Using survfit I can get the '1 year' Survival from this dataset which holds survival in days:
require (survival) survfit( Surv(time, status) ~sex, data=colon) summary (fit, 365) My current real world data I'm calculating time using lubridate to calculate time and since it made the axis easy I just told it to do and so my "time" appears to be a float in months. time <- time_length(interval(startDate, endDate), "months") Is there a "right" approach to this (as in a convention). If I use 12months as a year and describe it in the write up as 12, 24 and 36 month survival rather than 1, 2 and 3 year presumably that is OK.. I've been asked to report 30, 60 & 90day. Then 6month, 1, 2 and 3 year survival. Should I calculate time 3 times, (interval day, month and year) and run the survival on each to get the requested outputs or would people just provide something close. Should I run a campaign to decimilise time? Sent from Nine<http://www.9folders.com/> ******************************************************************************************************************** This message may contain confidential information. If you are not the intended recipient please inform the sender that you have received the message in error before deleting it. Please do not disclose, copy or distribute information in this e-mail or take any action in relation to its contents. To do so is strictly prohibited and may be unlawful. Thank you for your co-operation. NHSmail is the secure email and directory service available for all NHS staff in England and Scotland. NHSmail is approved for exchanging patient data and other sensitive information with NHSmail and other accredited email services. For more information and to find out how you can switch, https://portal.nhs.net/help/joiningnhsmail [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
