抄録
Pelvic radiographs of 200 consecutive Japanese patients admitted for hip surgery at the Hospital of Kobe University in Japan were compared with those of 199 consecutive Caucasian patients admitted for the same purpose to a New England Hospital in USA over a similar 4.5 year between 1972 and 1976.
The incidence of primary osteoarthritis was 1.0% among the Japanese osteoarthritic patients and 57.8% among the Caucasian osteoarthritic patients, that of secondary osteoarthritis was 75.5% among Japanese and 21.1% among Caucasian; and that of secondary osteoarthritis in the wide sense which includes burned-out rheumatoid arthritis, ankylosing spondilytis, old septic arthritis or tuberculosis, old fracture or dislocation and old avascular necrosis, etc., was 23.5% among Japanese and 21.1% among Caucasian. Excluding these underlying diseases as“non-osteoarthritic”from secondary osteoarthritis, the incidence of primary osteoarthritis came to 1.3% among Japanese and 73.3% among Caucasian, and that of secondary arthritis came to 98.7% in Japanese and 26.7% in Caucasian.
It would appear that genetic factors are implicated in the etiology of osteoarthritis of the hip.
