Table 3.

Previous studies of the IST distributions in bilateral electroconvulsive therapy

Study	IST (Mean±SD)	Median	Range	Diagnosis	Anesthetics	Ethnicity	Number of participants
Coffey et al. [15]	86.4±34.9			Affective disorder	Methohexital	American	25
Scott et al. [20]		75	50–200	Depressive disorder	Methohexitone	European	100
Chanpattana et al. [28]	91.3±31.2			Schizophrenia	Thiopental	Asian (Thai)	93
Chung and Wong [29]	117.4±65.6		48–403	Mixed	Thiopentone	Asian (Chinese)	54
Chung and Wong [30]	105.5±40.6		48–192	Mixed thiopentone		Asian (Chinese)	22
Chung [56]	115.1		48–403	Mixed	Thiopentone	Asian (Chinese)	105
Petrides et al. [10]	126.0±69.7	100	25–400	Depressive disorder	Methohexital	American	402
van Waarde et al. [43]	111.6			Mixed	Mixed	Meta-analysis	1,116
Bennett et al. [55]		125	50–300	Depressive disorder	(Not informed)	European	62
van Waarde et al. [18]	95.4±59.5			Depressive disorder	Etomidate	European	28
Yashuda et al. [23]	136		50.4–403	Major depressive disorder	Thiamylal	Asian (Japanese)	54
Nitturkar et al. [44]	130.4±52.0			Mixed	Thiopentone	Asian (Indian)	640
Chi et al. [24]	186.7±35.1			Mixed	Propofol	Asian (Korean)	43
Present study	105.9±54.5	96	48–288	Schizophrenia	Thiopental	Asian (Korean)	56

SD: standard deviation, IST: initial seizure threshold