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James D Neaton

Publications and source records attributed to James D Neaton.

At least 19 recordsLinked to original sources

Blood pressure and risk of death from external causes among men screened for the Multiple Risk Factor Intervention Trial.

A few epidemiologic studies have shown an increased risk of death from external causes among men with hypertension. Previous studies were limited by small numbers of events, however, and none assessed the association of blood pressure with specific types of "accidental" death. The authors examined data obtained from baseline interviews and 25 years of mortality follow-up (1973-1999) for 347,978 men screened for the US Multiple Risk Factor Intervention Trial. Proportional hazards regression analyses were used to quantify associations of blood pressure with all external causes of death and individual causes. There were 3,910 deaths from external causes, including 2,313 unintentional injuries, 1,248 suicides, and 349 homicides. Compared with those for men whose blood pressure status was "normal" according to the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure, the multivariate-adjusted hazard ratios and 95% confidence intervals for death from external causes among men with prehypertension, stage 1 hypertension, and stage 2 hypertension were 0.91 (95% confidence interval (CI): 0.83, 1.00), 1.06 (95% CI: 0.96, 1.16), and 1.44 (95% CI: 1.28, 1.62), respectively. Men with stage 2 hypertension had multivariate-adjusted hazard ratios of 1.90 for falls (95% CI: 1.32, 2.74), 1.45 for motor vehicle injuries (95% CI: 1.14, 1.85), 1.33 for other "accidents" (95% CI: 1.06, 1.66), 1.40 for suicide (95% CI: 1.13, 1.73), and 1.35 for homicide (95% CI: 0.92, 1.97). For men, hypertension may signal an increased risk of death from external causes.

Accidental Falls↗

Lipoprotein particles, insulin, adiponectin, C-reactive protein and risk of coronary heart disease among men with metabolic syndrome.

We tested the hypotheses whether nuclear magnetic resonance (NMR) determined lipoprotein particles, insulin and adiponectin, and C-reactive protein (CRP) and white blood cell (WBC) count as markers of inflammation predicted risk of coronary heart disease (CHD) death among 428 men age 35-57 years with metabolic syndrome (MetSyn) in a matched case control study within the multiple risk factor intervention trial. Blood samples collected at entry into the study and stored at -60 degrees C were obtained from central storage for blood analyte analysis. Two hundred and fourteen men with MetSyn who died of CHD were matched with 214 men with MetSyn who did not die of CHD during 18 years of follow-up. Cases were matched to controls on age, study group, number of factors present in the MetSyn, and presence or absence of a nonfatal CVD event during the trial. Mortality follow-up was determined using the National Death Index. Higher levels of high density lipoprotein particles (HDL-P), especially medium-sized HDL-P [hazard ratio (95% confidence interval) 0.45 (0.25-0.83, P<0.01), quartile 1 as compared to quartile 4], were associated with lower risk of CHD death. Low density lipoprotein (LDL) particles were not associated with increased risk of CHD. Elevated LDL cholesterol (LDL-C), smoking and WBC count were, but levels of adiponectin, insulin and CRP were not significantly related to CHD death. In multivariate models adjusting for smoking and LDL-C, medium HDL-P and WBC count remained independent predictors of CHD death. Number of HDL particles, especially medium-sized HDL particles and WBC count were independent predictors of CHD death among men with MetSyn.

Adiponectin↗

ZIP-code-based versus tract-based income measures as long-term risk-adjusted mortality predictors.

There is a well-established, strong association between socioeconomic position and mortality. Public health mortality analyses thus routinely consider the confounding effect of socioeconomic position when possible. Particularly in the absence of personally reported data, researchers often use area-based measures to estimate the effects of socioeconomic position. Data are limited regarding the relative merits of measures based on US Census tract versus ZIP code (postal code). ZIP-code measures have more within-unit variation but are also more easily obtained. The current study reports on 293,138 middle-aged men screened in 14 states in 1973-1975 for the Multiple Risk Factor Intervention Trial and having 25-year mortality follow-up. In risk-adjusted proportional hazards models containing either ZIP-code-based or tract-based median household income, all-cause mortality hazard ratios were 1.16 (95% confidence interval: 1.14, 1.17) per Dollars 10,000 less ZIP-code-based income and 1.15 (95% confidence interval: 1.13, 1.16) per Dollars 10,000 less tract-based income; adding either income variable to a risk-adjusted model improved model fit substantially. Both were significant independent predictors in a combined model; tract-based income was a slightly stronger mortality predictor (hazard ratios = 1.05 and 1.11 for ZIP-code-based and tract-based income, respectively). These patterns held across various causes of death, for both Blacks and non-Blacks, and with or without adjustment for ZIP-code-based income diversity or tract-based proportion below poverty.

