A plunge in U.S. preschool obesity? Not so fast, experts say: News that obesity rates dropped 43% in American preschoolers is raising eyebrows. “When the study was published in late February in the Journal of the American Medical Association, no one had a ready explanation for that astounding finding by researchers at the U.S. Centers for Disease Control and Prevention.” As specialists take a closer look at the study’s data, some are saying that it may be a “statistical fluke” given that other studies have not shown a similar decline. Though the study’s information came from the well-respected National Health and Nutrition Examination Survey, some experts are saying that “no evidence of the kinds of major shifts in the behavior among preschoolers aged 2 to 5 exists which would explain a 43 percent drop in their obesity rates.”