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Table 5 Association between ever vs. never smoking and breast cancer subtypes in 21,831 women from Danish Nurse Cohort

From: Active smoking and risk of breast cancer in a Danish nurse cohort study

   Never Former Current Ever
N Ref. HR (95% CI) HR (95% CI) HR (95% CI)
Estrogen Receptor (ER) Status
 ER + 851 1.00 1.06 (0.89–1.26) 1.28 (1.09–1.51) 1.17 (1.01–1.36)
 ER - 172 1.00 1.11 (0.77–1.62) 1.11 (0.77–1.61) 1.11 (0.81–1.53)
Receptor Status
 ER+/PR+ 366 1.00 1.17 (0.90–1.53) 1.36 (1.06–1.76) 1.27 (1.02–1.59)
 ER+/PR- 111 1.00 1.56 (0.94–2.59) 1.92 (1.19–3.10) 1.75 (1.12–2.71)
 ER−/PR- 107 1.00 1.01 (0.63–1.63) 1.15 (0.73–1.82) 1.08 (0.72–1.61)
 ER−/PR+ 10 1.00 1.76 (0.41–7.56) 0.49 (0.08–3.01) 1.02 (0.26–4.07)