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Table 4 Discrepancies on responses (yes to not sure, or no to not sure) between the HealthQuiz (HQ the Donor Health Assessment Questionnaire (DHAQ) among the 1239 study participants.

From: Comparison of deferral rates using a computerized versus written blood donor questionnaire: a randomized, cross-over study [ISRCTN84429599]

Questions "Not sure" of risk on HQ and risk denied on DHAQ n (%) Risk identified on DHAQ and "not sure" of risk on HQ n (%)
Risk for HIV/AIDS or STDs   
In the last 12 months have you had sex with someone who may have participated in high risk activities (sexual background uncertain)? 8/1211 (0.7) 0
Have you had an AIDS test elsewhere (other than for donating blood)? 6/1239 (0.5) 2/1239 (0.2)
Had symptoms of AIDS?* 29/1239 (2.3) 0
Blood Contact Risk   
Have you ever had yellow jaundice (other than at birth), hepatitis, or liver disease? 2/1216 (0.2) 0
In the last 12 months to your knowledge have you come in close (intimate) contact with someone with yellow jaundice or hepatitis? 7/1239 (0.6) 0
Medication Use   
In the last 3 days have you taken any type of medicine or drugs, except birth control pills? 13/1239 (1.0) 9/1239 (0.7)
Have you taken Accutane or Tegison for a skin disorder or growth hormone (human pituitary)? 118/1123 (10.5) 0
In the last month have you taken Accutane for a skin disorder, Proscar or Danazol? 7/94 (7.4) 0
Illness or Exposure   
Are you free from a cold, flu, infection or active allergy today? 1/1239 (0.1) 4/1239 (0.3)
Have you had a vaccination in the last 3 months or a rabies shot in the last year? 28/1239 (2.3) 1/1239 (0.1)
Have you had surgery in the last 6 months? 4/1239 (0.3) 3/1239 (0.2)
Have you had any of the following?   
   Epilepsy, coma, stroke, repeated seizures or fainting 9/1239 (0.7) 1/1239 (0.1)
   Heart or blood pressure problems or heart surgery 62/1239 (5.0) 0
   Cancer, diabetes, ulcerative colitis or Crohn's disease 14/1239 (1.1) 1/1239 (0.1)
   Kidney, lung or blood condition 23/1239 (0.6) 0
Have you been pregnant in the last 6 months or breastfed in the last 3 months? 7/1239 (0.6) 1/1239 (0.1)
Have you ever had malaria? 12/1239 (1.0) 0
In the last 3 years have you lived or visited an area where malaria is common? 28/1239 (2.3) 1/1239 (0.1)
  1. * the symptoms of AIDS included: weight loss, night sweats, fever, diarrhoea or cough; lumps in the armpits, neck or groin, coloured patches on skin or inside mouth