If there are no patients with a diagnosis code in the control groups, odds ratio is not calculated (i.e. N/A). Kawasaki vs. influenza yields no significant associations not already found in Kawasaki v
Sizes represent approximate sizes as of 2012; many sites are still actively recruiting. NLP = Natural Language Processing. Sites joined with 1eMERGE-I in 2007, 2eMERGE-II in 2011, or as 3pediatric sit