Table 2.

Additional factors (covariates) to consider

Time relatedAge at time of study or last contact
Age at time of diagnosis of event of interest
Age at time of primary cancer diagnosis
Interval from cancer diagnosis to study
Race and ethnicity
Highest level of educational attainment
Employment status
Health insurance status
Household and/or personal income
Marital status
Parity and age at first live birth
Lifestyle behaviorsTobacco use
Physical activity
Alcohol use
Psychosocial/quality-of-lifeSF-36 quality of life
Depression and/or anxiety screen
Fear of cancer
MiscellaneousFunctional status
Limitations of activity
Self efficacy

Useful sources of question items:

U. S. National Health Interview Survey (NHIS).

U. S. Behavioral Risk Factor Surveillance System (BRFSS).