[ survey of age at natural menopause according to determinants factors in Arak city in 2007]

ABSTRACT

Menopause is a natural period of life. It means the permanent cessation of menstruation and the end of reproductive period which occurs between 45-52 years old. It also serves as an indicator of population health as the occurrence of menopause indicates the increased risk for the onset of several chronic diseases. In this study, the mean age of natural menopause among women in Arak [Central Iran] was investigated, considering their reproductive and socio-economic-demographic factors and their health behaviors. This study was an observational cross-sectional study on a population base, carried out in 2007 year. Interviews and questionnaires were used for gathering data from 458 women resident in Arak city, who had undergone a natural menopause. Sampling was multistaged using postal zones and selecting samples in each zone. Data was analyzed using variance analysis, multiple regression, T and correlation coefficient tests. Findings showed that the mean age of menopause in our sample was 48.2 +/- 2.34 years [95% CI 47.98- 48.41] and its median was 49 years. The mean age of menopause in women who were never married was less than married women [P= 0.015]. Low income level [P= 0.003], having physical activity [P= 0.004], number of pregnancies [P<0.001], age of last pregnancy [P=0.026] and place of birth [P=0.003] were meaningfull factors in age of menopause. This phenomenon must be documented in Iran because of its strong link with mortality and morbidity of the growing number of women who are reaching advanced ages; whose one forth of life is after menopause. Therefore health education as the best way for changing their lifestyle is suggested