Skip to content
National Cancer Institute National Cancer Institute U.S. National Institutes of Health www.cancer.gov
Division of Cancer Prevention logo
Home Site Map Contact DCP
Programs & Resources

Biometry Research Group

Statistical Software

Cox Regression for Survey Data

(Written by Doug Midthune)

This IBM PC program fits Cox's proportional hazards model to sample survey data, allowing for time-dependent covariates and left-truncated data (subjects entering at time >0). Since the program allows left-truncated data, age can be modeled as the time variable as described in Korn EL, Graubard BI, Midthune D (1997), Am J Epidemiology, 145, pp. 72-80.

For complex sampling designs, the program maximizes a weighted partial log-likelihood and calculates robust design-based standard errors (assuming with-replacement sampling at the first stage). For further details see Binder, DA (1992), Biometrika, 79, pp. 139-47.

For simple random sampling, the method reduces to the standard (unweighted) partial log-likelihood analysis.

The program uses Breslow's method for handling tied event times.

Download

  • coxreg.zip (m, 367kb) - Zip file containing PC program, documentation and example.