The Rose Angina Questionnaire and a checklist of medical conditions are implemented to determine health status for a moderate intensity exercise program [ 29].
In addition, two health-related variables were assessed at baseline: co-morbidity using a 19-item checklist of medical conditions [ 21, 38] and cognitive status using the Dutch version of the Telephone Interview for Cognitive Status (TICS) [ 39, 40].
Panel members were invited to participate in a survey about health, and after consenting, they were asked to complete an initial screening survey that included demographics and a checklist of health conditions.
The wave 2 and wave 3 follow-up questionnaires each contained a checklist of medical conditions headed by the question "Have you ever been told by a doctor or other health professional that you had any of these conditions?" Respondents also reported year of diagnosis.
Age, gender and a checklist of chronic conditions were also collected.
Following the logic outlined above, we included a checklist of seven conditions usually secondary to SCD and two treatments indicative of severity as part of the data collection.
As mentioned earlier, the checklist of health conditions were gleaned from an intake assessment distributed to patients at M.D. Anderson's outpatient clinics.
Each subsample is administered one of six checklists of chronic conditions and respondents are asked to indicate the presence or absence of each condition specified on the particular list assigned to them.
A modified version of the CIDI checklist of chronic medical conditions was used to assess the presence of the following conditions: cancer, cardiovascular disease, chronic pain, diabetes, high blood pressure, neurological conditions, and ulcer.
The prevalence of GERD or heartburn was ascertained by the NHWS question "Which of the following conditions have you experienced in the past 12 months?" This was followed by a checklist of diseases and conditions including GERD and, separately, heartburn.
