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Table 2 Cox proportional hazards analysis on overall survival of 842 breast cancer patients followed by thyroid cancer

From: Clinicopathological features, survival and risk in breast cancer survivors with thyroid cancer: an analysis of the SEER database

VariableHR (CI)p-value
Age at diagnosis < 0.001
 ≤ 40Reference 
 41–501.158 (0.519–2.582)0.720
 51–601.613 (0.737–3.533)0.232
 61–704.940 (2.306–10.585)< 0.001
 > 7011.681 (5.409–25.225)< 0.001
Race 0.279
Tumor site 0.520
Tumor size 0.096
Positive lymph nodes < 0.001
 0Reference 
 1–31.649 (1.049–2.591)0.030
 4–92.440 (1.235–4.821)0.010
  ≥ 106.515 (3.106–13.663)< 0.001
 Unknown2.054 (1.200–3.417)0.009
Histology 0.125
Grade 0.321
ER 0.831
PR 0.767
  1. HR Hazard ratio, CI Confidence interval, ER Estrogen receptor, PR Progesterone receptor