Table 5.

Analysis results of BCDDP data. The variables in the full model include: number of first-degree relatives with breast cancer (numrel), age at menarche (two dummy variables agemen1–agemen2 according to ≥ 14, 12–13, or < 12 years), age at first live birth (three dummy variables ageflb1–ageflb3 according to < 20, 20–24, 25–29, and ≥ 30 years), weight (in kg), number of previous biopsies (nbiops), and mammographic density (MD). The variables in the reduced model include: family history (famhist, binary according to yes/no), age at menarche (two dummy variables agemen1–agemen2 according to ≥ 14, 12–13, or < 12 years), age at first live birth (three dummy variables ageflb1–ageflb3 according to < 20, 20–24, 25–29, and ≥ 30 years), and weight (two dummy variables weight1–weight2 according to < 62.6, 62.6–73.1, and ≥ 73.1 kg)

	Full model†				Reduced model†
variable	Internal data Est. (SE)	mGR Est. (SE)	CML Est. (SE)	variable	Internal data Est. (SE)	External data Est. (SE)
numrel	0.648 (0.090)	0.371 (0.038)	0.297 (0.033)	famhist	0.716 (0.101)	0.354 (0.030)
agemen1	0.083 (0.091)	0.074 (0.034)	0.077 (0.035)	agemen1	0.059 (0.090)	0.052 (0.030)
agemen2	0.468 (0.124)	0.185 (0.041)	0.167 (0.042)	agemen2	0.387 (0.120)	0.081 (0.031)
ageflb1	−0.018 (0.146)	−0.109 (0.054)	−0.117 (0.057)	ageflb1	0.046 (0.142)	−0.053 (0.048)
ageflb2	0.086 (0.144)	0.003 (0.052)	−0.005 (0.055)	ageflb2	0.261 (0.139)	0.171 (0.043)
ageflb3	0.251 (0.173)	0.173 (0.067)	0.163 (0.070)	ageflb3	0.449 (0.167)	0.358 (0.057)
weight	0.020 (0.004)	0.022 (0.003)	0.024 (0.002)	weight1	0.061 (0.088)	0.106 (0.031)
				weight2	0.135 (0.106)	0.214 (0.031)
nbiops	0.180 (0.070)	0.178 (0.069)	0.165 (0.073)
MD	0.430 (0.044)	0.428 (0.045)	0.441 (0.047)

^†: adjusted for 5-year age strata

mGR: modified GR for case-control sampling

CML: constrained likelihood method

Est.: estimated coefficient

SE: estimated standard error