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Had CAT scan in past 12 months

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For sample adults age 40 years and older, CAT1YR indicates whether the respondent had a CAT or CT scan in the last twelve months. Interviewers explained, "During this test, you are lying down and moved through a donut shaped x-ray machine while holding your breath."

Those with an affirmative response in CAT1YR were asked whether the CAT scan had been done of their chest area (CCAT1YR) and, if so, whether the purpose of the test was to check for lung cancer (CCAT1YRYCAN).

Purpose of Inquiry about Cancer Testing 

CAT1YR was first included in the NHIS in 2010 as part of the Sample Adult Cancer Screening section.

According to the 2010 Field Representative's Manual, this and related questions about cancer screening were asked:

to determine the practices and knowledge of the public with regard to cancer screening practices. This includes practices that are known to reduce mortality from cancer and some for which evidence of effectiveness is not available. The 2010 Cancer Screening Supplement will be the first time questions about having a breast MRI, virtual colonoscopy, and lung x-ray are in the NHIS.

The Manual also provided the following statement regarding how the data from the Cancer Screening questions would be used:

It also allows for comparisons among subgroups of the population to examine factors that may influence ... cancer screening exam practices. Together, this information will be useful in developing public health and health services programs to increase ... the use of regular and effective screening.


There are no comparability problems for CAT1YR.


  • 2010: Sample adults age 40+.


  • 2010