“ Dexmedetomidine …, I 2 = 14%), shorter time to cease shivering (MD = -2.14; 95%CI [− 2.79, − 1.49], P < 0.00001, I 2 = 98%), lower recurrent …, I 2 = 0%) and bradycardia (RR = 4.78; 95%CI [1.76, 13.00], P = 0.002, I 2 = 0%), compared with tramadol.”