Test-retest reliability of self-reported mammography in women veterans.
BACKGROUND
Mammography self-report is used to monitor screening and evaluate intervention trends; however, few studies have examined reliability.


METHODS
Reliability of self-reported lifetime number of mammograms, most recent mammogram date, and predictors of reliability were assessed using data from Project H.O.M.E. The study population was 2,494 women 52 years and over, listed in the U.S. National Registry of Women Veterans, with no history of breast cancer, who completed both baseline (2000-2002) and year 1 (2002-2003) surveys.


RESULTS
Reliability of lifetime number of mammograms was 60.9% for exact consistency and 79.9% for consistency within one mammogram. Thirty-five percent was exactly consistent in reporting mammogram date; 55.6% was consistent within 3 months. Completing both surveys by mail and reporting fewer lifetime mammograms at baseline were positively associated with consistency of reporting lifetime number. White race/ethnicity, having a Bachelor's degree, reporting a health care provider's recommendation for a mammogram, having a screening mammogram, completing both surveys by mail, and being in the maintenance or action stages of change were associated with consistency in reporting date.


CONCLUSIONS
Reliability varies with the measure of self-reported mammography. Likewise, predictors show different patterns of association with different definitions. Our findings call attention to the need for explicit definitions and measures of mammography use.
Rivera
Semilla
S
The University of Texas at Houston School of Public Health, Division of Health Promotion and Behavioral Sciences, PO Box 20186, Houston, TX 77225, USA.
Vernon
Sally W
SW
Tiro
Jasmin A
JA
Coan
Sharon
S
Del Junco
Deborah
D
Chan
Wen
W
Coker
Ann
A
D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000517:prevention & control*; D003955:Diagnostic Tests, Routine / Q000706:statistics & numerical data*; D005260:Female; D019538:Health Care Surveys / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008327:Mammography / Q000706:statistics & numerical data*; D008875:Middle Aged; D015999:Multivariate Analysis; D012042:Registries; D018570:Risk Assessment; D012307:Risk Factors; D012650:Self Disclosure; D014481:United States; D014728:Veterans / Q000523:psychology*