The Hungarian National Cancer Registry (HNCR) was launched in August, 1999 by the National Cancer Institute. The main goal of HNCR is to determine the prevalence of different types of malignant cancers. A new method, period analysis was invented to determine survival chances of patients with malignant tumor. Based on period analysis we developed a new method by approximating survivals of Hungarian cancer patients with the help of Gompertz distribution. Our survival analysis was based on HNCR data of patients with cancer recognized between January 1, 2002 and December 31, 2005. These data are far enough from the time when HNCR started, thus they do not contain the initial errors, but also far enough from the present so their correction could be considered completed. In case of 21 malignant tumor locations for males and 23 ones for females we determined the parameters of the Gompertz distribution and based on the estimated parameters we estimated the expected survival probabilities for each specific tumor type and gender. In this study we have not used the TNM-based clinical stage or any other data of the patients contained by HNCR. Using the Gompertz model, the complete recovery of a cancer patient is always possible and the probability of recovery has a reliable estimate based on a short follow-up period only. We compared our results with five-year survival data of Canada, Italy, Norway and Finland and we did not find substantial differences. For both men and women, considering any specific location, the differences in survival among countries are much smaller than the difference between locations.
Eating disorders have a variety of medical complications, some of them being irreversible and dangerous, and significant psychiatric comorbidity. Eating disorders occur mainly in the female gender. Contradictory data are available concerning the time trends in the prevalence of eating disorders. Objective of the present study was to examine how the prevalence of eating disorder syndromes and their symptoms changed during a period of ten years. METHODS: The study carried out in 1989 (Túry et al, 1991; Szabó & Túry, 1991) was repeated in the 1998-1999 school year. The same questionnaire was used for the assessment of eating disorders in both studies. The questionnaire that included the Eating Attitudes Test, the Bulimia Cognitive Distortion Scale, and the Eating Behavior Severity Scale was distributed in 9 secondary schools in 6 towns. RESULTS: In all, 2731 students participated in the study (593 males and 2138 females, 932 in the first phase and 1799 in the second phase). The methods used for weight reduction and pathological questionnaire scores are more prevalent in female students. The prevalence of these eating-related pathological phenomena increased over a ten-year period. The prevalence of both clinical and subclinical anorexia and bulimia got significantly higher in the females during the study period (form 0.12% to 0.68%). CONCLUSIONS: The results of the study indicate that the prevalence of symptoms and syndromes of eating disorders has risen significantly among female Hungarian secondary school students during the study period. The increased prevalence rates are likely to be associated with the growing significance of physical appearance and the ideal of slenderness in this age group.