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Table 1 Response and participation rates of childhood cancer survivors and sister controls in the DCOG LATER-VEVO study*

From: A nationwide study on reproductive function, ovarian reserve, and risk of premature menopause in female survivors of childhood cancer: design and methodological challenges

  Survivors sister controls
Invited 1611 429
 Response received (responders) 1215 (75%) 333 (78%)
 No response received (non-responders) 396 (25%) 96 (22%)
Responders   
Participants   
  Questionnaire only 306 (19%) 96 (22%)
  Questionnaire and blood sample 126 (8%) 43 (10%)
  Questionnaire, blood sample and transvaginal ultrasound 509 (32%) 174 (41%)
Non-participants 274 (17%) 20 (5%)
  1. * Rates acquired as of March 1 st 2012.