Table 1

Baseline characteristics of the UKCTOCS cohort

Number of womenPer cent
Birth cohort
 1925 to 192925881.3
 1930 to 193426 20112.9
 1935 to 193941 41820.4
 1940 to 194451 05725.2
 1945 to 194955 51027.4
 1950 to 1955*25 86312.8
Ethnicity
 Caucasian195 27596.4
 Black27691.4
 Asian18560.9
 Other16950.8
 Missing data10430.5
Cancer history
 Personal history of cancer12 0606.0
 Breast76523.8
 Bowel7600.4
 Lung1000.1
 Other35481.8
Maternal history of cancer
 Maternal history of breast/ovarian cancer16 0257.9
 Breast12 9906.4
 Ovarian31621.5
 Both1270.1
Family history of breast or ovarian cancer
 Family history of ovarian cancer91844.5
 Number of relatives with ovarian cancer
  190280.1
  21420.1
  >2140
 Family history of breast cancer45 01022.2
 Number of relatives with breast cancer
  136 96518.2
  264603.2
  >215850.8
BMI
 Underweight (<18.5)18740.9
 Normal (18.5–24.9)83 06241
 Overweight (25.0–29.9)74 28336.7
 Obese (>30)41 23620.3
Education†
 College/University or equivalent29 42820.2
 Other formal education69 86248.4
 No formal educational qualification41 66628.8
 Missing data34982.4
  • *Includes 370 women born in 1955

  • †Subcohort analysis of 144 454 from a follow-up questionnaire

  • BMI, body mass index; UKCTOCS, UK Collaborative Trial of Ovarian Cancer Screening.