Table 1 Characteristics of 623 080 The Million Women Study participants who provided details on the frequency of consumption of organic food and who did not change their diet in the last 5 years because of illness

From: Organic food consumption and the incidence of cancer in a large prospective study of women in the United Kingdom

  Frequency of consumption of organic food
  Never
(n =187 451)
Sometimes
(n =390 040)
Usually/always
(n =45 589)
Age, mean (s.d.), years 59.3 (4.9) 59.1 (4.9) 59.7 (5.0)
Socioeconomic status, % (n) in upper third 31 (58 014) 37 (142 261) 33 (15 235)
BMI, mean (s.d.), kg m−2 26.3 (4.5) 25.8 (4.3) 25.4 (4.3)
Height, mean (s.d.), cm 161.9 (6.7) 162.6 (6.6) 162.8 (6.8)
Current smoker, % (n) 16 (29 624) 11 (40 311) 11 (4703)
Alcohol consumption, mean (s.d.), gram per week 42.0 (57.2) 49.6 (59.6) 49.8 (60.5)
Strenuous physical activity, % (n) > once weekly 35 (64 051) 46 (176 585) 55 (24 288)
Parity, mean (s.d.) number of full-term pregnancies 2.2 (1.2) 2.0 (1.2) 2.0 (1.2)
Fibre consumption, mean (s.d.), gram per day 12.8 (4.7) 14.4 (4.8) 15.0 (5.4)
Consumers of red and processed meat, % (n) 58 (108 182) 52 (203 283) 43 (19 570)
Follow-up for cancer incidence
Number of incident cancers (total =53 769) 16 520 33 307 3942
Woman-years of follow-up (in 1000s) 1743 3618 420
  1. Abbreviation: BMI=body mass index.
  2. Missing values not included in denominator for percentages. Values for socioeconomic status, height, parity, and strenuous physical activity are those reported in the recruitment survey. Values for age, BMI, smoking status, alcohol consumption, fibre consumption, and red and processed meat consumption are those reported in the 3-year survey.