Wikipedia has relatively recent sources, 2017.

https://www.sciencedirect.com/science/article/abs/pii/S01650...

> Additionally, prevalence was significantly higher in women from low and middle income countries compared to women from high income countries (OR 1.8, 95% CI 1.4–2.2). The overall pooled prevalence was 11.9% of women during the perinatal period (95% CI 11.4–12.5).

https://en.wikipedia.org/wiki/Postpartum_depression#Epidemio...

Are we assuming that low and middle income countries still live in villages?

For example, in Malaysia, most people no longer live in villages but it's counted as a middle income country.

I suppose I don't know which countries are more or less alienated from their extended families, but the US is surely more than averagely sprawled since it's so large and so suburbanized.

You know by “village” they don’t mean a literal village right? It’s a metaphor.