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Table 5 Meta-regression analysis for the association between moderators and tooth loss

From: Effect of smoking cessation on tooth loss: a systematic review with meta-analysis

 Former SmokersCurrent smokers
ModeratorEstimate* (95%CI)p-valueResidual I2R2Estimate* (95%CI)p-valueResidual I2R2
Age0.01 (−0.87 to 0.38)0.300%0%−0.01 (−0.03 to 0.005)0.1577.6%0%
Cigarretes−0.01 (− 0.10 to 0.07)0.760%0%− 0.04 (− 0.14 to 0.06)0.4364.7%0%
Dropout rateƗ0.01 (−0.01 to 0.02)0.5074.1%0%0.004 (−0.01 to 0.02)0.5870.2%43.7%
Time since cessation0.09 (−0.01 to 0.18)0.0622.0%57.8%
  1. CI: Confidence Interval, I2: residual heterogeneity / unaccounted variability, R2: amount of heterogeneity accounted for each variable, * Coefficient of Linear Regression (meta-regression), Ɨ dropout rates considering the entire sample included in the study (or the any subgroup, when available)