Key points are not available for this paper at this time.
Clifford C. Clogg, Scott R. Eliason, A Flexible Procedure for Adjusting Rates and Proportions, Including Statistical Methods for Group Comparisons, American Sociological Review, Vol. 53, No. 2 (Apr., 1988), pp. 267-283
Clogg et al. (Fri,) studied this question.