I'm not contesting that it's possible to have a causative relationship - just saying that there's bound to be a lot of "false positives" in the population they're studying. In other words, a correlation between apnea and GERD could very well exist in a vacuum, but it doesn't sound like there was any...

That article makes a casual mention of weight as a factor, but not nearly enough. The population of people who are overweight that present with apnea is WAY higher than the population of people at a healthy weight- same story with GERD. It's like saying OSA causes back pain because a lot of (overwei...