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Member Health Survey

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2014-15 Kaiser Permanente Adult Member Health Survey Report for the Northern California Region Membership

The region reports profile the adult Health Plan membership aged 20 and over in the Northern California region, based on self-reported data collected through mailed surveys of random samples of adult Health Plan members from 19 medical center service populations in spring 2014.

2014 Northern California Region Report

Sociodemographic and Health-Related Characteristics of Members Aged 65 and Over in Kaiser Permanente's Northern California Region, 2014 


For the 2014 survey cycle, data collection has been split over two years (2014-2015), with independent samples of 22,000 Kaiser Permanente Northern California health plan members aged 20 and over surveyed in each year. The survey sample in both years was comprised of approximately equal numbers of adults from each of our 19 largest medical center service populations (MCSPs), with each MCSP sample stratified by sex and five age groups (20-44, 45-64, 65-74, 75-79, and 80+). Members whose preferred spoken or written language was indicated in health plan records as other than English were excluded from the sampling process. A separate Spanish language survey is being conducted in 2016.

To address oversampling and nonresponse issues, all survey respondents are assigned weighting factors to use for analyses meant to generalize to the actual age, sex, and geographic composition of the adult membership rather than that of the respondent sample. After the 2015 survey is completed, the 2014 and 2015 data will be pooled and respondent weighting factors will be created for the combined dataset.

The survey questionnaire could be completed using a print or online questionnaire. Everyone in the sample was sent up to three complete survey packets over a five-month period, beginning in mid-May 2014 and ending in September 2014. A URL for the online survey was provided in the letter and on the questionnaire, and eligible members who had an email address registered with the website were also sent an email containing a link to the online survey. For the third mailing, shorter versions of the questionnaires were used. The same procedure was used in 2015, except more members were considered eligible to receive the emailed link. In both years, most members chose to complete the print questionnaire.

The overall survey response rate for the 2014 survey after three mailings was 38.0 percent. Response varied by age group and sex: 24.1 percent for ages 20-44 (31.0 percent for women, 17.8 percent for men), 38.6 percent for ages 45-64 (44.4 percent for women, 33.6 percent for men), and 64.8 percent for ages 65 and over (64.5 percent of women and 65.2 percent of men). These response rates are slightly lower than those for the 2011 survey.

Contact us

Check here for announcements of new reports that have been posted to the website. For more information about timing and topics or to make special requests for statistics based on the 2011 survey, contact Nancy Gordon, Member Health Survey director, at: