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Background: Climacteric stage women experience significant biological, psychological and social changes. With demographic changes being observed in the growing number of climacteric stage women in Mexico, it is important to improve their knowledge about the climacteric stage and its potential associated problems, encourage their participation in screening programs, and promote the acquisition of healthy lifestyles.
At Mexican health care institutions the predominant health care model for climacteric stage women has a biomedical perspective. Medical doctors provide mostly curative services and have limited support from other health professionals. This study aims to design an integrative health care model (IHCM: bio-psycho-social, multidisciplinary and women-centered) applicable in primary care services aimed at climacteric stage women.
Methods: A field trial with one intervention and one comparison group, with ex ante and ex post measurements will be conducted in two IMSS primary care clinics in Mexico City. The clinics will be selected for convenience; each clinic must have more than 20 family doctors' offices and available space for the intervention (consulting room and an area for group counseling) and should have accepted to participate in the study; The intervention will be conducted in one clinic and the other clinic will serve as a comparison group, where the usual care for climacteric stage women will be observed.
The study population will consist of women affiliated with IMSS, between 45 and 59 years of age with a maximum of 5 years after menopause. The women should be users of the clinic, and should not have mental conditions that would prevent them from understanding the information or from taking independent decisions (dementia, mental retardation or psychosis), a physical disability that would impede them from participating (hearing loss, diseases affecting physical mobility as severe forms of rheumatoid arthritis), medical diagnosis of depression, diabetes mellitus, hypertension, renal or liver failure, and/or cancer, because patients with these diseases require specific care provided by several specialists. All women must agree to participate in the study through written informed consent.
The IHCM consists of collaborative and coordinated provision of services by a health team, which is involves a family doctor, nurse, psychologist, and the woman herself. The health team promotes the empowerment of women through individual and group counseling on the climacteric stage and health related self-care. The intervention lasts three months followed by a three-month follow-up period to evaluate the effectiveness of the model. The effectiveness of the model will be evaluated through the following aspects: health-related quality of life (HR-QoL), empowerment, self-efficacy and knowledge regarding the climacteric stage and health-related self-care activities, use of screening services, and improvement in lifestyles (regular leisure time, physical activity and healthy diet).
The sample size for the primary outcome (HR-QoL) was estimated by using the formula to test change in the mean of two normally distributed samples in longitudinal studies. An average increase of at least 10 points in one or more domains of WHQ23 in the intervention group compared with control group women was considered to be clinically relevant. The assumptions included: a mean HR-QoL score of 64.9 points (standard deviation of 23.4 points) in the domain of general well-being, a= 0.05 ( for one-sided hypothesis) and ß = 0.20. The number of women by group, assuming a drop-out rate of 20% will be 107.
We also estimated a sample size for regular leisure time physical activity considering that this is the outcome variable more difficult to achieve. It was assumed that only 17% of women in Mexico engaged in some type of regular leisure time physical activity and a positive increase of at least 10% will be achieved after women participation in the IHCM. For this calculation, we used the formula to test the difference of proportions between two populations with a= 0.05 (one side) and the power of 80%. The total number of women by group to include assuming a drop-out rate of 20% will be 207.
Discussion: Participation in preventive activities should be encouraged among women in Mexico. Designing and evaluating the effectiveness of an integrative health care model for women at the climacteric stage, based on the empowerment approach and focus on health-related self-care to improve their HR-QoL is pertinent for current health conditions of this age group.
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