Table 1.

Criteria for determining study eligibility.

Characteristics	Criteria
Study year	Studies published from January 2000 to March 2014
Study type	1. Case–control trials
	2. Cohort studies
Population	Females of all ages
Intervention	1. Breast density measurement methods
Comparator	1. Robustness, reliability and reproducibility of density measurement methods
Outcomes	1. Mammographic breast density measurement performance
	2. Breast cancer risk prediction capability

Studies were characterized according to the year of publication, study type, population, intervention, comparators and outcomes.