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ipdmeta (version 1.1)

cancer.rats: Rats data for frailty modeling

Description

50 litters of rats were exposed to a carcinogen and observed for time to tumor occurrence.

Arguments

format

ll{ litter Number rx Exposure indicator (Carcinogen = 1, Control = 0) time Tumor occurrence (Days) event Indicator if tumor observed (1 = event, 0 = censored) }

References

Mantel, N., Bohidar, N. R., and Ciminera, J. L. (1977), "Mantel-Haenszel analyses of litter-matched time-to-response data, with modifications for recovery of interlitter information," Cancer Research, 37, 3863-8.