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Table 5 Allium sativum triglyceride (TG) stepwise elimination: comparison of final P values for final models using both large sample and permutation techniques

From: An empirical study using permutation-based resampling in meta-regression

Model Meta-regression (t-distribution), P value Permutation test, P value
1. Methodological covariates (N = 22):   
Appropriate blinding 0.033 0.047
Heterogeneity (I2) 98.1%  
2. Participant level and intervention level covariates (N = 17):   
Length of trial 0.001 0.003
Control group TG baseline 0.008 0.016
Dose of garlic 0.031 0.036
Heterogeneity (I2) 87.0%