The Dermatology questionnaire section (DEQ) provides personal interview knowledge on sun exposure and sun protecting behavior.
The target cluster for this questionnaire section is participants aged 20-fifty nine years.
Interview Setting and Mode of Administration
This questionnaire was exhausted the house, employing a Computer-Assisted Personal Interviewing-CAPI (interviewer administered) system.
Quality Assurance & Quality Control
The CAPI system is programmed with designed-in consistency checks to reduce knowledge entry errors. CAPI also uses on-line facilitate screens to help interviewers in defining key terms used in the questionnaire.
Data Processing and Editing
Frequency counts were verified throughout the preparation of the file.
Data collection for the 2007-08 dermatology questionnaire failed to begin at the beginning of the year 2007. Due to sample size and other disclosure considerations, 2007-08 information for this part are not on the market publically.
Queries on carrying a hat when within the sun (DEQ034b), sunscreen SPF variety used most usually (DEQ036) and questions concerning psoriasis (DEQ053, DEQ055 and DEQ057) were dropped from the 2007-2008 information set.
Queries on time spent outside on work or school days (DEQ120) and on days not at work or at faculty (DEQ125) were added in 2007 – 2008. Responses to questions DEQ one hundred twenty and DEQ125 were collected in either hours or minutes. For knowledge unleash functions all responses were converted to minutes. Values of 14 minutes or less were grouped into one category. These variables were then renamed DED120 and DED125, respectively.
Responses to question DEQ038Q, “How several times within the past year have you had a sunburn?”, with values of twenty or a lot of, were combined into one class. The variable was renamed DEQ038D.
Analysts ought to bear in mind that some questions could have terribly few responses for some classes. Even with two years of information collection, there may not be sufficient sample size for such variables to be analytically useful. In these cases, it could be necessary to mix a lot of than 2 years of knowledge to conduct analysis.
Although these data were collected as half of the household questionnaire, if they’re merged with the MEC exam information, exam sample weights ought to be used for the analyses.
Please see the NHANES Analytic Guidelines and the on-line NHANES Tutorial for further details on the utilization of sample weights and alternative analytic problems. Both of those are available on the NHANES web site.