[An analysis of factors influential in improving the survival rate of patients with ovarian cancer].

[OBJECTIVES OF STUDY] This presentation deals with an analysis of factors to improve the survival of patients with ovarian cancer. Some 1051 patients with malignant ovarian tumors who were treated in this group, were divided into two groups for their period of treatment. Of these, 460 patients were treated 1974-1979 (retrospective group) and 591 patients treated 1979-1984, (prospective group) because chemo-immunotherapy was determined by a certain protocol in the group. [RESULTS] The survival rate of the two groups were compared, and the 5-year survival rate of prospective group was 20% higher than in the retrospective group. However, there were no significant differences of any clinical stages between retrospective group and prospective group, and the difference in 5-year survival rate was about 20% in any stages. The survival rate was also compared in accordance with histological types. The most dominant progression was seen in serous adenocarcinoma and when the cases were divided into two groups by their clinical stage; one was the early stage (Stage I) cases. The 5-year survival rate of serous ca, mucinous ca and embryonal ca (Higuchi, Kato) made remarkable progress in recent several years, but, mesonephroid ca made little progress. The other was the late stage (stage II, III, IV) cases, patients with mucinous ca when she had had surgery recurrently on relapse, resulting in prolonged survival period. As to the comparison of age groups, younger patients less than 40 years old showed a progression in their survival period, whereas patients in their sixties had no such progression. In order to evaluate the effect of treatment with due comparable counterpart of ovarian carcinoma, cases were quantified with 3 years survival prediction score which was calculated retrospectively by multivariate statistical analysis. The first evaluation was done with an MFC combination chemotherapy and a CAP combination. The results indicated that a CAP combination had improved the survival rate of ovarian cancer, and statistically significant differences were proved. Z value was 2.24 and P value was less than 5%. The second evaluation was done on the significance of second look operation. The prediction score of patients who underwent second look operation and matched pair control of prediction score without reoperation, were compared. The results indicated that second look operation improved the survival rate of ovarian cancer with statistically significant differences. Z value was 2.37 and P value was less than 5%. [CONCLUSION] According to the present study, the treatment of malignant ovarian tumors showed an improved survival rate of about 20%, regardless of the cl