[Cardiovascular mortality predictors in the oldest old]

The association between serum lipids and risk of premature mortality in Latin America: a systematic review of population-based prospective cohort studies

OBJECTIVE

To synthetize the scientific evidence on the association between serum lipids and premature mortality in Latin America (LA).

METHODS

Five data bases were searched from inception without language restrictions: Embase, Medline, Global Health, Scopus and LILACS. Population-based studies following random sampling methods were identified. The exposure variable was lipid biomarkers (e.g., total, LDL- or HDL- cholesterol). The outcome was all-cause and cause-specific mortality. The risk of bias was assessed following the Newcastle-Ottawa criteria. Results were summarized qualitatively.

RESULTS

The initial search resulted in 264 abstracts, five (N = 27,903) were included for the synthesis. Three papers reported on the same study from Puerto Rico (baseline in 1965), one was from Brazil (1996) and one from Peru (2007). All reports analysed different exposure variables and used different risk estimates (relative risks, hazard ratios or odds ratios). None of the reviewed reports showed strong association between individual lipid biomarkers and all-cause or cardiovascular mortality.

CONCLUSION

The available evidence is outdated, inconsistently reported on several lipid biomarker definitions and used different methods to study the long-term mortality risk. These findings strongly support the need to better ascertain the mortality risk associated with lipid biomarkers in LA.

Overweight and Abdominal Obesity Association with All-Cause and Cardiovascular Mortality in the Elderly Aged 80 and Over: A Cohort Study

OBJECTIVE

To evaluate the association between overweight and abdominal obesity with all-cause and cardiovascular mortality in the elderly aged 80 and over.

DESIGN

A prospective cohort study.

SETTING

A population-based study of community-dwelling very elderly adults in a city in southern Brazil.

PARTICIPANTS

236 very elderly adults, number that represents 85% of the population aged 80 and over living in the city in the period (mean age 83.4 ± 3.2).

MEASUREMENTS

Overweight and abdominal obesity were assessed using recommended cut-off points for body mass index (BMI), waist circumference (WC), waist-hip ratio (WHR) and waist-height ratio (WHtR). The association between these anthropometric measurements and all-cause and cardiovascular mortality were independently estimated by Cox proportional hazards model. Kaplan-Meier was used to assess survival time.

RESULTS

Increased WC (>80cm F and >94cm M) and WHtR (>0.53 F and >0.52 M) were associated with lower all-cause mortality, but only WHtR remained associated even after controlling for residual confounding (HR 0.55 CI95% 0.36-0.84; p<0.001). Additionally increased WC was independently associated with lower mortality from cardiovascular diseases (HR 0.57 CI95% 0.34-0.95; p<0.030). BMI and WHR did not show significant independent association with mortality in the main analysis.

CONCLUSION

Greater abdominal fat accumulation, as estimated by WC and WHtR, presented an association with lower allcause and cardiovascular mortality in the elderly aged 80 and over, but not by BMI and WHR.

Are 30 minutes of rest between two incremental shuttle walking tests enough for cardiovascular variables and perceived exertion to return to baseline values?

Objective:

To verify whether 30 minutes of rest between two incremental shuttle walking tests (ISWT) are enough for cardiovascular variables and perceived exertion to return to baseline values in healthy subjects in a broad age range.

Method:

The maximal exercise capacity of 334 apparently healthy subjects (age ≥18) was evaluated using the ISWT. The test was performed twice with 30 minutes of rest in between. Heart rate (HR), arterial blood pressure (ABP), dyspnea, and leg fatigue were evaluated before and after each test. Subjects were allocated to 6 groups according to their age: G1: 18-29 years; G2: 30-39 years; G3: 40-49 years; G4: 50-59 years; G5: 60-69 years and G6: ≥70 years.

Results:

All groups had a good performance in the ISWT (median >90% of the predicted distance). The initial HR (HRi) of the second ISWT was higher than the first ISWT in the total sample (p<0.0001), as well as in all groups (p<0.0001). No difference was observed in the behavior of ABP (systolic and diastolic) and dyspnea between the two tests, but this difference occurred for leg fatigue (greater before the second ISWT) in G1 (p<0.05). Most subjects (58%) performed better in the second test.

Conclusion:

30 minutes of rest between two ISWTs are not enough for all cardiovascular variables and perceived exertion to return to baseline values. However, this period appears to be sufficient for blood pressure and performance to recover in most subjects.

