Table 4. Meta-regression analysis.

	Coefficient	SE	95% CI	P value
One procedure
Sample size (≥100 patients or less)	-0.94	0.31	-1.56 to -0.33	<0.01
Study design (RCT or non-RCT)	-0.65	0.43	-1.49 to 0.18	0.12
Ablation strategy (adjunctive CFAE or GP)	-0.95	0.32	-1.58 to -0.32	<0.01
Duration of follow-up (12 months or longer)	-0.46	0.29	-1.03 to 0.15	0.11
Type of AF (only paroxysmal or not)	-0.39	0.29	-0.98 to 0.19	0.12
Repeat procedure
Sample size (≥100 patients or less)	-1.39	0.41	-2.19 to -0.60	<0.01
Study design (RCT or non-RCT)	0.26	1.17	-2.03 to 2.55	0.82
Ablation strategy (adjunctive CFAE or GP)	0.66	0.81	-0.92 to 2.24	0.41
Duration of follow-up (12 months or longer)	0.41	0.87	-1.29 to 2.11	0.63
Type of AF (only paroxysmal or not)	-0.33	0.56	-1.44 to 0.78	0.56

CI, confidence interval; SE, standard error.