Subgroup factors Numbers of study WMD (95%CI) I2 (%) P value P for interaction
Study design 0.344
Multi-center 4 0.88 (-15.84, 17.61) 96.4 0.918
Single-center 6 -9.94 (-24.90, 5.02) 96.8 0.193
Follow up 0.421
<12 6 -9.32 (-15.35, 6.70) 96.8 0.254
≥12 4 -0.14 (-15.74, 15.46) 96.5 0.913
ICE Sample size 0.588
>100 5 -9.07 (-31,36, 13.22) 97.9 0.425
≤100 5 -2.28 (-12.52, 7.95) 93.5 0.786
Male proportion 0.694
<70 7 -3.21 (-13.70, 7.28) 95.2 0.548
≥70 2 -5.75 (-71.88, 42.19) 99.2 0.610
Age cutoff 0.800
≥75 5 -4.30 (-20.3, 11.43) 97.3 0.592
<75 4 -7.58 (-27.53, 12.38) 96.5 0.457
HT proportion 0.810
<90 4 -14.35 (-42.06, 13.37) 97.8 0.310
≥90 2 -10.30 (-28.04, 7.43) 96.7 0.255
PAF proportion 0.014
>50 1 14.20 (7.60, 20.80) - 0.000
≤50 4 -18.66 (-43.95, 6.63) 98.2 0.148
Devices type 0.024
Dual-seal mechanism 3 -1.35 (-23.92, 21.23) 97.4 0.907
Single-seal mechanism 4 4.02 (-4.61, 12.65) 82.9 0.361
Muti-seal mechanism 2 -31.56 (-55.57, -7.55) 95.8 0.010