The purpose of the study is to estimate the prevalence of heavy menstrual bleeding (HMB) in females aged between 18 and 50 years old living in Bejing.
This study is an observational, cross-sectional study. A representative sample of 2800 eligible women with different occupations such as farmers, service providers, workers, professional specialists, students and civil servants will be recruited. A cluster sampling method with probability proportional to the distribution of occupation in women in Beijing will be used. Demographic data will be collected by questionnaire. Menstrual bleeding will be evaluated by Pictorial Blood loss Assessment Chart (PBAC). According to the international definition of HMB, a PBAC score more than 100 is considered as HMB.
Study Type
OBSERVATIONAL
Enrollment
2,455
Peking University Health Science Center
Beijing, China
Prevalence of HMB
Time frame: from date of inclusion until the end of the study currently planned (about 7 months)
Prevalence of HMB in different subgroups
Subgroups include groups with different age, occupations, education levels, fertility status, with/without combined gynecological diseases.
Time frame: from date of inclusion until the end of the study currently planned (about 7 months)
Identify risk factors associated with HMB
Identified HMB subjects will be assigned into the case group. Non-HMB subjects will be assigned into the control group. Logistic regression model will be carried out to analyze the associations between possible demographic factors and risk of HMB by calculating odds ratios (OR) with 95% confidence intervals (CIs).
Time frame: from date of inclusion until the end of the study currently planned (about 7 months)
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