Table 4.

Tumour visibility on DBT + FFDM: Multivariate analysis

Variables	Multivariate analysis
	Odds ratio	95% Confidence interval	P-value a
Breast composition: grade d	0.02	0.04–0.09	<0.001
Mass density: isodense	0.29	0.07–1.15	0.203

DBT, digital breast tomosynthesis; FFDM, full-field digital mammography.

^a P-values were obtained by the multivariate logistic regression model after controlling for significant variables (p-value <0.05 on univariate analysis in Table 2).