I can personally confirm that I used to have a strong correlation between skipping breakfast and obesity. Back when I used to eat a big pizza at 11 pm followed

I can personally confirm that I used to have a strong correlation between skipping breakfast and obesity. Back when I used to eat a big pizza at 11 pm followed by some beer I could never eat the next morning because I was still full, so I skipped breakfast and didn't eat until lunchtime. However, the skipped breakfast was not the cause of my overweight, but simply the result of eating far too much in the evening. So maybe there actually is a correlation, but as always: Correlation does not imply causation.