https://communities.sas.com/t5/Statistical-Procedures/Proc-phreg/m-p/522951#M26521 <P>Your last group still has 4 cases... Its frequency is not zero but&nbsp; rounded to 0 by excel</P> Thu, 20 Dec 2018 20:37:22 GMT WillZh 2018-12-20T20:37:22Z https://communities.sas.com/t5/Statistical-Procedures/Proc-phreg/m-p/521838#M26503 <P>&nbsp;</P><P><SPAN>I am using phreg to analyze the my data.<BR />However, the control frequency of the last group among the four groups is '0'.<BR />However, the hazard ratio is calculated in the phreg<BR />I do not know why the hazard ratio is calculated for any reason.</SPAN></P><P><SPAN>I try to write a paper using this result.<BR />I do not know what to do.</SPAN></P> Mon, 17 Dec 2018 02:04:31 GMT https://communities.sas.com/t5/Statistical-Procedures/Proc-phreg/m-p/521838#M26503 LEESK 2018-12-17T02:04:31Z https://communities.sas.com/t5/Statistical-Procedures/Proc-phreg/m-p/522951#M26521 <P>Your last group still has 4 cases... Its frequency is not zero but&nbsp; rounded to 0 by excel</P> Thu, 20 Dec 2018 20:37:22 GMT https://communities.sas.com/t5/Statistical-Procedures/Proc-phreg/m-p/522951#M26521 WillZh 2018-12-20T20:37:22Z