I wonder if the study factored in the fact that Catholics can also get annulments, which are not the same thing as divorces and would not be counted as such. No other denomination does annulments to my knowledge.
Would it really have needed to? I daresay most Catholics who get annulments do so because they’re already divorced and want to get married again in the Catholic Church.
Those are two separate things, Secret Agent Man. Annulments, actually Certificates of Nullity, refer to the Catholic marriage, which is one of the seven Sacraments. A Certificate of Nullity is given when a diocesan Tribunal determines, for various reasons, that the conditions for the marriage being sacramental did not occur. This applies in the Church, does not change legal status outside the Church. Divorce/dissolution are changes in legal status, but not recognized as such within the Church without a judgement of the type I described above. And, not trying to be too picky, strictly speaking, the Catholic Church isn’t a denomination(”of the name”). You are correct that none of the denominations (i.e. protestants, et al) have marriage as a sacrament in the same way, as far as I humbly know.
I may be wrong but I believe in order to petition for an annulment in the Catholic Church one must already be civilly divorced.