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Article
October 1978

Thrombophlebitis of the Lower Extremities and ABO Blood Type

Author Affiliations

From the Boston Collaborative Drug Surveillance Program, Boston University Medical Center, Waltham, Mass.

Arch Intern Med. 1978;138(10):1566-1567. doi:10.1001/archinte.1978.03630350088024
Abstract

Of 86 medical patients with a hospital discharge diagnosis of thrombophlebitis of the lower extremity, 70 (81%) were of blood type A, B, or AB (non-O). Of the 344 reference patients matched for age, sex, and country, 187 (54%) were of non-0 blood type. The estimate of risk ratio of non-O blood type patients to O blood type patients was 3.7 with 90% confidence limits 2.3 and 6.0. The association between non-0 blood type and thrombophlebitis of the lower extremity was strongest among the younger patients and women.

(Arch Intern Med 138:1566-1567, 1978)

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