Table 3.

Demographic and medical history variables

Demographic variables (CCD and control groups)	Additional medical history (CCD group only)
Subject variables	Subject variables
Race and ethnicity	Cardiac diagnosis
Grades in school (above/below/average)	Heart failure classification
Failed/repeated grades
Individual education plan or 504 plan
Presence of primary care physician
Other specialty care physicians and health care specialists
Number of medications
Past 12 months
School days missed due to illness
Emergency room visits
Hospitalizations
Intensive care unit admissions
Days in intensive care unit
Parent/family variables
Residence (rural/urban/suburban)
Primary caregiver of child
Marital status of caregiver
Individuals who live in the household
Education of caregiver
Employment of caregiver
Annual household income
Home status (rent/own)
Insurance status