IID-12.8 Data Details

Data are from the population residing in long-term care facilities or nursing homes certified by the Centers for Medicare and Medicaid Services. These data represent a census of all residents of CMS-certified nursing homes during the influenza season of interest.

Data include residents of CMS-certified nursing homes who had at least one assessment with a target date between October 1 and March 31. Residents have an average of 5 assessments per year. Percentage includes U.S. resident nursing home population (i.e., not adjusted for state or facility). Residents who lived in multiple states during a single year were included once in each state they lived in.

Vaccination status is ascertained by the staff member completing the resident assessment instrument based on medical records when available, self-report by the resident, or report from a resident’s care taker. Residents were considered vaccinated based on a “yes” response to the question “Did the resident receive the influenza vaccine in this facility for this year's influenza season?” or, if not, if the reason stated for not receiving vaccination was because the vaccination was received outside of the facility. Residents were considered vaccinated if they were ever reported to be vaccinated for the current influenza season at any assessment conducted from October 1 through June 30 of each influenza season.

Prior to the 2010-11 influenza season, Native Hawaiians and other Pacific Islanders are included in the Asian race/ethnicity estimates.