Table 9: Level 2 to 4 Evidence: Findings Awareness Across Studies on the Incidence of Intraoperative.

Type of Study (Level of Evidence)	Study (Year)	Incidence of Intraoperative Awareness/Recall %(n)
RCT (2)	Kruerer et al. (2003) (25)	0
	Recart et al. (2003) (27)	0
	Wong et al. (2002) (31)	0
	Puri and Murphy (2003) (28)	SP only: 0.06 (1)
Prospective cohort with historical control (3-b)	Ekman et al. (2004) (24)	BIS, 0.04; SP, 0.18 (P<.038)
Prospective cohort (4-c)	Kerssens et al. (2003) (26)	0
	Schneider et al. (2003) (29)	0
	Lehmann et al. (2003) (30)	0
	Chen et al. (2002) (32)	0
	Schneider et al. (2002) (33)	0
	McCann et al. (2002) (34)	0
	Yeo and Lo (2002) (35)	0
	Tsai et al. (2001) (36)	0
	Sleigh et al. (2001) (37)	0

^*RCT indicates randomized controlled trial.