Table 2 Parameter estimates from regression analysis (all 55 studies). The parameters originally refer to the rate on the logarithmic scale; the effects may also be expressed in terms of a corresponding percentage change (last column). Bayesian posterior tail probabilities (p_B) are also provided for the regression coefficients instead of frequentist two-sided p-values

From: Decline of COPD exacerbations in clinical trials over two decades – a systematic review and meta-regression