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Table 2 Breast cancer risk factors by estrogen receptor status.

From: Organochlorine exposures influence on breast cancer risk and survival according to estrogen receptor status: a Danish cohort-nested case-control study

  Estrogen receptor positive Estrogen receptor negative
Factor Adjusted OR (95% CI)a p trendb Adjusted OR (95% CI) p trendb
Weight (kg) by quartile
   <58 1.0 ref.c   1.0  
   58-64 0.7 (0.5-1.5)   1.3 (0.5-3.6)  
   65-71 1.1 (0.7-1.8)   1.9 (0.7-4.9)  
   >71 1.2 (0.7-1.9) >0.20 2.1 (0.8-5.9) 0.10
Number of full term pregnancies
   0 1.0   1.0  
   1 1.0 (0.6-1.6)   1.7 (0.6-5.1)  
   >1 0.6 (0.4-0.9) 0.01 1.2 (0.5-3.1) >0.20
Hormone replacement-therapy
   Never 1.0   1.0  
   Ever 1.1 (0.7-1.7)   1.8 (0.8-4.1)  
  1. a Odds ratio, 95% confidence interval, age-adjusted; b two sided p-value for linear trend in OR's, c reference category.