Yeah, lots of risk for confounders and selection bias in a study like this. If you take the huge number of patients with a history of GI bleeding (for which PPI therapy is well-proven), those are patients who already…
Yeah, lots of risk for confounders and selection bias in a study like this. If you take the huge number of patients with a history of GI bleeding (for which PPI therapy is well-proven), those are patients who already…