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20 protocols using r software

1

Evaluating Synergy of Antibiotic Combinations

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All statistical analyses were conducted using Stata version 11.2 (StataCorp, College Station, TX, USA) and R software (version 4.1.3). A p value less than 0.05 was considered statistically significant. To compare the differences in the antimicrobial resistance rates between VSSA and VISA/hVISA strains, we used both the Chi-square test and Fisher’s exact test, with Fisher’s exact test being utilized for any cell counts less than 5. To compare the proportion of bacterial strains showing synergy and antagonism between two antibiotic combinations, we used McNemar’s test, which is a statistical test used to compare paired proportions. The viable bacterial counts did not follow a normal distribution, as assessed by Shapiro–Wilk test. Therefore, non-parametric statistical tests were used to compare the medians of viable bacterial count between groups. We performed the Friedman test, followed by the Wilcoxon signed-rank test with Bonferroni adjustment for multiple groups. Multiple logistic regression analysis was performed to identify predictors for synergistic actions of ciprofloxacin– and levofloxacin–rifampin combinations. This analysis included variables such as year of isolation, vancomycin susceptibility, sequence type, SCCmec type, spa type, and levels of resistance to rifampin, ciprofloxacin, and levofloxacin.
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2

Meta-analysis of BMP4 rs17563 and NSCL/P

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Heterogeneity was assessed using Cochran's Q statistic and I2 method. The strength of the association between the NSCL/P and BMP4 rs17563 polymorphism risk was assessed by crude ORs with 95% confidence intervals (CIs), which comprised the following models: allele contrast (C versus T); codominant (TC versus TT and CC versus TT); dominant (TC + CC versus TT); and recessive (CC versus TT + TC). If the P value < 0.10 or I2 was greater than 40%, the summary OR estimation was calculated with a random-effect model (DerSimonian and Laird method). Otherwise, the fixed-effect model (Mantel-Haenszel method) was adopted. Cumulative meta-analyses and sensitivity analysis were conducted to evaluate the stability of the results for each model. Potential publication bias was evaluated by Egger's linear regression and Begg's funnel plots. To adjust for multiple comparisons, we applied Bonferroni method with R software. Statistical analysis was performed using STATA version 11.0 (Stata Corporation, College Station, TX, USA) and R software (version 3.1.1). All P values were two-sided. P < 0.05 was considered significant.
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3

Network Meta-Analysis of Chinese Fitness Exercises

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This study used STATA/SE 15.1 (StataCorp, 2017) and R software (version 4.0.1) to conduct data analysis and figures generation. We used WMD and their associated 95% CIs to summarize results. We took into account the existence of heterogeneity among different RCTs; thus, the random-effects model was selected to combine effect sizes in this network meta-analysis. We used the node-splitting model to assess inconsistency between direct and indirect comparisons. The bias in publication and small-scale study effects were evaluated with comparison-adjusted funnel plots, which were generated using “netfunnel” command. The network geometry of three different traditional Chinese fitness exercises was shown and described with network evidence plots, which were generated using “networkplot” command. We calculated the SUCRA and likelihood of being the best and the worst for each intervention to predict the curative effect ranking of each traditional Chinese fitness exercise. The significance level for all data analyses of this network meta-analysis was predetermined at 0.05.
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4

Evaluating Prognostic Biomarkers in Tumor Thrombi

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Logistic regressions including age and gender as covariates, and 2 × 2 contingency Fisher’s exact test were used to evaluate immunohistochemical results from tumor and thrombi. The association with survival was assessed by univariate and multivariate (including age, gender, and tumor stage) Cox regression analyses using the survival package in R software. For the genetic studies, the primary end point was PFS, defined as the time elapsed between the date of entry into the study and the date of disease progression or of the most recent follow-up. Secondary end points were OS, the probability of PFS for at least six months, objective response rate, and toxicity, determined by adverse events and laboratory measures. Statistical analyses were performed using STATA (10.0 STATA Corp.) and R software.
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5

Core Body Temperature Monitoring Protocol

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Core body temperature data was downloaded using HQ Inc. CorTrak Software and trimmed to exclude biologically implausible numbers that would indicate a body temperature lower than extreme hypothermia or higher than hyperthermia (below 32 °C and above 41 °C, respectively). The percentage of time during the workday that the core body temperature was between 37 to 38 °C and over 38 °C was calculated [41 (link),42 (link)]. Descriptive statistics were calculated for the questionnaire responses, WBGT measurements, urine specific gravity, and core body temperatures. Proportions of individuals with specific gravity between 1.020 and 1.030, and above 1.030 were compared using Fisher’s exact test. A Kruskal–Wallis test was used to assess differences in WBGT, specific gravity, and core body temperature by season. Wilcoxon signed rank analysis was performed to compare each season’s post-shift specific gravity to the corresponding morning void. All statistical analyses were completed using STATA 12 (Stata Statistical Software: Release 12, College Station, TX, USA) and R Software (version 3.5.1, Vienna, Austria). An alpha level of 0.05 was considered significant for all statistical tests.
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6

