Fig. 2
From: Mendelian randomization analyses support causal relationships between gut microbiome and longevity
The forest plot depicts the causal associations between Bacteroides massiliensis and traits associated with human longevity. The slope value equals the β-value calculated using the three methods (IVW, weighted median, and MR Egger), and it signifies the magnitude of the causal effect. A positive slope indicates that exposure is a contributory factor in promoting the outcome, whereas a negative slope suggests the opposite effect. Abbreviations: CI, confidence interval; OR, odds ratio; Nsnp, the number of single nucleotide polymorphisms (SNPs)