Ah Newish thanks for that, it gives us the opportunity to see how to evaluate research.
To start off this article is in The Linacre Quarterly, a peer reviewed journal, which is a good point, of the Catholic Medical Association. A religious medical association should ring alarm bells and indeed this is the journal that brought us such gems as "Use of aborted fetal tissue in vaccines and medical research obscures the value of all human life", so all in all a promising start.
Onto the paper itself. It starts off with various worrying statistics on the rise of divorced and unmarried parents which are not really relevant to the conclusion, but should put you in a nice state of dread which is to follow.
It then merely mentions and dismisses one review of the literature that makes the opposite point (Mooney, Olive and Smith 2009), i.e. that there is no difference in long term outcomes for children from intact and non-intact families, in favour of two that support its conclusion.
Now let's stop here and consider the rejected review. What does it actually say? It says that "...high levels of parental conflict, the quality of parenting and of parent-child relationships, poor maternal mental health and financial hardship interact in complex ways before, during and after parental separation, and impact on child outcomes." p.3. A rather nuanced conclusion that suggests more than anything else that there are multiple factors that affect children's wellbeing rather than an intact is fine, non-intact is damaged dialectic. This study is also a meta review of reviews of research in multiple countries.
However this meta review is rejected in favour of the results of Amato and Keith 1991 and who knows which one exactly because the references become muddled. Everything comes from an Amato 2001 reference which is an update of earlier Amato and Booth 1997 and Amato and Keith 1991, so not multiple studies but one updated one. Let's look at the 1991 original. 92 studies in the original plus 67 in the update all from the 1990s.
Alarm bells should be ringing here because the rejected meta-study is larger, more current and includes the Amato studies, but it is still rejected, for no reason, in favour of Amato.
Even if we focus on Amato, his conclusions are that family functioning NOT family structure has a greater influence on the wellbeign of children. So conflict is the problem not married status. This point, made by Amato repeatedly is oddly missed out by the authors.
So what does happen to children of divorced parents according to your study?
Apparently the child may lose time with each parent, but there isn't a single study accounting for this despite the techinical language invented by the authors to describe this worrying phenomenon: apparently divorced parents experience 'a moratorium on parenting' as they lack the emotional strength to deal with their children.
Also the child may lose his/or her religious faith and practice.
OK I admit that here I gave up the will to live.