Prevalência de osteoporose: uma revisão crítica

O efeito da amamentação na massa óssea de mulheres na pós-menopausa: revisão sistemática de estudos observacionais

Objetivos:avaliar o efeito da amamentação na massa óssea de mulheres na pós-menopausa.Métodos:trata-se de revisão sistemática de estudos observacionais. A pesquisa da literatura foi realizada nas bases de dados bibliográficos Lilacs, Medline e Scopus, em junho de 2015, sem restrição quanto ao ano de publicação. Para ser incluído nesta revisão, o artigo deveria avaliar o histórico de amamentação e a massa óssea na pós-menopausa, sendo suas referências checadas para busca de novos estudos. Dois revisores, de forma independente, realizaram a extração de dados e a avaliação da suscetibilidade a vieses dos estudos.Resultados:foram selecionados 34 estudos, dos quais seis (26,5%) mostraram que a prática de amamentação aumentou significativamente a massa óssea e 15 (44%) encontraram o inverso. Constatou-se grande diversidade entre os estudos quanto à população de estudo, mensuração da exposição e sítios de avaliação da massa óssea, dificultando a comparabilidade entre os resultados.Conclusões:a marcante heterogeneidade dos estudos torna inconclusiva a direção da associação entre a amamentação e a massa óssea em mulheres na pós-menopausa, sendo necessários estudos com maior rigor metodológico para avaliar esse problema de grande relevância para as áreas clínica e de saúde pública.

Simplified Tai Chi Resistance Training versus Traditional Tai Chi in Slowing Bone Loss in Postmenopausal Women

Background. This study examined whether simplified Tai Chi resistance training is superior to traditional Tai Chi in slowing bone loss in postmenopausal women. Methods. This prospective trial included 119 postmenopausal women (age: 52–65 years). Subjects were randomly assigned to participate in a traditional Tai Chi program (TTC, n = 40), a simplified Tai Chi resistance training program (TCRT, n = 40), or a blank control group (routine activity, n = 39). The TTC involved traditional Yang Style Tai Chi. The primary outcome was the change of lumbar bone mass density (L2–L4) at 12 months over the baseline. Femoral neck and Ward's triangle were also measured using dual-energy X-ray absorptiometry. Results. The L2–L4 density was significantly lower at 12 months in comparison to the baseline in the blank control group. In both the TCRT and TTC groups, the L2–L4 density was comparable to the baseline. There was a trend for less bone loss in the TCRT than in the TTC group. Similar findings were observed with femoral neck and Ward's triangle. Conclusion. Simplified Tai Chi resistance training could slow bone loss in menopausal women. The results also suggested, but did not confirm, superiority to traditional Tai Chi.

[Preliminary comparison between phalangeal quantitative ultrassonography and bone densitometry for bone mass evaluation in adolescents]

OBJECTIVE

To evaluate the association between quantitative ultrasonography at hand phalanges (QUS) and dual energy X-ray absorptiometry (DXA), and between these methods with food intake and history of bone fractures.

SUBJECTS AND METHODS

After two years of follow up of 270 schoolchildren, 10 of them, who showed bone mass below - 2 SD in QUS, were included in the present study. Laboratory results and DXA data were analyzed.

RESULTS

Bone mass evaluated by DXA at L1-L4 ranged from -2.8 to -1.1 SDS, and whole body bone mass, from -2.9 to -1.2 SDS. Three children had history of non-pathological bone fractures. Dietary assessment showed low intake of calcium in 10 cases, of phosphorus in 6, and of vitamin D in 8 cases. There were no differences among the cases of bone mass below-2 SD in any of the three used methods. There was no association between history of bone fractures and food intake, and between these evaluations and bone mass.

CONCLUSION

In this small group of schoolchildren there was an association between the methods QUS and DXA. However, there was no association between bone mass and the history of bone fractures, or calcium, phosphorus and vitamin D intake.

Comparison of estimates for the self-reported chronic conditions among household survey and telephone survey--Campinas (SP), Brazil

OBJECTIVE

To compare the estimates obtained by different methods of population-based surveys for self-reported chronic conditions among adults living in Campinas in the year 2008.

METHODS

Data from ISACamp Survey, conducted by the Faculty of Medical Sciences from Universidade Estadual de Campinas (UNICAMP) with support from the County Health Department and VIGITEL (Campinas), a telephone survey conducted by the Brazilian Ministry of Health toward Surveillance of Risk and Protective Factors for Chronic non-communicable Diseases in the adult population (18 years and over) were analyzed. Estimates of self-reported hypertension, diabetes, osteoporosis, and asthma/bronchitis/emphysema were evaluated and compared by the independent (two-sample) Student's t-test.

RESULTS

For global estimates, a higher prevalence of hypertension and osteoporosis was ascertained by the telephone survey. Diabetes and asthma/bronchitis/emphysema results showed no statistically significant differences. According to sociodemographic variables, a higher prevalence of hypertension was obtained by VIGITEL for men, among people aged 18 to 59 years, and those who reported nine or more years of schooling. A higher prevalence of osteoporosis among adults (18 to 59 years) was verified by VIGITEL. Concerning asthma/bronchitis/emphysema in the elderly, ISACamp survey showed a higher prevalence.

CONCLUSION

Except for the hypertension prevalence, the telephone survey has proven to be a rapid alternative to provide global prevalence estimates of health conditions in the adult population of Campinas.

