# Tests for the equality of survival functions

Tests for the equality of survival functions and their properties and assumptions.

Test | Purpose |
---|---|

Log-rank | Test if the survival functions are equal (uses equal weights). The most popular test. Equivalent to the Mantel-Haenszel test of the hypothesis that the stratum specific odds-ratio is equal to one. |

Wilcoxon |
Test if the survival functions are equal with more weight on differences between the survival functions at smaller values of time (higher weights on early death). This test is appropriate when hazard functions vary in ways other than proportionally and when censoring patterns are similar across groups. |

Tarone-Ware |
Test if the survival functions are equal using weights equal to the sqrt(number at risk) rather than the number at risk used in Wilcoxon. Like the Wilcoxon test, it gives larger weights (although not as large) to earlier failure times. Although less susceptible to the censoring pattern in the data than Wilcoxon’s test, this could remain a problem if large differences in these patterns exist between groups. |

Fleming-Harrington |
Test if the survival functions are equal using weights km |

- What is Analyse-it?
- What's new?
- Administrator's Guide
- User's Guide
- Statistical Reference Guide
- Distribution
- Compare groups
- Compare pairs
- Contingency tables
- Correlation and association
- Principal component analysis (PCA)
- Factor analysis (FA)
- Item reliability
- Fit model
- Method comparison / Agreement
- Measurement systems analysis (MSA)
- Reference interval
- Diagnostic performance
- 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
- Control charts
- Process capability
- Pareto analysis
- Study Designs
- Bibliography

Version 6.10

Published 21-Jul-2022