Percepção dos idosos jovens e longevos gaúchos quanto aos espaços públicos em que vivem

Em 2050, o número de brasileiros residindo em áreas urbanas passará dos 200 milhões e 29% da população será composta por idosos. Os idosos longevos possuem 80 anos ou mais, os idosos jovens são aqueles que apresentam idade entre 60 e 79 anos. O objetivo foi verificar a diferença da percepção de idosos jovens e longevos do Rio Grande do Sul quanto ao ambiente urbano em que vivem. Estudo de base populacional, observacional, descritivo, retrospectivo, com paradigma de análise quantitativa, analisou dados da pesquisa Perfil dos Idosos do RS, realizado pelo Instituto de Geriatria e Gerontologia da PUCRS em parceria com a Escola de Saúde Pública do RS. A amostra foi composta por 6913 questionários respondidos por idosos de 59 cidades. A análise dos dados foi realizada com cada um dos grupos etários e as variáveis independentes foram testadas pelo Qui-Quadrado, sendo o nível de significância menor que 0,05. Como resultado, a percepção de dificuldades, como poucos bancos, falta de faixas de segurança, tempo de sinal muito curto para pedestres, degraus muito altos e mau cheiro dos banheiros públicos, foi maior entre os idosos jovens. Os idosos longevos perceberam menos esses fatores, porém, referiram que frequentam menos os ambientes comunitários.

Contributory factors for the functional independence of oldest old

OBJECTIVE To investigate the socioeconomic and clinical factors that contribute to the functional independence of the oldest old of a community. METHOD Cross-sectional quantitative study whose sample consisted of 214 elderly people registered in Basic Health Units. Data were collected through structured interviews and application of the Functional Independence Measure. We used descriptive statistics, and for association of the variables we used the Student t-test, ANOVA and Tukey's test for multiple comparisons. RESULTS The significant variables that contributed to the functional independence were remaining economically active, practicing physical and leisure activities, having a social life, eating fruits, vegetables and meat. The orientation to conduct these practices reduces the demand for care and help needed in everyday activities. CONCLUSION Maintaining independence is primordial to delay disability and presents itself as an excellent field of work for nursing.

Prevalence and factors associated with Metabolic Syndrome in elderly users of the Unified Health System

OBJECTIVE: To evaluate the prevalence and factors associated with metabolic syndrome in the elderly. METHODS: Cross-sectional study, with 133 individuals randomly selected in the Unified Health System in Goiania, Goiás. The following variables were researched: anthropometric (BMI, waist circumference, fat percentage by Dual X-ray absorptiometry), sociodemographic (gender, age, color, income, marital status and years of schooling), lifestyle (physical activity, smoking and risk alcohol consumption) and food intake (risk and protective foods). The metabolic syndrome was assessed according to harmonized criteria proposed by the World Health Organization (WHO). The combinations were tested by Poisson regression for confounding factors. RESULTS: The prevalence of metabolic syndrome was 58.65% (95%CI 49.8 - 67.1), with 60.5% (95%CI 49.01 - 71.18) for females and 55.7% (95%CI 41.33 - 69.53) for males. Hypertension was the most prevalent component of the syndrome in both men, with 80.8% (95%CI 64.5 - 90.4), and women, with 85.2% (95%CI 75.5 - 92.1). After the multivariate analysis, only the excess of weight measured by body mass index (prevalence ratio = 1.66; p < 0.01) remained associated with the metabolic syndrome. CONCLUSIONS: The prevalence of metabolic syndrome in this sample was high, indicating the need for systematic actions by health workers in the control of risk factors through prevention strategies and comprehensive care to the elderly.

Collective efficacy and depressive symptoms in Brazilian elderly

The objective was to investigate the association between depressive symptoms and collective efficacy among the elderly in a municipality in southern Brazil. A cross-sectional population-based design was carried out. Structured interviews were held at the homes of 1007 elderly individuals. The presence of depressive symptoms was measured using the Geriatric Depression Scale, exposures were a standard 8-item collective efficacy scale and a single item about elderly participation in groups. Data were analyzed using Poisson regression to obtain the crude and adjusted prevalence ratios (PRs). The sample consisted mostly of female (63%), white (96%) and married (64%) elderly individuals. The mean age, income and educational level were, respectively: 73 years (SD=4), R$ 1836 (SD=2170) and 5 years of education (SD=4). After controlling for demographic, socioeconomic, behavioral and health-related variables, participants who reported low collective efficacy at the places where they lived presented a prevalence of depressive symptoms that was twice as high as the prevalence among those who reported high collective efficacy. In the same way, elderly individuals who did not participate in groups presented prevalence of the outcome around 64% higher than among those who took part in one or more groups. The study suggests that creation of and participation in social networks and community groups may be an important strategy for promoting mental health among the elderly.

Risk factors for cardiovascular disease in the very elderly: results of a cohort study in a city in southern Brazil

BACKGROUND

Risk factors for cardiovascular mortality have barely been investigated in very elderly persons and there may be differences compared with younger individuals.

METHODS

This is a cohort study of all inhabitants over 80 years of age in the city of Veranópolis, Brazil. The association of demographic, anthropometric, physical, and medical characteristics with mortality by any cause and by cardiovascular disease (CVD) was investigated by means of Cox regression models.

