63.4% of Americans Know His/Her Own Blood Type

According to a survey held by Osaka University (Japan) in 2005, 63.4% of American people know his/her own blood type.

Social Reseach Database on Questionnaires
[http://srdq.hus.osaka-u.ac.jp/metadata.cgi?lang=jp&page=s_view&sid=164]

Q49: Blood Type

• A: 1939 people (33.4%)
• B: 460 people (14.8%)
• AB: 229 people (7.4%)
• O: 1380 people (44.4%)
• Not sure: 1779 people
• Valid Answers: 4907 people

The following question and answer explains the reason.

Q51: Underwent a blood test in the last 12 months

• Yes, as part of a periodic test:　2961 people (60.1%)
• Yes, because of suspicion of disease:　214 people (4.3%)
• Valid answers: 4929 people