search for: lesnew3

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2007 Jun 05
1
lme vs. SAS proc mixed. Point estimates and SEs are the same, DFs are different
...ept 113.48 7.4539 25 15.22 <.0001 jweek -1.7164 0.5153 24 -3.33 0.0028 Type 3 Tests of Fixed Effects Num Den Effect DF DF F Value Pr > F jweek 1 24 11.09 0.0028 R code: LesNew3 <- groupedData(LDL~jweek | Patient, data=as.data.frame(LesData3), FUN=mean) fit3 <- lme(LDL~jweek, data=LesNew3[LesNew3[,"lastvisit"]>=4,], random=~1+jweek) summary(fit3) R output: Random effects: Formula: ~1 + jweek | Patient Structure: General positive-definite, Log-Chol...