Supplementary Table S2. Final statistical analysis
 A. Descriptive statistics by journal-impact group
Measure Higher-impact (n=20) Lower-impact (n=20)
TRUST-PAPER mean±SD 72.15±9.36 56.00±12.08
TRUST-PAPER median 73.5 56.5
TRUST-PAPER range 43-84 34-79
PCC-PAPER mean±SD 3.90±1.25 2.20±1.20
B. Between-group comparisons
Measure TRUST-PAPER PCC-PAPER
Mean difference (95% CI) 16.15 (9.22-23.08) 1.70 (0.92-2.48)
Welch t test t=4.725; df=35.77; p=0.000035 t=4.389; df=37.92; p=0.000088
Mann-Whitney U test U=341.5; p=0.000136 U=332.5; p=0.000273
Hedges’ g 1.465 -
C. Correlations between TRUST-PAPER and PCC-PAPER across all 40 papers
Method Correlation coefficient p
Spearman ρ=0.868 3.89 × 10-13
Pearson r=0.865 6.28 × 10-13

Note: SD, standard deviation; CI, confidence interval; df, degrees of freedom. Mean differences are higher-impact minus lower-impact group means. Between-group comparisons include 20 papers per group; correlations use all 40 papers. PCC-PAPER, Practice Change Confidence scale for individual papers. The dash indicates a value not reported in the source table.