Alternative Hypothesis (and there are many): People of a lower-socioeconomic demographic both have greater chances of a poor upbringing as well as poor health as they get older.
Lot of confounding variables you need to correct for here.
Lot of confounding variables you need to correct for here.
It's true that there are a lot of variables when asking broad questions like what causes poor health, but it seems like the majority of the participants weren't of a lower-socioeconomic demographic, as indicated in the article.
84% where white.
59% of Americans identify as middle class, upper-middle or upperclass. So saying that the study used mostly upper- and middle-class doesn't really tell us anything.
I remain unconvinced that "Family Secrets Make You Sick" based on that article. There are a lot of ways to determine whether that might be the case, but I'm surprised, based on the article's description, that they were able to get a paper published with their method.