*! version 1.1 2021-08-23 Mark Chatfield program power_cmd_tworates_zhu_init, sclass version 15 sreturn clear sreturn local pss_numopts "r1 OVERDISPersion irr DURation VARMethod" sreturn local pss_allcolnames "alpha power N N1 N2 nratio r1 r2 IRR overdispersion duration varmethod delta" sreturn local pss_alltabcolnames "alpha power N N1 N2 IRR r1 r2 duration overdispersion" sreturn local pss_delta "IRR" *above helpful for graphs sreturn local pss_titletest " for the comparison of rates using negative binomial regression" sreturn local pss_samples "twosample" end