New research shows that more than 40 percent of children in families earning between $38,000 and $77,000 annually who are uninsured for a year see no physicians and have no prescriptions during that time. For uninsured children in families earning less than that, the percentage is as high as 55 percent. The percentages taper off but don't fall below 42 percent until the $78,629-and-above bracket, when they drop to 30 percent, according to the researchers at the University of Rochester Medical Center.