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Research – Survey

The Public Health Institute offers specialized support for public health-related surveys, and currently conducts a number of surveys for public (federal, state, and county) and private sector clients in California and nationwide. Our experts are experienced in survey instrument design, data collection, data analysis, multi-lingual capacity, information products, and commitment to client service sets. Our research staff has advanced training in public health and sociology; content areas of expertise include obesity, nutrition, physical activity, reproductive health, social determinants of health, health behaviors, and mental health. Staff also has expertise in statistics, including the creation of weights and analyzing survey data in SPSS, SAS and other statistical software packages. We excel in conducting mixed methods research, utilizing key informant interviews, executive interviews, focus groups, and cognitive testing to inform and complement quantitative research endeavors.

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New PHI Study on Breakthrough Infection Shows Steep Vaccine Efficacy Decline Over Six Months

A PHI study in the journal Science analyzed COVID infection by vaccination status among 780,225 Veterans. Researchers found that protection against any COVID-19 infection declined for all vaccine types, with overall vaccine protection declining from 87.9% in February to 48.1% by October 2021.

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