title: Evaluation of the impact of an HMO's varicella vaccination program on incidence of varicella.
abstract: The impact of a varicella vaccination program on disease in a large HMO population during 1996-1999 was assessed by multiple cross-sectional analyses of automated database records of vaccinations and varicella diagnoses for children (0-18 years). The cumulative proportion of the population vaccinated reached 73% among 2-year-olds, and 22% overall. An overall 49.7% reduction in varicella incidence was estimated to be attributable to an 18.5% point increase in the proportion of the population vaccinated.
authors.affiliation: Center for Health Research, Kaiser Permanente Northwest, 3800 N. Interstate Avenue, Portland, OR 97227-1098, USA. john.mullooly@kpchr.org
authors.forename: John P
authors.initials: JP
authors.lastname: Mullooly
authors.forename: Julie E
authors.initials: JE
authors.lastname: Maher
authors.forename: Lois
authors.initials: L
authors.lastname: Drew
authors.forename: Roberleigh
authors.initials: R
authors.lastname: Schuler
authors.forename: Weiming
authors.initials: W
authors.lastname: Hu
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002644:Chickenpox / Q000453:epidemiology / Q000276:immunology* / Q000517:prevention & control*; D019433:Chickenpox Vaccine; D002648:Child; D002675:Child, Preschool; D003627:Data Interpretation, Statistical; D016208:Databases, Factual; D005260:Female; D006279:Health Maintenance Organizations / Q000191:economics / Q000706:statistics & numerical data*; D006801:Humans; D017589:Immunization Programs / Q000191:economics; D007223:Infant; D008297:Male; D009922:Oregon / Q000453:epidemiology; D011153:Population; D012621:Seasons
chemical_list: D019433:Chickenpox Vaccine