Prostate Cancer Biomarker Evaluation

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Levels of serum proteins and gene expressions were dichotomized using a logistic regression spline model [17 (link)]. All potential biomarkers including SNPs were separately evaluated for individual association with aggressive disease (D’Amico high-risk vs. low-risk) using unconditional multivariable logistic regression adjusted by age at diagnosis (continuous) and PSA levels at diagnosis (categorical). All biomarkers and SNPs of interest were examined for association with time to BCR or progression using multivariate Cox proportional hazard models adjusted for age, GS, T stage and baseline PSA level. Kaplan–Meier analyses and log-rank tests were used to calculate survival differences. To reduce the likelihood of false discovery, q-value for multiple testing was applied in both soluble ICK-related protein and ICK-related genetic variation analysis [18 (link)]. The association between genotypes and soluble ICK-related protein levels was analyzed with Spearman correlation. Meta-analysis was performed with the ‘meta’ package in R.
All data were analyzed and visualized with Excel (Microsoft office 365), R software (v3.4.1), PLINK (v1.07), and STATA 14.2 (STATA Corp). All P values were two-sided, with values less than 0.05 considered statistically significant.
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7

Lameness Induction Evaluation Protocol

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Analyses were conducted with Stata 14.1MP (StataCorp, College Station TX) and R software (version 4.2.2) in RStudio (version 2023.06.0 + 421), with two-sided tests of hypotheses and a p-value < 0.05 as the criterion for statistical significance. All data was evaluated for normality when appropriate using the Shapiro-Wilk test. Multivariable mixed effects logistic regression was used to examine the success of lameness induction with all “sound” and “lame” trials at all video angles considered together. Post-hoc estimation, the area under the curve (AUC) of the receiver operating characteristics (ROC) was calculated. The OR were reported with their respective 95% confidence intervals (95% CI). Descriptive statistics (median and interquartile range (IQR) for ease of grading by video angle were calculated, while Fleiss kappa was to evaluate interobserver agreement between the 3 observers using the irr package. For Fleiss’s kappa statistic, values < 0.00 were considered to be poor agreement, values 0.00–0.20 indicated slight agreement, values 0.21–0.40 indicated fair agreement, values 0.41– 0.60 indicated moderate agreement, values 0.61–0.80 indicated substantial agreement, and values 0.81–1.00 indicated almost perfect agreement [21 (link)].
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8

Meta-Analysis of COVID-19 Mental Health

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Results were analyzed separately according to different outcome variables. For continuous outcome, measured by means and standard deviations of depression or anxiety scores, standardized mean difference (SMD) together with its 95% confidence interval (CI) was used; whereas for categorical outcome, measured by prevalence of depression or anxiety before and after COVID-19, relative risk (RR) with its 95% CI was used. Considering the included studies may use different depression or anxiety instruments, only studies used the same scale and reported the same outcome variable were combined. Therefore, the results were organized in subgroups.
Heterogeneity was tested by using the I2 statistic, with a I2> 50% considered substantial heterogeneity (24 (link)). If significant heterogeneity emerged, random-effects model will be used as recommended (25 (link)). A sensitivity analysis was further performed to evaluate the influence of each included individual study. All analyses were performed in STATA statistical software (Version 14, Stata Corp., College Station, Texas, U.S.) and R software (Version 4.2.0). Two-sided statistical tests were used consistently, with a p < 0.05 considered statistically significant.
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9

Differential Expression and Methylation in Thymoma Patients with and without Myasthenia Gravis

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Chi-square test was used to analyze the differences in clinical information between thymoma patients with MG and those without MG. R packages (limma and edgeR) were used to identify differential expression and differential methylation. Bioconductor analyses (“org.Hs.eg.db,” “DOSE,” “pathview” and “clusterProfiler”) were performed to predict the function of immune-related lncRNAs. Data were analyzed using STATA/MP version 15.0 (StataCorp, College Station, TX, United States) and R software version 4.0.4 for Windows 10.
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10

Socio-demographic Factors and Mental Health

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The sample characteristics were presented using mean and standardized deviation (SD) for continuous variables and using percentage for categorical variables. Hierarchical liner regression models were applied to explore the contribution of socio-demographic characteristics, factors related to COVID-19, somatic characteristics, and support on mental health outcomes, and the increasing of R2 indicted the explanation of the independent variables on the dependent variables, which further verified the importance of the independent variables on dependent variables. In addition, using robust test to confirm the hierarchical liner regression models. All analyses were conducted using SPSS package, Version 20.0, and R software, version 3.6.1, Stata software, version 12.0 and p < 0.05 (two-tails) were considered to have statistical significance.
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