Skip to main content

Advertisement

Table 2 Distribution of potential risk factors for breast cancer according to serum TSH level

From: Prospectively measured triiodothyronine levels are positively associated with breast cancer risk in postmenopausal women

Factor TSH quartile
  1 2 3 4 All
  N = 647 N = 528 N = 793 N = 710 N = 2,678
  Column percent
(TSH levels in italics)
TSH (mIU/l)      
   period I <1.50 1.60 to 2.00 2.10 to 3.00 3.10  
   period II <0.90 1.00 to 1.30 1.40 to 2.00 2.10  
Age      
   <50 21.5 42.6 40.9 24.9 32.3
   >50 78.5 57.4 59.1 75.1 67.7
Premenopausal 24.0 41.9 41.5 27.3 33.6
Peri/postmenopausal 76.0 58.1 58.5 72.7 66.4
HRT in peri/postmenopausal 17.3 20.8 17.2 13.0 16.6
   missing 0.2 - - - 0.1
Nulliparity 13.9 13.1 18.0 18.2 16.1
   missing 1.4 1.9 0.5 0.3 0.9
OC-use 3.7 8.7 8.7 4.4 6.3
   missing 1.7 2.1 0.8 0.3 1.1
Menarche <12 years 13.4 12.5 13.0 12.0 12.7
   missing 2.3 3.6 1.0 0.6 1.7
Smoking      
   never 42.2 41.9 47.9 51.0 46.2
   current 36.0 36.9 31.9 29.7 33.3
   ex 20.2 19.3 19.7 18.9 19.5
   missing 1.5 1.9 0.5 0.4 1.0
Alcohol consumption      
   nothing 17.0 12.3 14.2 16.5 15.1
   less than every week 59.4 53.2 57.8 60.0 57.8
   every week 21.5 30.7 26.5 23.0 25.2
   missing 2.2 3.8 1.5 0.6 1.9
BMI      
   <20 10.0 11.6 9.1 7.3 9.3
   ≥20 <25 53.3 50.8 57.9 52.0 53.8
   ≥25 <30 26.9 27.3 23.8 28.9 26.6
   ≥30 9.7 10.4 9.2 11.8 10.3
Height      
   ≤ 160 30.3 26.9 29.5 33.9 30.4
   >160 ≤ 165 32.8 29.5 31.8 33.2 32.0
   >165 ≤ 170 26.0 27.5 25.3 21.7 24.9
   >170 11.0 16.1 13.4 11.1 12.7
Education      
   <12 years 58.6 54.4 55.1 61.0 57.4
   12 years 23.3 24.6 26.4 22.0 24.1
   >12 years 14.2 18.8 14.2 13.2 14.9
   missing 3.9 2.3 4.3 3.8 3.7
Married 45.0 49.6 51.2 54.9 50.4
   missing 19.6 25.0 7.6 4.2 13.0
  1. Abbreviations: TSH, thyrotropin; HRT, hormone replacementtherapy; OC, oral contraceptives; BMI, body mass index.