did not reach statistical significancep < 0.0001
Meta‐Analysis of Butyric Acid Concentration in Patients With Periodontitis Meta‐analysis indicated an overall decreasing trend in butyrate levels in GCF or saliva from patients with periodontitis; however, the difference did not reach statistical significance (SMD = −1.58, 95% CI: −6.53 to 3.36) and heterogeneity was substantial ( I 2 = 90.9%, p < 0.0001; Figure 3 A).