RESULTS

The mean age of the participants was 83.6 ± 3.3 years. Vital status and cause of death was ascertained in 96.9% of the participants after a mean follow-up of 8.7 ± 3.8 years. Systolic and diastolic blood pressure showed a U-shape relationship with cardiovascular and total mortality. Blood pressure lower than 140/90 mmHg was associated with a higher risk for cardiovascular mortality (HR 4.76, 95% CI 1.56-14.28, p = 0.006). Duration of sleep was inversely associated with the risk of cardiovascular death (HR 0.83, 95% CI 0.73-0.95, p = 0.007), while apoA-I was inversely associated only with the risk of all-cause mortality (HR 0.99, 95% CI 0.98-1.00, p = 0.041). Anthropometric indexes, smoking, cholesterol, LDL-cholesterol, HDL-cholesterol, and other traditional risk factors were not associated with cardiovascular mortality.

CONCLUSION

Many traditional risk factors are not associated with cardiovascular mortality in the very elderly. Longer sleep duration is associated with lower cardiovascular mortality of very elderly individuals, while low blood pressure identifies very elderly individuals at higher risk of dying from cardiovascular causes.

Estudo da mortalidade em população idosa de municipios do Rio Grande do Sul no período de 1996 a 2004

Estima-se que, no Brasil, a população com 60 anos ou mais será em torno de 34 milhões em 2025. O idoso vivencia em seu processo de envelhecimento uma série de alterações, que proporcionam o aparecimento de uma série de doenças que podem conduzi-lo ao óbito. Diante de tal realidade, o objetivo deste estudo foi analisar a evolução na taxa de mortalidade em idosos de municípios do interior do estado do Rio Grande do Sul, no período de 1996 a 2004, levando em consideração as faixas etárias e as diferenças entre os gêneros neste período, além de identificar as principais causas de óbitos. Dos resultados encontrados, podemos salientar que as doenças do aparelho circulatório apresentaram as taxas mais elevadas, seguidas pelas doenças do aparelho respiratório e neoplasias. Entre os gêneros, o diabetes mellitus apresenta maior prevalência entre as mulheres. Com relação à idade, as maiores taxas se encontram na população com mais de 80 anos.

Implications of statin adverse effects in the elderly

The elderly differ from younger people in the relation of cholesterol to heart disease and mortality. Clinical trial evidence supports epidemiological findings in showing that high cholesterol weakens in its relationship to heart disease with age and loses (and in older age reverses) its relation to mortality. Randomised trial data confirm that lowering cholesterol no longer extends life in the elderly, even those at high risk of heart disease, and no evidence supports the presumption that the impact on all-cause morbidity is any more favourable. These findings increase the importance of statin adverse effects (AEs) in this group. Furthermore, the elderly may be more vulnerable to known AEs, and evidence provides cause for concern that new risks may supervene, including cancer, neurodegenerative disease and heart failure. Physiological evidence regarding the impact of statins on mitochondrial function, and mitochondrial function on ageing, support these concerns. Additionally, the impact of statin AEs (e.g., muscle and cognitive problems) may be amplified in this group. Effects may be misattributed to ageing. Even modestly lower cognitive and physical function in older elderly prognosticates increased disability, hospitalisation, institutionalisation, and mortality. Disability, once present, is less likely to recover. Because the risk for AEs is unattended by evidence of net benefit to the person, the use of statins in the elderly should be undertaken, if at all, with circumspection and close scrutiny for adverse effects.

[Relationship between body mass index, waist circumference, and waist-to-hip ratio and mortality in elderly women: a 5-year follow-up study]

This study examines the association between body mass index (BMI), waist-to-hip ratio (WHR), and waist circumference (WC) and all-cause and cardiovascular mortality in elderly women in a 5-year longitudinal study of 575 female outpatients 60 years and over. The highest BMI, WHR, and WC quartiles and predefined BMI categories were analyzed as predictive variables. Death occurred in 88 (15.4%). Underweight (BMI < 18.5 kg/m2) was associated with all-cause mortality in uni- and multivariate analyses, regardless of age bracket. The survival curves and univariate analysis showed that the highest WHR quartile (> or = 0.97) was associated with all-cause mortality. However, after adjustment for age, smoking, and previous cardiovascular diseases, the increase in WHR was positively associated only in women from 60 to 80 years of age. None of the anthropometric measurements was associated with cardiovascular mortality. The results indicate that underweight and increased waist-to-hip ratio were predictors of all-cause mortality in elderly women, mainly among those under 80 years.

[Health status, physical functioning, health services utilization, and expenditures on medicines among Brazilian elderly: a descriptive study using data from the National Household Survey]

The objective of this research was to describe health conditions and health services utilization among Brazilian seniors. The study was based on 28,943 adults > 60 years (99.9%) from an overall National Household Survey (PNAD 1998). The results show that prevalence rates for at least one chronic disease (69.0%), hypertension (43.9%), arthritis (37.5%), and inability to feed oneself/bathe/use the toilet (2.0%) are very similar to those observed in other populations. Physician visits and hospitalization patterns are within the variation reported by different countries. The low prevalence rates of older adults who had interrupted activities because of a health problem (13.9%) or had been bedridden (9.5%) in the previous 2 weeks or hospitalized in the previous year (13.6%) show that the vast majority are not subject to these events. Considering that 50% of this population live on less than or equal to one Brazilian monthly minimum wage, expenditures on medications consume approximately one-fourth (23%) of total income for half of the elderly population.