Abstract: Objective To investigate the prevalence of femoral head necrosis in Taiqian county, and possible influencing factors. Methods The census was adopted to screen the households for femoral head necrosis in the resident population within the jurisdiction of Taiqian county, Henan province, and the suspected cases with typical symptoms found in the physical examination were diagnosed by imaging examination. Patients who were previously diagnosed with femoral head necrosis were selected as the case group. According to the ratio of 1∶1, healthy people from the same village, the same sex and the same age group （age difference ≤ 3 years） excluded from orthopedics-related diseases were selected as the control group. The self-designed questionnaire was used to face-to-face investigate. Results A total of 1 126 patients with femoral head necrosis were found, and the crude prevalence rate was 3.01‰. Among which, 714 were males, with a crude prevalence rate of 1.91‰, and 412 were females, with a crude prevalence rate of 1.10‰. The crude prevalence rate of age group of ≤14 years was 0.024‰, the crude prevalence rate of age group of 15-59 years was 1.76‰, and the crude prevalence rate of ≥60 years was 1.22‰. Multivariate Logistic regression analysis showed that family income>10,000 yuan （OR=0.504） was a protective factor for femoral head necrosis, while previous alcohol consumption （OR=2.597）, use of hormone drugs （OR=18.926） and family history of hip joint disease （OR=6.443） were risk foctors for femoral head necrosis. Conclusion The prevalence of femoral head necrosis in Taiqian county is relatively high, with more men than women, and it tends to occur in young adults. Femoral head necrosis is related to family income, previous alcohol consumption, use of hormone drugs, and family history of hip joint disease.

Key words: Femoral head necrosis, Prevalence, Case-control analysis, Influencing factor