To assess the prognostic factors of the femoral neck fractures in patients with CVA, we compared the survival rates in 12 cases of CVA group with 12 cases of non-CVA group and evaluated the various clinical factors of CVA group affect the mortality. All of the patients both CVA group and non- CVA group were treated hemiarthroplasty for femoral neck fractures between June 1990 and June 1992. The mean age was 68.9 years old in the CVA group and 69.3 years old in the non-CVA group. The mean follow-up periods were 32.8 months in the CVA group and 33.6 months in the non-CVA group. The results were as follows; 1. The incidence of the femoral neck fracture with CVA was 15%(12 cases among SO femoral neck fractures). 2. The survival rates in the CVA group at l-year, 2-year, and 3-year were 83.3%, 66.7%, and 58.3% respectively. In the non-CVA group, the survival rates were 83.3%, 75.0%, and 62.5%. 3. In the CVA group, serum total protein, nutritional index, hypertension, lung disease, and cardiac disease may be valuable prognostic factors. In conclusion, the pretraumatic patient's general physical condition could affect the mortality of femoral neck fracture in the CVA patients rather than CVA itself or postoperative status.