Table 1.

Characteristics of the studies included in the meta-analysis

Author	Published year	Country	Headcount	Grouping (n, patients)	Surgical setting	Jadad core
Patel et al4	2015	India	60	Dexmedetomidine 1 μg/kg (n=30) Normal saline (n=30) Midazolam (n=30) 0.05 mg/kg	Elective surgery	3
Aktolga et al6	2010	India	152	Dexmedetomidine 1 μg/kg (n=50) Normal saline (n=51) Midazolam 0.05 mg/kg (n=51)	Elective surgery	4
Mizrak et al5	2010	Turkey	60	Dexmedetomidine 0.5 μg/kg (n=30) Normal saline (n=30)	Elective surgery	4
Luan et al3	2015	People’s Republic of China	90	Dexmedetomidine 0.5 μg/kg (n=30) Dexmedetomidine 1 μg/kg (n=30) 10 mL isotonic saline (n=30)	Elective surgery	2
Kang et al7	2013	People’s Republic of China	120	Dexmedetomidine 0.5 μg/kg (n=40) Normal saline (n=40) Midazolam 0.03 mg/kg (n=40)	Gynecologic surgery	3
Wu and Jin8	2012	People’s Republic of China	120	Dexmedetomidine 1 μg/kg (n=40) Normal saline Midazolam (n=40) 0.05 mg/kg	Elective surgery	2
Zhao et al9	2011	People’s Republic of China	100	Dexmedetomidine 0.5 μg/kg (n=50) Normal saline (n=50)	Elective surgery	2