作业帮英语翻译StatisticalanalysisTo corroborate the fruit and vegetabl
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英语翻译
Statisticalanalysis
To corroborate the fruit and vegetable intake data from the 3-mo food-frequency questionnaire,we used Spearman rank-order correlation analysis to compare the data with data from the 24-h dietary recall.
Fruit and vegetable intake was grouped into 4 categories by intake (< 1 time/d,1 time/d,2 times/d,and ≥3 times/d) to identify discrete levels of consumption and to provide a sufficient number of participants at risk in each category.
For each baseline characteristic,the mean or percentage of study participants was calculated by category of fruit and vegetable intake.
The statistical significance of differences was examined by using analysis of variance (continuous variables) and the chi-square test (categorical variables).
The cumulative incidence of and mortality from cardiovascular disease by category of fruit and vegetable intake were calculated by using the Kaplan-Meier method,and differences in cumulative rates were examined by the log-rank test for trend.
Cox proportional hazards regression models were used to explore the relation between categories of fruit and vegetable intake and the risk of cardiovascular disease.
The multivariate models were adjusted for physical activity (3 categories),education level (completed or did not complete high school),regular alcohol consumption (4 categories),current cigarette smoking at baseline (yes or no),vitamin supplement use (yes or no),total energy intake (continuously),sex,race,and diabetic status (yes or no).
Age was used as the time scale in all time-to-event analyses,and all analyses were stratified by birth cohort to control for calendar period and cohort effects.
Estimation methods taking into accountsample clustering and stratification of the NHANES I were used.
Data from the small number of participantswho had reached 85 y of age were censored.
不要网上翻译
Statisticalanalysis
To corroborate the fruit and vegetable intake data from the 3-mo food-frequency questionnaire,we used Spearman rank-order correlation analysis to compare the data with data from the 24-h dietary recall.
Fruit and vegetable intake was grouped into 4 categories by intake (< 1 time/d,1 time/d,2 times/d,and ≥3 times/d) to identify discrete levels of consumption and to provide a sufficient number of participants at risk in each category.
For each baseline characteristic,the mean or percentage of study participants was calculated by category of fruit and vegetable intake.
The statistical significance of differences was examined by using analysis of variance (continuous variables) and the chi-square test (categorical variables).
The cumulative incidence of and mortality from cardiovascular disease by category of fruit and vegetable intake were calculated by using the Kaplan-Meier method,and differences in cumulative rates were examined by the log-rank test for trend.
Cox proportional hazards regression models were used to explore the relation between categories of fruit and vegetable intake and the risk of cardiovascular disease.
The multivariate models were adjusted for physical activity (3 categories),education level (completed or did not complete high school),regular alcohol consumption (4 categories),current cigarette smoking at baseline (yes or no),vitamin supplement use (yes or no),total energy intake (continuously),sex,race,and diabetic status (yes or no).
Age was used as the time scale in all time-to-event analyses,and all analyses were stratified by birth cohort to control for calendar period and cohort effects.
Estimation methods taking into accountsample clustering and stratification of the NHANES I were used.
Data from the small number of participantswho had reached 85 y of age were censored.
不要网上翻译
Statisticalanalysis 统计学 To corroborate the fruit and vegetable intake data from the 3-mo food-frequency questionnaire,we used Spearman rank-order correlation analysis to compare the data wit...
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