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Table 3 Discrepancies on responses (yes to no, or no to yes) between the HealthQuiz (HQ) and 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 Risk identified on HQ and denied on DHAQ n (%) Risk identified on DHAQ and denied on HQ n (%) p value for McNemar's Chi square test
Risk for HIV/AIDS or STDs    
Since 1977, have you participated in any of the activities that put one at risk for AIDS?* 4/1211 (0.3) 0 0.13
Have you even once shared needles or taken street drugs by needle? 1/101 (0.1) 0 1.00
In the last 12 months have you had sex with someone who may have participated in high-risk activities (sexual background uncertain)? 29/1211 (2.4) 5/1211 (0.4) 0.001
Have you had an AIDS test elsewhere (other than for donating blood)? 8/1239 (0.6) 13/1239 (1.0) 0.383
Had symptoms of AIDS? † 34/1239 (2.7) 2/1239 (0.2) <0.001
In the last 12 months have you had a tattoo, ear-piercing, acupuncture, electrolysis, needle stick injury or graft? 14/1216 (1.2) 8/1216 (0.7) 0.286
Have you ever had yellow jaundice (other than at birth), hepatitis or liver disease? 17/1216 (1.4) 0 <0.001
In the last 12 months to your knowledge have you come in close (intimate) contact with someone with yellow jaundice or hepatitis? 1/1239 (0.1) 0 1.00
In the last 12 months have you received blood, plasma, clotting factors or immune globulin? 36/1239 (2.9) 1/1239 (0.1) <0.001
Medication Use    
In the last 3 days have you taken any type of medication or drugs, except birth control pills or vitamins? 68/1239 (5.5) 27/1239 (2.2) <0.001
Have you taken Accutane or Tegison for a skin disorder or growth hormone (human pituitary)? 7/1123 (0.6) 0 0.02
In the last month have you taken Accutane for a skin disorder, Proscar or Danazol? 1/94 (1.1) 0 1.00
Illness or exposure    
Are you free from cold, flu, infection or active allergy today? 50/1239 (4.0) 3/1239 (0.2) <0.001
Have you had a vaccination in the last 3 months or a rabies shot in the last year? 12/1239 (1.0) 7/1239 (0.6) 0.36
Have you had surgery in the last 6 months? 16/1239 (1.3) 4/1239 (0.3) 0.01
Have you had any of the following?    
   Epilepsy, coma, stroke, repeated seizures or fainting 21/1239 (1.7) 8/1239 (0.6) 0.02
   Heart or blood pressure problems or heart surgery 216/1239 (17.4) 3/1239 (0.2) <0.001
   Cancer, diabetes, ulcerative colitis or Crohn's disease 17/1239(1.4) 4/1239 (0.3) 0.007
   Kidney, lung or blood condition 149/1239 (12.0) 4/1239 (0.3) <0.001
Have you been pregnant in the last 6 months or breastfed in the last 3 months? 3/1239 (0.2) 1/1239 (0.1) 0.625
In the last 3 years have you lived in or visited an area where malaria is common? 3/1239 (0.2) 1/1239 (0.1) 0.625
  1. * these activities included: if male, having sex with another male, even once; sharing needles or taking street drugs by needle; receiving regular treatment with blood or blood products; being the sexual partner of someone who has taken part in any of the above activities or who has contracted AIDS or has tested positive for AIDS † the symptoms of AIDS included: weight loss, night sweats, fever, diarrhea or cough; lumps in the armpits, neck or groin, coloured patches on skin or inside mouth