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lesnet
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...