Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!rutgers!mailrus!uwm.edu!psuvax1!psuvm!CARDIO!TED From: ted@CARDIO.UCSF.EDU (Ted Venet) Newsgroups: bit.listserv.sas-l Subject: Inter-Rater/Inter-Time Reliability Message-ID: <9002062252.AA07610@cardio.ucsf.EDU> Date: 6 Feb 90 12:46:57 GMT Sender: "SAS(r) Discussion" Reply-To: Ted Venet Lines: 26 Approved: NETNEWS@PSUVM Gateway X-Mailer: ELM [version 2.2 PL16 mips 1] Comments: cc: epid-l@mcgill.BITNET hELlo out therE: I (not really) sure this issue has bee thrashed through in previous correspondences (but if it is I don't know where it went to) so my apologies for raising it this time around. Suppose there is some clinical phenomenon of interest and one wants to acquire some index of its reliablility - both with respect ot the individual making the observation on the patient and the temporal stability of the observation without respect to the identity of the observer. Any ideas how this might be tackled. Some questions come to mind: 1 - how many observations/case would be needed; how many cases would be needed. (Which is more important? Is it better somehow to go with more than two observations per patient (each made twice by each observer)? 2 - has anyone seen any SAS code that could help. Thanks in advance, Ted Venet UCSF School of Medicine