and second hand smoking.A cross-sectional study of the baseline data from a randomized controlled trial to report back intervention on exposure to radon and SHS in home was done. Homeowners were randomly selected and assigned to two groups, treatment (TRT) and control (CTL) groups. They were provided test kits and were asked to report back.The variables used were age, sex, race etc. and using categorical and nominal variables. Education was measured with an 8-item ordinal variable. Since this was a randomized trial it intended to eliminate any biases that could influence the study and thus jeopardize the results.Some of the results showed, that out of the 562 participants, 56% tested for radon, 49% tested forSHS and 48% tested for both (Butler, K. M., 2018). People who were educated and were having a college degree or more were found to be most likely to test for both radon and SHS (p = .002) It was also found that primary cause of lung cancer is higher with people with income below poverty line.The sampling method being random, did not eliminate all possible biases. This study was done ata university medical center, which may result in selection bias.Reference:Butler, K. M. (2018). Access to Free Home Test Kits for Radon and Secondhand Smoke to Reduce Environmental Risks for Lung Cancer. Journal of Environmental Health, 81(3), E1–E6.
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