A comparison of breast density measures between mothers and adolescent daughters

Table 3 The association between breast measures of daughters and mothers^a

		Breast volume^b		FGV^b		%FGV^b
		ß	p	ß	p	ß	p
All mother-daughter pairs (N = 112)^a
Corresponding Mother's DXA measure		0.08	0.26	0.12	0.09	-0.04	0.53
Ethnicity (all or part), daughter^c	Caucasian	-0.06	0.26	-0.04	0.55	0.05	0.35
	Asian	0.02	0.70	0.06	0.34	0.06	0.25
	Other	0.08	0.12	0.09	0.10	0.01	0.83
DXA % total body fat, daughter		0.51	<0.0001	0.11	0.06	-0.90	<0.0001
DXA % total body fat, mother		-0.05	0.46	-0.04	0.59	0.01	0.85
Tanner breast (1&2, 3, 4&5)^d		0.57	<0.0001	0.74	<0.0001	0.23	<0.0001
Age, daughter (years)		-0.03	0.59	0.06	0.39	0.19	<0.001
Age, mother (years)		0.10	0.05	0.11	0.05	-0.04	0.44
	Adjusted r ²	0.74		0.69		0.78
Mothers and daughters in Tanner stages 4&5 only (N = 57)^a
Corresponding Mother's DXA measure		0.30	0.02	0.58	<0.0001	-0.06	0.56
Ethnicity (all or part), daughter^c	Caucasian	-0.16	0.08	-0.16	0.19	0.04	0.59
	Asian	0.03	0.74	0.08	0.49	0.04	0.55
	Other	0.10	0.26	0.17	0.14	0.01	0.96
DXA % total body fat, daughter		0.73	<0.0001	0.23	0.05	-0.90	<0.0001
DXA % total body fat, mother		-0.16	0.22	-0.15	0.27	0.06	0.53
Age, daughter (years)		-0.04	0.68	0.03	0.83	0.11	0.16
Age, mother (years)		0.14	0.16	0.25	0.06	-0.04	0.59
	Adjusted r ²	0.61		0.34		0.77

^aObtained by multiple linear regression with standardized regression coefficients (ß); 12 mothers with two daughters were included twice; all characteristics shown in the table are included as covariates in the model; N = 112 pairs for all mother-daughter pairs and N = 57 for mothers and daughters in Tanner stages 4&5 only due to one mother missing DXA whole body scan.
^bIn daughters, breast volume and absolute FGV were log-transformed, and %FGV was square-root transformed.
^cBased on percentages; participants were counted more than once if they reported multiple ethnicities.
^dTanner breast stages were grouped into 1&2, 3 and 4&5 as a continuous varia.