Predictors of Pneumococcal Vaccination, Pneumococcal Vaccine Effectiveness, and Trends in Pneumonia

The three objectives of this study are to: 1) Identify and compare the clinical, demographic and neighborhood characteristics associated with receipt of pneumococcal vaccine among persons 65 years of age and older, and among persons 18 to 64 years of age with risk conditions (at-risk and high-risk); 2) Estimate the effectiveness of 13-valent pneumococcal conjugate vaccine (PCV13) and 23-valent pneumococcal polysaccharide vaccine (PPSV23) in preventing health care utilization for invasive pneumococcal disease, lower respiratory tract infections, and all-cause pneumonia in persons 18 to 64 years of age and in persons 65 years of age and older; and 3) Identify cases of all-cause pneumonia and lower respiratory tract infections , and describe trends in the incidence of health care services utilization under different definitions in persons 18 to 64 years of age with risk conditions (at-risk and high-risk) and in persons 65 years of age and older in the Kaiser Permanente Northern California population.

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