[R] comparison of two logistic regression models

[Anna-Maria Tyriseva]

Dear list members!

Could you help me?
I would like to compare two models: a) logistic regression model, 3 
factors as independents b) logistic regression model, 3 factors and one 
random effect as independents (function glmmPQL). AIC are not available 
with PQL and model comparison using ANOVA is not possible. What should I do?

Thanks in advance.
Anna-Maria