratio, the default is for 1 unit change in the predictor, but for some predictors the odds ratio for a 10 or 100 unit change in the predictor maybe more interpretable. For a categorical variable, select the type of comparison:
Option
Description
All pairs
Compare all pairs of categories against each other. For example, with 3 categories the comparisons, are 1v2,1v3,2v1,2v3,3v1,3v2.
All distinct pairs
Compare all unique pairs of categories against each other. For example, with 3 categories the comparisons as 2v1,3v1,3v2).
Against reference
Compare all categories against the reference category (the first category in the categorical variable). For example, with 3 categories the comparisons are 3v1, 2v1.
If the model has interaction terms, in the
At
column for each continuous variable involved in an interaction, type the levels of interest as a comma (or your list delimiter) separated list. For example, if Age is a variable involved in an interaction with Gender, you may use 16, 25, 30, 40, and 60 as the levels of interest at which the Gender Female/Male hazard ratios will be computed. For a continuous variable involved in an interaction with a categorical variable, the unit change for each level of the categorical variable will be computed. For example, if the Age unit is 10 years and Age is involved in an interaction with Gender, the hazard ratio for a change of 10 years will be computed for Females and Males.
In the
Confidence interval
edit box, type the confidence level.
Click
Recalculate
.
Related concepts
Hazard ratio estimates
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Statistical Reference Guide
Distribution
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Survival/Reliability
Kaplan-Meier survival function
Plotting a Kaplan-Meier survival curve
Equality of survival functions test
Tests for the equality of survival functions
Comparing two or more survival functions
Proportional hazards fit
Fitting a proportional hazard model
Hazard ratio estimates
Estimating hazard ratios
Baseline survival function
Effect of model hypothesis test
Effect of term hypothesis test
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Pareto analysis
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Bibliography
Version 6.15
Published 18-Apr-2023
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