. 2016 Apr 13;183(10):884–893. doi: 10.1093/aje/kwv226

Table 4.

P Values From Likelihood Ratio Tests Conducted on Nested Logistic Regression Models for the Association of Socioeconomic and Reproductive Factors With ER/PR-Negative Breast Cancer, Breast Cancer Care in Chicago Study, 2005–2008

Model^a	Model 2^b	Model 3^c	Model 4^d	Model 5^e
Model 1	0.0087	0.0024	0.002	0.0285
Model 2		—^f	0.0185	0.1466
Model 3			0.0728	0.2661
Model 4				0.4307

Abbreviations: ER, estrogen receptor; PR, progesterone receptor; RPF, reproductive factors; SEP, socioeconomic position.

^a Model 1 was a logistic regression model of ER/PR-negative breast cancer as a function of age and minority ethnicity.

^b Model 2 consisted of model 1 with the addition of the composite variable for SEP.

^c Model 3 consisted of model 1 with the addition of the composite variable for RPF.

^d Model 4 consisted of model 1 with the addition of the composite variables for both SEP and RPF.

^e Model 5 consisted of model 4 with the addition of the variables for body mass index, breastfeeding, and oral contraceptive use.

^f Corresponds to nonnested models.