Analysis of Variance↗

Association of single measurements of dipstick proteinuria, estimated glomerular filtration rate, and hematocrit with 25-year incidence of end-stage renal disease in the multiple risk factor intervention trial.

The incidence of ESRD is increasing rapidly. Limited information exists regarding early markers for the development of ESRD. This study aimed to determine over 25 yr the risk for ESRD associated with proteinuria, estimated GFR (eGFR), and hematocrit in men who did not have identified kidney disease and were randomly assigned into the Multiple Risk Factor Intervention Study (MRFIT). A total of 12,866 men who were at high risk for heart disease were enrolled (1973 to 1975) and followed through 1999. Renal replacement therapy was ascertained by matching identifiers with the United States Renal Data System's data; vital status was from the National Death Index. Men who initiated renal replacement therapy or died as a result of kidney disease were deemed to have developed ESRD. Dipstick urine for proteinuria, eGFR, and hematocrit were related to development of ESRD. During 25 yr, 213 (1.7%) men developed ESRD. Predictors of ESRD were dipstick proteinuria of 1+ or > or =2+ (hazard ratio [HR] 3.1 [95% confidence interval (CI) 1.8 to 5.4] and 15.7 [95% CI 10.3 to 23.9] respectively) and an eGFR of <60 ml/min per 1.73 m(2) (HR 2.4; 95% CI 1.5 to 3.8). Correlation between eGFR and serum creatinine was 0.9; the risk for ESRD with a 1-SD difference of each was identical (HR 1.21). Bivariate analysis demonstrated a 41-fold increase in ESRD risk in those with an eGFR <60 ml/min per 1.73 m(2) and > or =2+ proteinuria (95% CI 15.2 to 71.1). There was no association between hematocrit and ESRD. Other baseline measures that independently predicted ESRD included age, cigarette smoking, BP, low HDL cholesterol, and fasting glucose. Among middle-aged men who were at high risk for cardiovascular disease but had no clinical evidence of cardiovascular disease or significant kidney disease, dipstick proteinuria and an eGFR value <60 ml/min per 1.73 m(2) were strong predictors of long-term development of ESRD. It remains unknown whether intervention for proteinuria or early identification of those with chronic kidney disease reduces the risk for ESRD.

Adult↗

Metabolic syndrome: risk factor distribution and 18-year mortality in the multiple risk factor intervention trial.

OBJECTIVE: To examine the long-term association of metabolic syndrome with mortality among those at high risk for cardiovascular disease (CVD). RESEARCH DESIGN AND METHODS: A total of 10,950 Multiple Risk Factor Intervention Trial (MRFIT) survivors were followed for mortality an additional median 18.4 years (1980-1999). Proportional hazards models examined multivariate-adjusted risks associated with Adult Treatment Panel III-defined metabolic syndrome conditions, with BMI substituted for waist circumference. RESULTS: At MRFIT annual visit 6, 4,588 (41.9%) men, mean age (+/-SD) 53.0 +/- 5.9 years, had metabolic syndrome and 6,362 did not. Comparing men with metabolic syndrome to men without, adjusted hazard ratios (HRs) were 1.21 (95% CI 1.13-1.29), 1.49 (1.35-1.64), and 1.51 (1.34-1.70) for 18-year total, CVD, and coronary heart disease mortality, respectively. Among men with metabolic syndrome, elevated glucose (1.54 [1.34-1.78]) and low HDL cholesterol (1.45 [1.17-1.54]) were most predictive of CVD mortality, followed by elevated BMI (1.34 [1.17-1.54]), elevated blood pressure (1.25 [0.98-1.58]), and elevated triglycerides (1.06 [0.86-1.30]). In contrast, for men without metabolic syndrome, the HR for low HDL cholesterol was 1.02 (0.86-1.22). Among metabolic syndrome men with no nonfatal CVD event, smokers with elevated LDL cholesterol showed higher CVD mortality (1.79 [1.22-2.63]) compared with nonsmokers without elevated LDL cholesterol; this additional risk was even greater for metabolic syndrome men with a nonfatal CVD event (2.11 [1.32-3.38]). CONCLUSIONS: Metabolic syndrome is associated with an increased risk of mortality. Among those with metabolic syndrome, risk is further increased by having more metabolic syndrome conditions, by cigarette smoking, and by elevated LDL cholesterol. Primary prevention of each metabolic syndrome condition should be emphasized, and presence of each condition should be treated in accordance with current guidelines.

Body Mass Index↗

Prevention of mother to child HIV transmission.

We describe the impact of strategies to reduce HIV-1 vertical transmission on a cohort of pregnant women and evaluate toxicity related to antiretroviral (ARV) therapy and prevalence of birth defects. In this observational, retrospective, longitudinal and descriptive study, we have reviewed the data base and clinical charts from a cohort of 351 pregnant women with HIV infection admitted to a public hospital in Buenos Aires from April 1994 to August 2003. Eighty percent of women were infected by sexual transmission. Diagnosis of HIV infection was performed before pregnancy in 38.5% of cases; 241 patients received some kind of ARV therapy, combined therapy was administered in 123 of cases. The overall transmission rate was 9.6%, and antiretroviral therapy was the most significant factor associated with the transmission rate. HIV transmission odds were 0.04 for any ARV treatment versus no therapy. No cases of HIV transmission were observed among women given combination ARV therapy. More prevalent secondary effects associated to ARV therapy were anemia, hypercholesterolemia, increase of ALP and hypertrigliceridemia. In conclusion, antiretroviral therapy, particularly combined ARV therapy, irrespective of type of delivery, was associated with a reduced risk of HIV transmission without an increase in toxicity or incidence of congenital abnormalities in the short-term.

Adolescent↗

CD4(+) cell count increase predicts clinical benefits in patients with advanced HIV disease and persistent viremia after 1 year of combination antiretroviral therapy.

The relationship between 12-month CD4(+) cell count response and clinical outcome (AIDS-defining event or death) in a subset of 228 patients with a human immunodeficiency virus load >400 copies/mL despite receiving combination antiretroviral therapy as part of a larger randomized trial was defined by use of Cox models. The 12-month CD4(+) cell count responses were divided into 5 categories, ranging from decrease or no change (29% of patients) to a > or =100-cell/mm(3) increase (27% of patients). There was a lower risk of clinical progression for each incremental increase in CD4(+) cell count response. A 25-cell/mm(3) increase in CD4(+) cell count was associated with a 21% reduction in the risk of an AIDS-defining event or death (P<.0001).

Antiretroviral Therapy, Highly Active↗

Latino risk-adjusted mortality in the men screened for the Multiple Risk Factor Intervention Trial.

Latinos are now the largest minority in the United States, but their distinctive health needs and mortality patterns remain poorly understood. Proportional hazards regressions were used to compare Latino versus White risk- and income-adjusted mortality over 25 years' follow-up from 5,846 Latino and 300,647 White men screened for the Multiple Risk Factor Intervention Trial. Men were aged 35-57 years and residing in 14 states when screened in 1973-1975. Data on coronary heart disease risk factors, self-reported race/ethnicity, and home addresses were obtained at baseline; income was estimated by linking addresses to census data. Mortality follow-up through 1999 was obtained using the National Death Index. The fully adjusted Latino/White hazard ratio for all-cause mortality was 0.82 (95% confidence interval (CI): 0.77, 0.87), based on 1,085 Latino and 73,807 White deaths; this pattern prevailed over time and across states (thus, likely across Latino subgroups). Hazard ratios were significantly greater than one for stroke (hazard ratio = 1.30, 95% CI: 1.01, 1.68), liver cancer (hazard ratio = 2.02, 95% CI: 1.21, 3.37), and infection (hazard ratio = 1.69, 95% CI: 1.24, 2.32). A substudy found only minor racial/ethnic differences in the quality of Social Security numbers, birth dates, soundex-adjusted names, and National Death Index searches. Results were not likely an artifact of return migration or incomplete mortality data.

Adult↗

Race/ethnicity, income, major risk factors, and cardiovascular disease mortality.

OBJECTIVES: We explored differences between Black and White men for cardiovascular disease (CVD) mortality across major risk factor levels. METHODS: Major CVD risk factors were measured among 300,647 White and 20,223 Black men aged 35 to 57 years who were screened for the Multiple Risk Factor Intervention Trial (MRFIT). Hazard ratios for CVD deaths for Black and White men over 25 years of follow-up were calculated for subgroups stratified according to risk factor levels. RESULTS: CVD was responsible for 2518 deaths among Black men and 30,772 deaths among White men. The age-adjusted Black-to-White CVD hazard ratio was 1.35 (95% confidence interval [CI]=1.29, 1.40); the risk- and income-adjusted ratio was 1.05 (95% CI=1.01, 1.10). CVD mortality rates were dramatically lower in cases of favorable risk profiles. However, fully adjusted Black-to-White CVD hazard ratios within groups at low, intermediate, high, and very high levels of overall risk were 1.76, 1.20, 1.10, and 0.94, respectively. Similar gradients were evident for individual risk factors. CONCLUSIONS: Higher CVD mortality rates among Black men were largely mediated by risk factors and income. These data underscore the need for sustained primordial risk factor prevention among Black men.

Adult↗

Incidence of type 2 diabetes in the randomized multiple risk factor intervention trial.

BACKGROUND: Weight loss and increased physical exercise reduce the risk for diabetes in people with impaired glucose tolerance. Randomized trial evidence on the effect of these interventions on people without impaired glucose tolerance is lacking. OBJECTIVE: To examine the influence of a comprehensive intervention program on the risk for developing diabetes in men without impaired glucose tolerance and in a post hoc subgroup analysis by baseline cigarette smoking status. DESIGN: Randomized, controlled trial. SETTING: 22 clinical centers for the Multiple Risk Factor Intervention Trial (MRFIT). PARTICIPANTS: 12,866 men age 35 to 57 years at risk for cardiovascular disease were randomly assigned to either a special intervention or usual care group and followed for 6 to 7 years; this report focuses on 11,827 men without diabetes or impaired glucose tolerance at entry for whom follow-up glucose measurements were available. MEASUREMENTS: Cardiovascular disease risk factors, fasting blood glucose levels, and diabetes medication history were assessed before randomization and annually. INTERVENTION: Men in the special intervention group were counseled to change diet (reduce saturated fat, cholesterol, and calorie intake), to stop smoking, and to increase physical activity. Blood pressure was treated more intensively in the special intervention group than in the usual care group. RESULTS: 11.5% of the special intervention group and 10.8% of the usual care group developed diabetes over 6 years of follow-up (hazard ratio, 1.08 [95% CI, 0.96 to 1.20]). The special intervention-usual care hazard ratio for diabetes was 1.26 (CI, 1.10 to 1.45) among smokers (63%) and 0.82 (CI, 0.68 to 0.98) among nonsmokers (37%). These estimates differed significantly (P = 0.0003). Weight gain after smoking cessation and the use of antihypertensive drugs may have counterbalanced the beneficial effect of the lifestyle intervention for the special intervention group smokers, while the lifestyle intervention was beneficial among nonsmokers. LIMITATIONS: Principal findings are based on a post hoc subgroup analysis. CONCLUSIONS: In nonsmokers, an intervention program that included nutrition counseling to produce reductions in weight, serum cholesterol, and (along with antihypertensive medication) blood pressure reduced the risk for diabetes.

Adult↗

Evaluation of the association between initial proteinuria and morbidity rate or death in dogs with naturally occurring chronic renal failure.

OBJECTIVE: To determine whether urine protein-to-creatinine ratio (UP:C) > or = 1.0 at initial diagnosis of chronic renal failure (CRF) is associated with greater risk of development of uremic crises, death, and progression of renal failure in dogs. DESIGN: Prospective cohort study. ANIMALS: 45 dogs with CRF PROCEDURE: Dogs were prospectively assigned to 2 groups on the basis of initial UP:C < 1.0 or 2 > or = 1.0. The association between magnitude of proteinuria and development of uremic crises and death was determined before and after dogs with initial UP:C > or =1.0 were assigned to 3 subgroups and compared with dogs with initial UP:C < 1.0. Changes in reciprocal serum creatinine concentration were used to estimate decrease in renal function. RESULTS: Initially, dogs had similar clinical characteristics with the exception of systolic blood pressure and UP:C. Relative risks of development of uremic crises and death were approximately 3 times higher in dogs with UP:C > or =1.0, compared with dogs with UP:C < 1.0. Relative risk of adverse outcome was approximately 1.5 times higher for every 1-unit increment in UP:C. The decrease in renal function was of greater magnitude in dogs with UP:C > or =1.0, compared with dogs with UP:C < 1.0. CONCLUSIONS AND CLINICAL RELEVANCE: Initial UP:C > or =1.0 in dogs with CRF was associated with greater risk of development of uremic crises and death, compared with dogs with UP:C < 1.0. Initial determinations of UP:C in dogs with naturally occurring CRF may be of value in refining prognoses.

Animals↗

Comparison of losartan and captopril on heart failure-related outcomes and symptoms from the losartan heart failure survival study (ELITE II).

BACKGROUND: Blockade of the renin-angiotensin system with angiotensin-converting enzyme inhibitors improves outcomes and symptoms in patients with heart failure (HF). We compared effects of losartan to captopril on mortality, morbidity, and functional status for patients in the ELITE II study. METHODS AND RESULTS: A total of 3152 patients, aged 60 years or older, with New York Heart Association (NYHA) classes II to IV HF and ejection fraction < or = 40% were assigned to receive losartan 50 mg once daily or captopril 50 mg 3 times daily. Outcome measures included all-cause and HF-related mortality, hospitalizations, and discontinuations; change in NYHA class; and quality of life (QoL). HF-related outcomes were not significantly different between therapies. Similar improvements from baseline (P < .01) in NYHA class were observed within both treatment groups. Among 1856 QoL participants, 1343 patients survived at least 1 year; the QoL for 1-year survivors improved in both treatment groups (P < .001 vs baseline) and did not differ between groups. CONCLUSIONS: In ELITE II, the effects of losartan on HF-related outcomes, NYHA class, and QoL were not superior to those of captopril. Although angiotensin-converting enzyme inhibitors remain the treatment of choice for patients with HF, the similarity of the findings in the present analysis supports a role for angiotensin-receptor antagonists in this patient population.

Aged↗

Clinical and analytical considerations in the study of health status in device trials for heart failure.

BACKGROUND: Measures of health status (including symptoms, functional status, or quality of life) assess patients' experiences of their disease, and may therefore be used to quantify the benefits and risks of treatment. The aim of this article is to provide recommendations to regulatory agencies and research sponsors regarding the use of health status measures in medical device trials. METHODS AND RESULTS: A workshop jointly planned by the Heart Failure Society of America and the US Food and Drug Administration was convened in October 2003 in Washington, DC. A Working Group to address health status measures initiated its collaboration at the workshop and continued its efforts throughout the next year. The Working Group recommended assessment of health status in all studies of heart failure therapy. Standardized instruments known to be valid, reliable, responsive to changes, and available in the languages of target populations should be used. Minimizing bias may be accomplished by using blinded, independent evaluators; collecting multiple health status measures; using valid statistical methods; and creating a health status resource bank. CONCLUSION: Assessment of health status should be part of any device trial and should occur regardless of whether the device is intended as destination or bridging therapy. Health status endpoints should be chosen, collected, and analyzed with the same level of scientific rigor as traditional clinical endpoints. Regulatory agencies should require use of analytic methods that handle the complexity of health status data in addition to usual protocol protections.

Clinical Trials as Topic↗

Key issues in end point selection for heart failure trials: composite end points.

BACKGROUND: Composite outcomes are commonly used in heart failure trials. The aim of this article is to discuss the advantages and disadvantages of composite outcomes and recommend guidelines for reporting them. Examples are used to illustrate key points. METHODS AND RESULTS: A workshop jointly planned by the Heart Failure Society of America and the US Food and Drug Administration was convened in April 2004. One of the panel discussions concerned the use of composite outcomes in heart failure trials. With use of composite outcomes, event rates are higher and if it is reasonable to assume that the treatment effect is similar for each component of the composite outcome, sample size will be smaller than using one of the components as the primary end point. Composites end points are difficult to interpret if effects are not similar for all components or if the effect of treatment is primarily on a more common, less serious component of the composite. Composite outcomes typically only focus on the first occurring event. This can lead to a substantial loss of information in some trials. When composite end points are used, data collection for all components should continue until the end of the trial so that each component can be separately evaluated. CONCLUSION: Composite end points should be used with caution. Additional research is need on optimally weighting components of composite outcomes and to better using the entire event history of patients in heart failure trials. Further analyses of completed trials could be useful in this respect.

Clinical Trials as Topic↗

Results of the Controlled ONset Verapamil INvestigation of Cardiovascular Endpoints (CONVINCE) trial by geographical region.

OBJECTIVE: To examine regional differences in the Controlled ONset Verapamil INvestigation of Cardiovascular Endpoints (CONVINCE) trial. DESIGN: Double-blind, randomized, international clinical trial. SETTING: Six hundred and sixty-one clinical centers in 15 countries. PATIENTS: Hypertensive volunteers (n = 16,602) with > or =1 additional cardiovascular risk factor, grouped into four regions: USA (n = 8144), Canada (n = 3405), Western Europe (Spain, UK, Italy, Sweden, Germany; n = 2048) or 'other' (Bulgaria, Israel, Mexico, Czech Republic, Hungary, Poland, Slovakia, Brazil; n = 2879); subgroupings included country and state/province within the USA and Canada. INTERVENTIONS: Randomized to COER-verapamil or the investigator's choice of either atenolol or hydrochlorothiazide, titrated and additional drugs added as required. MAIN OUTCOME MEASURES: Baseline characteristics; blood pressure control, medication adherence and lost-to-follow-up at 2 years; and composite primary endpoint (stroke, myocardial infarction, cardiovascular death) by regional groupings. RESULTS: Regional differences were found at baseline for age, gender, blood pressure, percentage receiving antihypertensive drug therapy, initial choice of atenolol or hydrochlorothiazide, and risk factor profile. Blood pressure control rates increased markedly during follow-up in all regions, but varied significantly by region. Blood pressure control, medication adherence and lost-to-follow-up rates were poorest in the USA. After adjustment for baseline differences, the primary-event rate for each region was significantly lower than for the USA. Although baseline factors, blood pressure control and event rates varied by region, treatment differences did not. CONCLUSION: Despite differences in baseline and follow-up measures across geographical regions, the absence of treatment differences by region suggests that the overall findings of CONVINCE are robust.

Aged↗

Impact of diabetes and previous myocardial infarction on long-term survival: 25-year mortality follow-up of primary screenees of the Multiple Risk Factor Intervention Trial.

BACKGROUND: The magnitude of coronary mortality risk associated with diabetes or prior myocardial infarction (MI) is debatable. Modulating effects of age, risk factors, and duration of follow-up may explain discrepancies in previous research. Associations with noncardiovascular mortality are little explored. OBJECTIVES: To compare mortality patterns in men with a history of diabetes or MI and to assess modulating effects on mortality of age, cardiovascular risk factors, and follow-up duration. METHODS: We compared the 25-year mortality of 4809 men with diabetes only and 4625 men with MI only (all men aged 35-57 years). RESULTS: The adjusted hazard ratio (HR) for all-cause mortality for those with MI only vs those with diabetes only was 0.97 (95% confidence interval, 0.92-1.03; P =.32). The pattern of deaths was different: higher coronary mortality (HR = 1.37; P<.001) and lower mortality from noncardiovascular causes (HR = 0.66; P<.001) in those with MI only compared with those with diabetes only. This finding prevailed across all ages and levels of cardiovascular risk factors. Hazard ratios for coronary mortality significantly declined over follow-up (2.7, 1.7, 1.2, 1.1, and 1.0 for < or =5, 6-10, 11-15, 16-20, and >20 years of follow-up, respectively), whereas HRs for noncardiovascular mortality remained relatively constant. CONCLUSIONS: Overall, diabetes and MI were similarly strong predictors of total mortality. Higher mortality from noncardiovascular causes was observed in those with diabetes only, whereas prior MI was more strongly predictive of coronary mortality than diabetes at any age and level of cardiovascular risk factors. The difference in coronary mortality between the 2 groups was most evident in the first 10 years of follow-up.

Adult↗