.- Help on far5 A. Babiker 18/11/96 .- Floating absolute risk for Cox and Conditional logit regression v5.0 Command line: ^far5^ depvar factor [^if^ exp] [^in^ range] [, ^cov^ars^(^varlist^)^ ^cm^d^(^command^) de^ad^(^var^) rat^es ^gr^oup^(^var^) ef^orm other ^cox^ or ^clogit^ options] ^factor^ = the categorical variable with k>2 levels for which floating absolute risks are to be calulated ^cmd(str)^ = regression command (cox or clogit) ^covars(str)^ = covariates to be fitted in addtion to ^factor^ ^rates^ = use overall crude rate to estimate floating adjusted rates. (Allowed with ^cox^) Results can be redisplayed by entering the command. ^ef^orm displays results in terms of odds ratio for clogit or hazard ratio for cox without ^ra^tes option. With ^ra^tes option in ^cox^ results are displayed in terms of log absolute hazard (`noef^orm) or absolute hazard (^ef^orm). Examples - -------- . ^far5 time stage, dead(d) ef^ . ^far5 time stage, dead(d) rates^ . ^far5 time stage, cmd(clogit) group(centre) ^ . ^far5, level(99) ef^ [redisplay using odds ratio and 99% conf limits] Also see - -------- Manual: [5s] clogit, cox Reference - --------- Easton DF, Peto J and Babiker AG, "Floating absolute risk: An alternative to relative risk in survival and case-control analysis avoiding an arbitrary reference group", Stats in Med, 10(1991), 1025-1035. Abdel G. Babiker MRC HIV Clinical Trials Centre University College London Medical School Mortimer Market Centre London WC1E 6AU UK