The Cardiovascular Disease and Health section (variable name prefix CDQ) provides participant level interview data on evaluating cardiovascular health and includes questions to assess the presence of angina pectoris as defined by the Rose questionnaire. (Rose, 1968)
All study participants who are 40 years of age and older are asked to respond to this section.
Interview Setting and Mode of Administration
These questions were asked, in the home, by trained interviewers using the Computer-Assisted Personal Interviewing (CAPI) system.
Quality Assurance & Quality Control
The CAPI system is programmed with built-in consistency checks to reduce data entry errors. CAPI also uses online help screens to assist interviewers in defining key terms used in the questionnaire.
Data Processing and Editing
Edits were made to ensure the completeness, consistency, and analytic usefulness of the data.
The variables in this section are comparable to the CDQ variables released for 2001-2002, 2003-2004, 2005-2006 and 2007-2008. Other than question CDQ010, these questions are not comparable to the CDQ questions for NHANES 1999-2000, which focused on symptoms related to congestive heart failure.
Rose questionnaire criteria:
Grade 1 Angina
is defined as CDQ001 = 1 and CDQ002 = 1 (but CDQ003 ≠ 1) and CDQ004 = 1 and CDQ005 = 1 and CDQ006 = 1, plus either (CDQ009D = 4 or CDQ009E = 5) or (CDQ009F = 6 and CDQ009G = 7).
Grade 2 Angina
is defined as CDQ001 = 1 and CDQ002 = 1 and CDQ003 = 1 and CDQ004 = 1 and CDQ005 = 1 and CDQ006 = 1, plus either (CDQ009D = 4 or CDQ009E = 5) or (CDQ009F = 6 and CDQ009G = 7).
Changes Since 2007-2008:
There were no questionnaire changes for 2009-2010.
Although these data were collected as part of the household questionnaire, if they are merged with the MEC exam data, exam sample weights should be used for the analyses.
Please refer to the NHANES Analytic Guidelines
and the on-line NHANES Tutorial
for further details on the use of sample weights and other analytic issues.