Prevalence of falls and associated factors in elderly individuals

OBJECTIVE

To estimate the prevalence of falls in elderly individuals and to analyze associated factors.

METHODS

Cross-sectional study with 420 elderly subjects (aged 60 years or older) living in the city of Juiz de Fora (Southeastern Brazil) in 2010. A household survey was conducted and the occurrence of falls in the 12 previous months was described. For the analysis of factors associated with the outcome, a theoretical determination model with three hierarchical blocks was built. The variables were adjusted among each other within each block; those with level of significance < 0.20 were included in the Poisson regression model and adjusted to the immediately higher level, with 5% significance level.

RESULTS

The prevalence of falls among the elderly was 32.1% (95%CI: 27.7; 36.9). Among those who experienced falls, 53% had a single fall and 19% had fractures as a consequence. Most of the falls (59%) occurred at the elderly person's home. The occurrence of falls was associated with old age, female sex, need of help for locomotion and self-reported diagnosis of osteoporosis.

CONCLUSIONS

Falls are frequent among the elderly. Knowledge of the factors associated with the occurrence of this event can aid the development of prevention strategies and adequate health services.

Exercício físico no tratamento e prevenção de idosos com osteoporose: uma revisão sistemática

INTRODUÇÃO: A atividade física influencia a manutenção das atividades ósseas normais, e por este motivo vem sendo indicada no tratamento da osteoporose. OBJETIVO: Verificar na literatura científica a influência do exercício físico na prevenção e no tratamento da osteoporose em idosos. METODOLOGIA: A presente pesquisa foi sustentada através de revisão sistemática de literatura, com a utilização das bases de dado eletrônicas: LILACS, SciELO e PubMed. Foram utilizados os seguintes descritores na língua portuguesa: osteoporose, exercício físico, idosos, tratamento e prevenção, sendo estes utilizados para pesquisa nas bases LILACS e SciELO; e na língua inglesa, foram utilizados os seguintes: osteoporosis, physical exercise, elderly, prevention e treatment, sendo esta busca realizada na base de dados PubMed. Foram selecionados os resumos que apresentaram critérios iniciais de seleção. RESULTADOS: De um total de 203 artigos encontrados, 27 preencheram os critérios de inclusão e exclusão, sendo que 9 artigos se concentraram no tratamento, 16 na prevenção e 2 no tratamento e na prevenção. Os exercícios que mais se destacaram no tratamento da osteoporose foram os seguintes: exercícios de extensão isométrica de tronco, exercícios em cadeia cinética aberta, coordenação e equilíbrio. Já na prevenção, os mais evidenciados foram: exercícios físicos de alta intensidade, exercícios de alto impacto e exercícios aeróbios. CONCLUSÃO: Pode-se concluir que o exercício físico é dado como fator importante, tanto na prevenção quanto no tratamento do idoso acometido pela osteoporose, e que ele possui especificidades de acordo com o objetivo a ser alcançado.

[Factors associated with low bone mineral density among white women]

OBJECTIVE

To analyze whether the factors causing low bone mineral density among elderly women are the same as those observed in other age groups.

METHODS

A cross-sectional study was carried out on the medical records of a random sample of 413 white women seen at an imaging diagnostics service in a city of Southern Brazil, in 2003. Femoral bone mineral densities with adjustment using T-scores were used. The following variables were investigated: age, body mass index, tobacco smoking, alcohol consumption, milk consumption, physical activity and hormone replacement therapy. Univariate and multivariate unconditional logistic regression were used.

RESULTS

In the sample, 52.5% were up to 59 years old and 47.5% were 60 or over. The mean bone mineral density was 0.867 g/cm2 (SD=0.151) for the femoral neck. Significant age-adjusted values were obtained for physical activity (adjusted OR=0.47; 95% CI: 0.23;0.97), body mass index greater than or equal to 30.0 kg/m2 (adjusted OR=0.10; 95% CI: 0.05;0.21), alcohol consumption (adjusted OR=7.90; 95% CI: 2.17;28.75), low milk consumption (adjusted OR=3.29; 95% CI: 1.91;5.68) and hormone replacement (adjusted OR = 0.44; 95% CI: 0.21;0.90). Among the elderly women, body mass, milk consumption and physical activity were independent protection factors.

CONCLUSIONS

Advanced age, body mass, physical activity, milk and alcohol consumption were important factors in bone mass regulation. The influence of behavioral factors was maintained among the women of advanced aged, thus reinforcing the role of preventive measures in medical practice and public health promotion policies aimed at healthy aging.

AA, Acúrcio FDA. Treatment of postmenopausal osteoporosis in women: a systematic review

Osteoporosis, a typical disease of the elderly, has become a frequent and relevant public health problem. Several drugs are available for treatment of osteoporosis, some of which are currently dispensed by the Brazilian Unified National Health System. The objective of this study was to present a systematic review of drugs for treatment of osteoporosis, focusing on the adequacy of clinical protocols based on existing evidence in the scientific literature. We conducted a search for randomized clinical trials in PubMed and LILACS that presented results for bone mineral density, incidence of vertebral fractures, and adverse effects. 32 articles met the review's inclusion criteria. Bisphosphonates were reported to have consistently reduced the risk of vertebral fractures. Hormone replacement therapy showed positive outcomes, but its use has been found to increase the risk of cardiovascular disease and breast cancer. Teriparatide and monofluorophosphate also showed efficacy against osteoporosis. Calcium and vitamin D were given to patients as food supplements.