Here is a free link to the paper if you don't have access:: onlinelibrary.wiley.com/share/author...

I also wrote a more detailed thread when I posted the preprint last year. Check it out here if you are interested: bsky.app/profile/hfsu...

Accompanying the paper is an interactive web page with figures and tables showing the prevalence of psychological codes in the ICPC-2 by age, sex, and parental income quartile. Check it out here:
hfsu.shinyapps.io/prevalence_b...

3/7
🎓 Educational attainment also independently predicted better mental health.
But the highest risk was for men who were low in both cognition and education.
This group faced the highest probability of adult psychiatric diagnoses.

I will write a detailed thread next week. If something is confusing until then, I highly recommend the supplementary notes, where I go through the logic more slowly and in greater depth.

Results imply that partners are strongly assorting (r=.68) on education-associated trait(s) with large shared-environmental effects (i.e. Social Homogamy). Accounting for this in intergenerational models reveals previously hidden or underestimated environmental effects.

(10/10) A big thank you to my excellent co-authors! @hfsunde.bsky.social, @rosacheesman.bsky.social, Nikolai Eftedal, Matthew C. Keller, @eivindy.bsky.social, and Espen M. Eilertsen

(9/10) Several reasons besides direct assortment can explain partner similarities. In this paper, we cannot determine which processes are most important. However, we can distinguish between these in future research.

(8/10) Could health similarities be by-products of partner choice based on education? To some extent—partner correlations in health were reduced by 30–40% after accounting for educational attainment in adulthood or school grades at age 16.

(7/10) Do mental health and education determine partner choice? Many studies assume so-called direct assortment. If direct assortment fully explains partner choice, it would be easy to predict correlations between siblings-in-law. But they are much more similar than expected under direct assortment.

(6/10) This means that children with a mental disorder are more likely to have another parent with a mental disorder or with low education. This matters for the distribution of both genetic and environmental risk factors among children.