Table 1 Visual analysis and statistics to assess group matching

Visual analysis

• Boxplots

• Histograms

• Density plots

• Dot plots

Descriptive statistics

• Means

• Standard deviation

• Range

• Cohen’s d (includes both groups) [4, 16, 17]

• Variance ratio (includes both groups) [4]

Inferential statistics

• t tests or Kolmogorov-Smirnov test [18] (continuous variables)

• Chi-square test [19], Fisher’s exact test [20], or Wilcoxon test [21] (categorical variables)