Skip to main content

Table 2 Risk of colon cancer and HRT use: Ever-use of HRT vs. never-use.

From: Colon cancer risk and different HRT formulations: a case-control study

  e-case1 e-ctrl.1 Adj. OR (95% CI)
Ever HRT 150 562 0.97 (0.71–1.32)
Duration of use 2,3    
1–4 yrs 22 130 0.65 (0.37–1.16)
5–9 yrs 41 180 1.06 (0.67–1.68)
10+ yrs 45 175 0.87 (0.53–1.41)
Time since first use 2,3    
1–4 yrs 41 148 1.04 (0.66–1.66)
5–9 yrs 46 193 0.99 (0.64–1.52)
10–14 yrs 36 133 1.04 (0.65–1.69)
15+ yrs 27 88 0.79 (0.45–1.39)
Time since last use 2,3    
< 1 yr/current use 136 496 1.00 (0.74–1.38)
1–2 yrs 8 43 0.72 (0.31–1.69)
3–4 yrs 5 22 0.85 (0.29–2.50)
5+ yrs 1 1 n.d.4
  1. 1 e-case, e-ctrl = number of observations for exposed cases or exposed controls respectively.
  2. 2 time variables were rounded
  3. 3 no significant trend with increasing time
  4. 4 n.d. = no data
  5. Conditional logistic regression analysis [odds ratios (OR) and 95% confidence intervals]; adjustment for BMI, family history of colon cancer, childbearing history, age at first live birth, duration of breast-feeding, age at menarche, ever OC use, education. Index dates 0.5 = exposure information was not considered 0.5 years prior to cancer diagnosis.