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Intraclass Correlationb 95% Confidence Interval F Test with True Value 0 This violates reliability model assumptions. 005Ī The value is negative due to a negative average covariance among items. Missing Value Handling Definition of Missing User-defined missing values are treated as missing.Ĭases Used Statistics are based on all cases with valid data for all variables in the procedure.Ī Listwise deletion based on all variables in the procedure.
STATA MP 14 MANUAL PDF CODE
So, suggestions welcome (and help with translating the SPSS code above particularly welcome)Īdded in edit: each patient is given this scale on admission to the facility I have over 800 facilities and over 600k patients I do not know who collected the data but all collectors are, allegedly, trained in the use of the scale (in case this helps anyone figure out what "target" and "rater" are) I have looked at the -icc- command but the language on "target" and "rater" is confusing to me (not my area) and my attempts give a very low icc (<.2) which I don't believe to be even close to accurate I have seen Chuck Huber's user's group paper from 2012 but he uses the Spearman-Brown Prophesy formula and I would like to get an ICC if possible Here, in the statistics options, I checked the box for "intraclass correlationĬoefficient", and I chose the "two-way mixed method" in the model choice, and
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ICC=MODEL(MIXED) TYPE(CONSISTENCY) CIN=95 TESTVAL=0. This is from choosing "scale" and "reliability analysis" A client previously calculated split-half reliability using SPSS and I would like, if possible, to "match" their results in Stata the scale I am investigating has 17 elements, each scored from 1 to 6 the client provided the following description of what they did in SPSS (in case that helps anyone) they were investigating a different scale: