human
***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: Of 22 r and omized trials of rehabilitation with exercise  after myocardial infa rct ion ( MI ) , one trial had results that achieved conventional statistical significance . To determine whether or not these studies , in the aggregate , show a significant benefit of rehabilitation after myocardial infa rct ion , we performed an overview of all r and omized trials , involving 4,554 patients ; we evaluated total and cardiovascular mortality , sudden death , and fatal and nonfatal reinfa rct ion . For each endpoint , we calculated an odds ratio ( OR ) and 95 % confidence interval ( 95 % CI ) for the trials combined . After an average of 3 years of follow-up , the ORs were significantly lower in the rehabilitation than in the comparison group : specifically , total mortality ( OR = 0.80 [ 0.66 , 0.96 ] ) , cardiovascular mortality ( OR = 0.78 [ 0.63 , 0.96 ] ) , and fatal reinfa rct ion ( OR = 0.75 [ 0.59 , 0.95 ] ) . The OR for sudden death was significantly lower in the rehabilitation than in the comparison group at 1 year ( OR = 0.63 [ 0.41 , 0.97 ] ) . The data were compatible with a benefit at 2 ( OR = 0.76 [ 0.54 , 1.06 ] ) and 3 years ( OR = 0.92 [ 0.69 , 1.23 ] ) , but these findings were not statistically significant . For nonfatal reinfa rct ion , there were no significant differences between the two groups after 1 ( OR = 1.09 [ 0.76 , 1.57 ] ) , 2 ( OR = 1.10 [ 0.82 , 1.47 ] ) , or 3 years ( OR = 1.09 [ 0.88 , 1.34 ] ) of follow-up . The observed 20 % reduction in overall mortality reflects a decreased risk of cardiovascular mortality and fatal reinfa rct ion throughout at least 3 years and a reduction in sudden death during the 1st year after infa rct ion and possibly for 2 - 3 years . With respect to the independent effects of the physical exercise component of cardiac rehabilitation , the relatively small number of " exercise only " trials , combined with the possibility that they may have had a formal or informal nonexercise component precludes the possibility of reaching any definitive conclusion . To do so would require a r and omized trial of sufficient size to distinguish between no effect and the most plausible effect based on the results of this overview Background —Our purpose was to assess the time course of the benefit of n-3 polyunsaturated fatty acids ( PUFAs ) on mortality documented by the GISSI-Prevenzione trial in patients surviving a recent ( <3 months ) myocardial infa rct ion . Methods and Results —In this study , 11 323 patients were r and omly assigned to supplements of n-3 PUFAs , vitamin E ( 300 mg/d ) , both , or no treatment ( control ) on top of optimal pharmacological treatment and lifestyle advice . Intention-to-treat analysis adjusted for interaction between treatments was carried out . Early efficacy of n-3 PUFA treatment for total , cardiovascular , cardiac , coronary , and sudden death ; nonfatal myocardial infa rct ion ; total coronary heart disease ; and cerebrovascular events was assessed by right-censoring follow-up data 12 times from the first month after r and omization up to 12 months . Survival curves for n-3 PUFA treatment diverged early after r and omization , and total mortality was significantly lowered after 3 months of treatment ( relative risk [ RR ] 0.59 ; 95 % CI 0.36 to 0.97;P = 0.037 ) . The reduction in risk of sudden death was specifically relevant and statistically significant already at 4 months ( RR 0.47 ; 95 % CI 0.219 to 0.995;P = 0.048 ) . A similarly significant , although delayed , pattern after 6 to 8 months of treatment was observed for cardiovascular , cardiac , and coronary deaths . Conclusions —The early effect of low-dose ( 1 g/d ) n-3 PUFAs on total mortality and sudden death supports the hypothesis of an antiarrhythmic effect of this drug . Such a result is consistent with the wealth of evidence coming from laboratory experiments on isolated myocytes , animal models , and epidemiological and clinical studies Abstract Objective To compare the hazards of cigarette smoking in men who formed their habits at different periods , and the extent of the reduction in risk when cigarette smoking is stopped at different ages . Design Prospect i ve study that has continued from 1951 to 2001 . Setting United Kingdom . Participants 34 439 male British doctors . Information about their smoking habits was obtained in 1951 , and periodically thereafter ; cause specific mortality was monitored for 50 years . Main outcome measures Overall mortality by smoking habit , considering separately men born in different periods . Results The excess mortality associated with smoking chiefly involved vascular , neoplastic , and respiratory diseases that can be caused by smoking . Men born in 1900 - 1930 who smoked only cigarettes and continued smoking died on average about 10 years younger than lifelong non-smokers . Cessation at age 60 , 50 , 40 , or 30 years gained , respectively , about 3 , 6 , 9 , or 10 years of life expectancy . The excess mortality associated with cigarette smoking was less for men born in the 19th century and was greatest for men born in the 1920s . The cigarette smoker versus non-smoker probabilities of dying in middle age ( 35 - 69 ) were 42 % ν24 % ( a twofold death rate ratio ) for those born in 1900 - 1909 , but were 43 % ν 15 % ( a threefold death rate ratio ) for those born in the 1920s . At older ages , the cigarette smoker versus non-smoker probabilities of surviving from age 70 to 90 were 10 % ν 12 % at the death rates of the 1950s ( that is , among men born around the 1870s ) but were 7 % ν 33 % ( again a threefold death rate ratio ) at the death rates of the 1990s ( that is , among men born around the 1910s ) . Conclusion A substantial progressive decrease in the mortality rates among non-smokers over the past half century ( due to prevention and improved treatment of disease ) has been wholly outweighed , among cigarette smokers , by a progressive increase in the smoker ν non-smoker death rate ratio due to earlier and more intensive use of cigarettes . Among the men born around 1920 , prolonged cigarette smoking from early adult life tripled age specific mortality rates , but cessation at age 50 halved the hazard , and cessation at age 30 avoided almost all of it OBJECTIVES We sought to investigate the impact of body mass index ( BMI ) on short- and long-term outcomes after initial revascularization with percutaneous transluminal coronary angioplasty ( PTCA ) or coronary artery bypass graft surgery ( CABG ) .  BACKGROUND Equivocal results exist on the impact of BMI on the risk of in-hospital complications after PTCA or CABG , and no long-term mortality data exist from a large series of revascularized patients . METHODS From the r and omized series and observational registry of the Bypass Angioplasty Revascularization Investigation ( BARI ) , 2,108 patients who had PTCA and 1,526 patients who had CABG were evaluated by taking their BMI at study entry . They were classified as follows : low ( < 20 kg/m(2 ) ) , normal ( 20 to 24.9 kg/m(2 ) ) , overweight ( 25 to 29.9 kg/m(2 ) ) , class I obese ( 30 to 34.9 kg/m(2 ) ) and class II/III obese ( greater-than-or-equal 35 kg/m(2 ) ) . In-hospital complications and short- and long-term mortalities were compared between levels of BMI within each mode of initial revascularization . RESULTS Among patients who had PTCA , each unit increase in BMI was associated with a 5.5 % lower adjusted risk of a major in-hospital event ( death , myocardial infa rct ion , stroke , coma ) ; among patients who had CABG , no difference in the in-hospital outcome was observed according to BMI . In contrast , BMI was not associated with five-year mortality in the PTCA group ; among the CABG group , adjusted relative risks of five-year cardiac mortality according to levels of BMI were 0.0 ( low ) , 1.0 ( normal ) , 2.02 ( overweight ) , 3.16 ( class I obese ) and 4.85 ( class II/III obese ) ( linear p < 0.001 ) . CONCLUSIONS Body mass index appears to have a differential impact on short- and long-term outcomes after coronary revascularization . These results underscore the need for further research to identify factors responsible for the apparent short-term protective effect of a higher BMI in patients undergoing PTCA and to study the impact of weight reduction on the long-term survival of obese patients undergoing CABG BACKGROUND Adherence to a Mediterranean diet may improve longevity , but relevant data are limited . METHODS We conducted a population -based , prospect i ve investigation involving 22,043 adults in Greece who completed an extensive , vali date d , food-frequency question naire at base line .  Adherence to the traditional Mediterranean diet was assessed by a 10-point Mediterranean-diet scale that incorporated the salient characteristics of this diet ( range of scores , 0 to 9 , with higher scores indicating greater adherence ) . We used proportional-hazards regression to assess the relation between adherence to the Mediterranean diet and total mortality , as well as mortality due to coronary heart disease and mortality due to cancer , with adjustment for age , sex , body-mass index , physical-activity level , and other potential confounders . RESULTS During a median of 44 months of follow-up , there were 275 deaths . A higher degree of adherence to the Mediterranean diet was associated with a reduction in total mortality ( adjusted hazard ratio for death associated with a two-point increment in the Mediterranean-diet score , 0.75 [ 95 percent confidence interval , 0.64 to 0.87 ] ) . An inverse association with greater adherence to this diet was evident for both death due to coronary heart disease ( adjusted hazard ratio , 0.67 [ 95 percent confidence interval , 0.47 to 0.94 ] ) and death due to cancer ( adjusted hazard ratio , 0.76 [ 95 percent confidence interval , 0.59 to 0.98 ] ) . Associations between individual food groups contributing to the Mediterranean-diet score and total mortality were generally not significant . CONCLUSIONS Greater adherence to the traditional Mediterranean diet is associated with a significant reduction in total mortality BACKGROUND The Lyon Diet Heart Study is a r and omized secondary prevention trial aim ed at testing whether a Mediterranean-type diet may reduce the rate of recurrence  after a first myocardial infa rct ion . An intermediate analysis showed a striking protective effect after 27 months of follow-up . This report presents results of an extended follow-up ( with a mean of 46 months per patient ) and deals with the relationships of dietary patterns and traditional risk factors with recurrence . METHODS AND RESULTS Three composite outcomes ( COs ) combining either cardiac death and nonfatal myocardial infa rct ion ( CO 1 ) , or the preceding plus major secondary end points ( unstable angina , stroke , heart failure , pulmonary or peripheral embolism ) ( CO 2 ) , or the preceding plus minor events requiring hospital admission ( CO 3 ) were studied . In the  Mediterranean diet group , CO 1 was reduced ( 14 events versus 44 in the prudent Western-type diet group , P=0.0001 ) , as were CO 2 ( 27 events versus 90 , P=0.0001 ) and CO 3 ( 95 events versus 180 , P=0 . 0002 ) . Adjusted risk ratios ranged from 0.28 to 0.53 . Among the traditional risk factors , total cholesterol ( 1 mmol/L being associated with an increased risk of 18 % to 28 % ) , systolic blood pressure ( 1 mm Hg being associated with an increased risk of 1 % to 2 % ) , leukocyte count ( adjusted risk ratios ranging from 1.64 to 2.86 with count > 9x10(9)/L ) , female sex ( adjusted risk ratios , 0.27 to 0 . 46 ) , and aspirin use ( adjusted risk ratios , 0.59 to 0.82 ) were each significantly and independently associated with recurrence . CONCLUSIONS The protective effect of the Mediterranean dietary pattern was maintained up to 4 years after the first infa rct ion , confirming previous intermediate analyses . Major traditional risk factors , such as high blood cholesterol and blood pressure , were shown to be independent and joint predictors of recurrence , indicating that the Mediterranean dietary pattern did not alter , at least qualitatively , the usual relationships between major risk factors and recurrence . Thus , a comprehensive strategy to decrease cardiovascular morbidity and mortality should include primarily a 
    Output:
    
agent
Available studies show convincingly the health benefits of lifestyle changes in CAD patients .
Effect estimates of combined dietary changes look promising .
***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: Of 22 r and omized trials of rehabilitation with exercise  after myocardial infa rct ion ( MI ) , one trial had results that achieved conventional statistical significance . To determine whether or not these studies , in the aggregate , show a significant benefit of rehabilitation after myocardial infa rct ion , we performed an overview of all r and omized trials , involving 4,554 patients ; we evaluated total and cardiovascular mortality , sudden death , and fatal and nonfatal reinfa rct ion . For each endpoint , we calculated an odds ratio ( OR ) and 95 % confidence interval ( 95 % CI ) for the trials combined . After an average of 3 years of follow-up , the ORs were significantly lower in the rehabilitation than in the comparison group : specifically , total mortality ( OR = 0.80 [ 0.66 , 0.96 ] ) , cardiovascular mortality ( OR = 0.78 [ 0.63 , 0.96 ] ) , and fatal reinfa rct ion ( OR = 0.75 [ 0.59 , 0.95 ] ) . The OR for sudden death was significantly lower in the rehabilitation than in the comparison group at 1 year ( OR = 0.63 [ 0.41 , 0.97 ] ) . The data were compatible with a benefit at 2 ( OR = 0.76 [ 0.54 , 1.06 ] ) and 3 years ( OR = 0.92 [ 0.69 , 1.23 ] ) , but these findings were not statistically significant . For nonfatal reinfa rct ion , there were no significant differences between the two groups after 1 ( OR = 1.09 [ 0.76 , 1.57 ] ) , 2 ( OR = 1.10 [ 0.82 , 1.47 ] ) , or 3 years ( OR = 1.09 [ 0.88 , 1.34 ] ) of follow-up . The observed 20 % reduction in overall mortality reflects a decreased risk of cardiovascular mortality and fatal reinfa rct ion throughout at least 3 years and a reduction in sudden death during the 1st year after infa rct ion and possibly for 2 - 3 years . With respect to the independent effects of the physical exercise component of cardiac rehabilitation , the relatively small number of " exercise only " trials , combined with the possibility that they may have had a formal or informal nonexercise component precludes the possibility of reaching any definitive conclusion . To do so would require a r and omized trial of sufficient size to distinguish between no effect and the most plausible effect based on the results of this overview Background —Our purpose was to assess the time course of the benefit of n-3 polyunsaturated fatty acids ( PUFAs ) on mortality documented by the GISSI-Prevenzione trial in patients surviving a recent ( <3 months ) myocardial infa rct ion . Methods and Results —In this study , 11 323 patients were r and omly assigned to supplements of n-3 PUFAs , vitamin E ( 300 mg/d ) , both , or no treatment ( control ) on top of optimal pharmacological treatment and lifestyle advice . Intention-to-treat analysis adjusted for interaction between treatments was carried out . Early efficacy of n-3 PUFA treatment for total , cardiovascular , cardiac , coronary , and sudden death ; nonfatal myocardial infa rct ion ; total coronary heart disease ; and cerebrovascular events was assessed by right-censoring follow-up data 12 times from the first month after r and omization up to 12 months . Survival curves for n-3 PUFA treatment diverged early after r and omization , and total mortality was significantly lowered after 3 months of treatment ( relative risk [ RR ] 0.59 ; 95 % CI 0.36 to 0.97;P = 0.037 ) . The reduction in risk of sudden death was specifically relevant and statistically significant already at 4 months ( RR 0.47 ; 95 % CI 0.219 to 0.995;P = 0.048 ) . A similarly significant , although delayed , pattern after 6 to 8 months of treatment was observed for cardiovascular , cardiac , and coronary deaths . Conclusions —The early effect of low-dose ( 1 g/d ) n-3 PUFAs on total mortality and sudden death supports the hypothesis of an antiarrhythmic effect of this drug . Such a result is consistent with the wealth of evidence coming from laboratory experiments on isolated myocytes , animal models , and epidemiological and clinical studies Abstract Objective To compare the hazards of cigarette smoking in men who formed their habits at different periods , and the extent of the reduction in risk when cigarette smoking is stopped at different ages . Design Prospect i ve study that has continued from 1951 to 2001 . Setting United Kingdom . Participants 34 439 male British doctors . Information about their smoking habits was obtained in 1951 , and periodically thereafter ; cause specific mortality was monitored for 50 years . Main outcome measures Overall mortality by smoking habit , considering separately men born in different periods . Results The excess mortality associated with smoking chiefly involved vascular , neoplastic , and respiratory diseases that can be caused by smoking . Men born in 1900 - 1930 who smoked only cigarettes and continued smoking died on average about 10 years younger than lifelong non-smokers . Cessation at age 60 , 50 , 40 , or 30 years gained , respectively , about 3 , 6 , 9 , or 10 years of life expectancy . The excess mortality associated with cigarette smoking was less for men born in the 19th century and was greatest for men born in the 1920s . The cigarette smoker versus non-smoker probabilities of dying in middle age ( 35 - 69 ) were 42 % ν24 % ( a twofold death rate ratio ) for those born in 1900 - 1909 , but were 43 % ν 15 % ( a threefold death rate ratio ) for those born in the 1920s . At older ages , the cigarette smoker versus non-smoker probabilities of surviving from age 70 to 90 were 10 % ν 12 % at the death rates of the 1950s ( that is , among men born around the 1870s ) but were 7 % ν 33 % ( again a threefold death rate ratio ) at the death rates of the 1990s ( that is , among men born around the 1910s ) . Conclusion A substantial progressive decrease in the mortality rates among non-smokers over the past half century ( due to prevention and improved treatment of disease ) has been wholly outweighed , among cigarette smokers , by a progressive increase in the smoker ν non-smoker death rate ratio due to earlier and more intensive use of cigarettes . Among the men born around 1920 , prolonged cigarette smoking from early adult life tripled age specific mortality rates , but cessation at age 50 halved the hazard , and cessation at age 30 avoided almost all of it OBJECTIVES We sought to investigate the impact of body mass index ( BMI ) on short- and long-term outcomes after initial revascularization with percutaneous transluminal coronary angioplasty ( PTCA ) or coronary artery bypass graft surgery ( CABG ) .  BACKGROUND Equivocal results exist on the impact of BMI on the risk of in-hospital complications after PTCA or CABG , and no long-term mortality data exist from a large series of revascularized patients . METHODS From the r and omized series and observational registry of the Bypass Angioplasty Revascularization Investigation ( BARI ) , 2,108 patients who had PTCA and 1,526 patients who had CABG were evaluated by taking their BMI at study entry . They were classified as follows : low ( < 20 kg/m(2 ) ) , normal ( 20 to 24.9 kg/m(2 ) ) , overweight ( 25 to 29.9 kg/m(2 ) ) , class I obese ( 30 to 34.9 kg/m(2 ) ) and class II/III obese ( greater-than-or-equal 35 kg/m(2 ) ) . In-hospital complications and short- and long-term mortalities were compared between levels of BMI within each mode of initial revascularization . RESULTS Among patients who had PTCA , each unit increase in BMI was associated with a 5.5 % lower adjusted risk of a major in-hospital event ( death , myocardial infa rct ion , stroke , coma ) ; among patients who had CABG , no difference in the in-hospital outcome was observed according to BMI . In contrast , BMI was not associated with five-year mortality in the PTCA group ; among the CABG group , adjusted relative risks of five-year cardiac mortality according to levels of BMI were 0.0 ( low ) , 1.0 ( normal ) , 2.02 ( overweight ) , 3.16 ( class I obese ) and 4.85 ( class II/III obese ) ( linear p < 0.001 ) . CONCLUSIONS Body mass index appears to have a differential impact on short- and long-term outcomes after coronary revascularization . These results underscore the need for further research to identify factors responsible for the apparent short-term protective effect of a higher BMI in patients undergoing PTCA and to study the impact of weight reduction on the long-term survival of obese patients undergoing CABG BACKGROUND Adherence to a Mediterranean diet may improve longevity , but relevant data are limited . METHODS We conducted a population -based , prospect i ve investigation involving 22,043 adults in Greece who completed an extensive , vali date d , food-frequency question naire at base line .  Adherence to the traditional Mediterranean diet was assessed by a 10-point Mediterranean-diet scale that incorporated the salient characteristics of this diet ( range of scores , 0 to 9 , with higher scores indicating greater adherence ) . We used proportional-hazards regression to assess the relation between adherence to the Mediterranean diet and total mortality , as well as mortality due to coronary heart disease and mortality due to cancer , with adjustment for age , sex , body-mass index , physical-activity level , and other potential confounders . RESULTS During a median of 44 months of follow-up , there were 275 deaths . A higher degree of adherence to the Mediterranean diet was associated with a reduction in total mortality ( adjusted hazard ratio for death associated with a two-point increment in the Mediterranean-diet score , 0.75 [ 95 percent confidence interval , 0.64 to 0.87 ] ) . An inverse association with greater adherence to this diet was evident for both death due to coronary heart disease ( adjusted hazard ratio , 0.67 [ 95 percent confidence interval , 0.47 to 0.94 ] ) and death due to cancer ( adjusted hazard ratio , 0.76 [ 95 percent confidence interval , 0.59 to 0.98 ] ) . Associations between individual food groups contributing to the Mediterranean-diet score and total mortality were generally not significant . CONCLUSIONS Greater adherence to the traditional Mediterranean diet is associated with a significant reduction in total mortality BACKGROUND The Lyon Diet Heart Study is a r and omized secondary prevention trial aim ed at testing whether a Mediterranean-type diet may reduce the rate of recurrence  after a first myocardial infa rct ion . An intermediate analysis showed a striking protective effect after 27 months of follow-up . This report presents results of an extended follow-up ( with a mean of 46 months per patient ) and deals with the relationships of dietary patterns and traditional risk factors with recurrence . METHODS AND RESULTS Three composite outcomes ( COs ) combining either cardiac death and nonfatal myocardial infa rct ion ( CO 1 ) , or the preceding plus major secondary end points ( unstable angina , stroke , heart failure , pulmonary or peripheral embolism ) ( CO 2 ) , or the preceding plus minor events requiring hospital admission ( CO 3 ) were studied . In the  Mediterranean diet group , CO 1 was reduced ( 14 events versus 44 in the prudent Western-type diet group , P=0.0001 ) , as were CO 2 ( 27 events versus 90 , P=0.0001 ) and CO 3 ( 95 events versus 180 , P=0 . 0002 ) . Adjusted risk ratios ranged from 0.28 to 0.53 . Among the traditional risk factors , total cholesterol ( 1 mmol/L being associated with an increased risk of 18 % to 28 % ) , systolic blood pressure ( 1 mm Hg being associated with an increased risk of 1 % to 2 % ) , leukocyte count ( adjusted risk ratios ranging from 1.64 to 2.86 with count > 9x10(9)/L ) , female sex ( adjusted risk ratios , 0.27 to 0 . 46 ) , and aspirin use ( adjusted risk ratios , 0.59 to 0.82 ) were each significantly and independently associated with recurrence . CONCLUSIONS The protective effect of the Mediterranean dietary pattern was maintained up to 4 years after the first infa rct ion , confirming previous intermediate analyses . Major traditional risk factors , such as high blood cholesterol and blood pressure , were shown to be independent and joint predictors of recurrence , indicating that the Mediterranean dietary pattern did not alter , at least qualitatively , the usual relationships between major risk factors and recurrence . Thus , a comprehensive strategy to decrease cardiovascular morbidity and mortality should include primarily a 
    Output:
    