Table 2. Association between the abnormality score and clinical and radiological factors on univariable and multivariable linear regression.

Variable		Univariable			Multivariable
		Unstandardized		P *	Unstandardized		Standardized coefficients	P *
		Coefficients	SE		Coefficients	SE
Indication
	Screening	Ref			Ref
	Diagnostic	18.9	2.41	< 0.001	9.6	2.17	0.299	< 0.001
Palpability†
	No	Ref
	Yes	25.4	2.34	< 0.001
Density
	Fatty	18.8	3.46	< 0.001	5.9	3.01	0.181	0.053
	Dense	Ref			Ref
Finding
	Asymmetry	17.7	3.25	< 0.001	15.1	3.25	0.468	< 0.001
	Distortion	31.4	7.65	< 0.001	30.6	7.54	0.948	< 0.001
	Mass	43.6	3.05	< 0.001	38.1	3.24	1.182	< 0.001
	Mass with microcalcifications	56.6	3.89	< 0.001	52.0	3.95	1.612	< 0.001
	Microcalcifications only	20.8	2.98	< 0.001	20.5	2.93	0.637	< 0.001
	Negative	Ref			Ref

^*P-values were calculated using multivariable linear regression, ^†Palpability was excluded from the multivariable analysis due to its large overlap with diagnostic indications.

SE = standard error, Ref = reference category