Percent up-to-date for non-PCV recommended vaccines at 13 months. Children were grouped by the month and year of their birth. Note: Data between April – October 1998 were considered incomplete in Group D due to a potential disruption in their immunization information system during the pre-PCV baseline period.
Lin et al. BMC Pediatrics 2005 5:43 doi:10.1186/1471-2431-5-43