title: Population Effects of Influenza A(H1N1) Pandemic among Health Plan Members, San Diego, California, USA, October-December 2009.
abstract: Lacking population-specific data, activity of seasonal and pandemic influenza is usually tracked by counting the number of diagnoses and visits to medical facilities above a baseline. This type of data does not address the delivery of services in a specific population. To provide population-specific data, this retrospective study of patients with influenza-like illness, influenza, and pneumonia among members of a Kaiser Permanente health plan in San Diego, California, USA, during October-December 2009 was initiated. Population data included the number of outpatients accessing healthcare; the number of patients diagnosed with pneumonia; antimicrobial therapy administered; number of patients hospitalized with influenza, influenza-like illness, or pneumonia; level of care provided; and number of patients requiring specialized treatments (e.g., oxygen, ventilation, vasopressors). The rate of admissions specific to weeks and predictions of 2 epidemiologic models shows the strengths and weaknesses of those tools. Data collected in this study may improve planning for influenza pandemics.
authors.forename: Roger A
authors.initials: RA
authors.lastname: Bitar
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000553:Ambulatory Care; D000998:Antiviral Agents / Q000627:therapeutic use; D002140:California / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003428:Cross Infection / Q000453:epidemiology / Q000821:virology; D005260:Female; D006282:Health Personnel; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000188:drug therapy / Q000453:epidemiology* / Q000821:virology*; D007297:Inpatients; D008297:Male; D008875:Middle Aged; D012621:Seasons; D055815:Young Adult
chemical_list: D000998:Antiviral Agents
keywords: 2009; H1N1; Influenza A virus; ambulatory care; anti-infective agents; antimicrobial; antiviral; health planning; healthcare delivery; hospitalization; influenza A(H1N1)pdm09; inpatients; intensive care units; oseltamivir; pandemic; pandemics; pdm2009; pneumonia; population dynamics; population-based planning; positive pressure respiration; telemetry; vasoconstrictor; ventilation; viruses
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