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428 protocols using statistical analysis system

1

Dietary Tryptophan and Diquat Oxidative Stress

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All data, expressed as means with their pooled standard errors, were analysed as a 3 × 2 factorial using the general linear model procedures of the Statistical Analysis System (Version 8.1; SAS Institute, Gary, NC). The factors in the models included the main effects of dietary tryptophan levels (0.18, 0.30 or 0.45%) and diquat injection (diquat or sterile 0.9% NaCl solution) as well as their interaction. Furthermore, all data were also analyzed using one-way ANOVA, followed by Ducan’s Multiple Range test of the Statistical Analysis System (Version 8.1; SAS Institute, Gary, NC). Statistical significance was considered at P < 0.05, tendency at P < 0.10.
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2

Fetal Gene Expression in IUGR Placentomes

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Data were subjected to least-squares analysis of variance using the General Linear Models procedures of the Statistical Analysis System (SAS Institute, Cary, NC, USA) and are presented as least-squares means with overall standard error of the mean (SE). There was no effect of fetal sex in the statistical model; therefore, it was removed from the statistical model. Differences in means were considered to be statistically significant when p ≤ 0.05, while p ≤ 0.10 was considered a tendency toward significance. Data from qPCR analyses for placentomes from NR non-IUGR and NR IUGR pregnancies were subjected to least-squares analysis of variance using the General Linear Model procedures of the Statistical Analysis System (SAS Institute, Cary, NC, USA).
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3

Pork Quality Traits and Metabolites

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All statistical analysis was performed using the Statistical Analysis System (2009) . Pearson correlation coefficients between blood and muscle metabolites or between blood and muscle metabolites and pork quality traits were determined using the CORR procedure. To establish multiple regression models for pork quality traits, blood or muscle metabolites were used as independent variables in the REG procedure. Furthermore, the stepwise procedure was used to examine the percentage of variation in certain pork quality traits explained by blood and muscle metabolites. The qualitative variable (batch) was coded as dummy variables to eliminate their effect on the regression model.
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4

Adolescent Smoking Prevalence and Risk Factors

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All data analyses were performed using the Statistical Analysis System software package [22 ]. Descriptive statistics were used to estimate smoking prevalence. The chi square test was used to compare the smoking status of the studied adolescents by their sociodemographic characteristics. The level of statistical significance was defined as P ≤ 0.05. The regression analyses were first performed, variable-by-variable (univariate analyses) to estimate odds ratios (OR) and their 95% confidence intervals (95% CI) for the association of adolescents smoking with the studied risk factors. Then, all variables with a statistically significant association with the dependent variable (smoking) were included in the final predictive model based on the stepwise regression with a p value of 0.01 as entry criterion and a p value of 0.05 as exclusion criterion. Finally, the obtained predictors from stepwise model were entered into multivariate logistic regression model while controlling for age, sex, school level and parents' education as possible known confounders.
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5

Analyzing Experimental Data with GLM

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The general linear models (GLM) procedure in the Statistical Analysis System (SAS User’s Guide, 1985, Statistical Analysis System Inc., Cary, NC) was used to analyze the data from all the experiments. Significant differences were determined using Tukey’s multiple range test and P < 0.05 was considered significant.
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6

Assessing Food Insecurity Prevalence in Emerging Adults

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Frequencies, percentages, and χ2 tests were examined to assess the prevalences of food insecurity in the past year and food insufficiency in the past month across sociodemographic characteristics of emerging adults. Sociodemographic characteristics of interest were assessed as part of the C-EAT survey (ie, sex, parental status, employment status, household receipt of food assistance benefits, living situation, vehicle ownership) or baseline EAT 2010 survey (ie, ethnicity/race, parental SES) and examined within the full sample of 720 survey respondents.12 (link)
,18 (link) The statistical significance of probability tests was determined based on the criteria P < 0.05. Analyses were conducted using the Statistical Analysis System.20
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7

Gene Expression Data Analysis

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The general linear model (GLM) procedure within the Statistical Analysis System (SAS User’s Guide, 1985, Statistical Analysis System Inc., Cary, NC. USA) was used to analyze data from all experiments. A paired Student’s t-test was used to compare relative gene expression. P values of <0.05 were considered significant.
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8

Analyzing Experimental Data with GLM

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The general linear models (GLM) procedure in the Statistical Analysis System (SAS User’s Guide, 1985, Statistical Analysis System Inc., Cary, NC) was used to analyze the data from all the experiments. Significant differences were determined using Tukey’s multiple range test and P < 0.05 was considered significant.
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9

Comparative Analysis of Phenotypic Traits

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All data were shown as mean ± standard error (SE) and all analyses were conducted with using the Statistical Analysis System (Cary, NC, USA, version 9.2). The differences between two groups were subjected to the independent sample t-test (P < 0.05). The differences among different groups were subjected to a least significant difference (LSD) test at the P < 0.05. * and ** indicate significant differences at P < 0.05 and P < 0.01, respectively, compared with PH-1.
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10

Analysis of Participant Characteristics and Satisfaction in Arthritis Program

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We computed descriptive statistics (n and % or mean, SD, minimum, and maximum) for participant characteristics, self-reported behaviors and program satisfaction questions, using the Statistical Analysis System (Cary, NC), version 9.3. To compare the participant characteristics to the BRFSS sample of persons with arthritis, we conducted Chi-squared analyses of categorical data.
For the open-ended questions in the participants’ self-administered questionnaires, two research team members independently coded verbatim responses and organized them into thematic categories. They compared their independent coding results and reached consensus for any areas of disagreement in their initial coding. The categorization of responses under meaningful themes was not mutually exclusive. Rather, the coders assigned all conceptual codes that were applicable to the written responses for each open-ended question; therefore, percentages may not add to 100% and are reported below provide an indication of the relative rank of the themes identified in responses to each question.
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