proc genmod data= ;
repeated subject= / corr= type= ;
lsmeans x / diff=control ('ref') cl adjust=Dunnett(or tukey);
Parameters estimated with maximum likelihood methods. This is an iterative process, i.e., the computer adjusts the parameter until the log likelihood function is maximised.
|normal||identity||continuous dependent variable, mean difference|
|binomial||log||risk ratio from exponentiation of the parameter estimate|
|poisson||log||risk ratio from exponentiation of the parameter estimate; used for robust error estimate with repeated subject statement|
|multinominal||categorical response variable with more than two levels|
|Sums of squares||Effect type||Note|
|Type I||Sequential||The SS for each factor is the incremental improvement in the error SS as each factor|
effect is added to the model. In other words it is the effect as the factor were
considered one at a time into the model, in the order they are entered in the model
|Type II||Hierarchical or partially sequential||The SS for each factor is the reduction in residual error obtained by adding that term to a model consisting of all other terms that do not contain the term in question.|
|Type III||Marginal||The effect of each variable is evaluated after all other factors have been accounted for.|
Repeated statement: specifies the covariance structure of multivariate responses and iterative fitting algorithm for GEE model fitting.