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Table 1 Distribution of risk factors in relation to HRT, ERT, and OC use

From: Associations of hormone replacement therapy and oral contraceptives with risk of colorectal cancer defined by clinicopathological factors, beta-catenin alterations, expression of cyclin D1, p53, and microsatellite-instability

Factor (n of subjects with information) Category Current CHRT n = 3051 (18.0%) Current ERT n = 1375 (8.0%) HRT non use n = 12519 (73.9%) Ever OC n = 8353 (49.1%) Never OC n = 8661 (50.1%)
Age at baseline (16990) Years* 56.7 59.2 57.6 53.7 61.0
p     <0.001   <0.001
Education (16947) Not completed school 0.2’ 0.2 0.9 0.3 1.2
Elementary school (6–8 years) 31.8 34.7 40.2 29.6 47.4
0-level college (9–10 years) 33.4 34.4 29.7 32.5 28.3
A-level college (10–12 years) 7.8 6.2 6.8 8.1 5.8
1 year university 8.9 8.6 8.2 9.9 6.9
University degree 17.6 15.9 14.2 19.5 10.3
p     <0.001   <0.001
Smoking status (16984) Yes regularly 23.7 20.3 23.7 27.8 20.6
Yes occasionally 4.8 4.0 4.2 4.9 3.8
Former smoker 31.2 18.0 26.9 31.6 25.0
Never smoked 40.0 44.7 45.2 35.8 54.2
p     <0.001   <0.001
Alcohol consumption (16990) g/day* 9.47 8.65 7.27 9.3 6.05
p     <0.001   <0.001
BMI (16964) Kg/m 2* 24.8 25.0 26.6 24.8 26.0
p     <0.001   <0.001
  1. *All values given in percentages unless otherwise indicated.