Table 6.

Per-operative diagnosis

CT-scan versus per-operative diagnosis
Gutiérrez de la Peña et al. [6]	Risk of bias	++++	4 × 4 Table
	Level of evidence	2B		Surgery +	Surgery −	Total
			CT +	8	1	9
			CT −	0	41	41
			Total	8	42	50
Højer et al. [22]	Risk of bias	+++	4 × 4 Table
	Level of evidence	3B		Surgery +	Surgery −	Total
			CT +	6	1	7
			CT −	2	3	5
			Total	8	4	12
Holihan et al. [23]	Risk of bias	+	4 × 4 Table
	Level of evidence	3B		Surgery +	Surgery −	Total
			CT +	14	1	15
			CT −	0	3	3
			Total	14	4	18
Physical examination versus per-operative diagnosis
Gutiérrez de la Peña et al. [6]	Risk of bias	++++	4 × 4 Table
	Level of evidence	2B		Surgery +	Surgery −	Total
			PE +	6	4	10
			PE −	2	38	40
			Total	8	42	50
Holihan et al. [23]	Risk of bias	+	4 × 4 Table
	Level of evidence	3B		Surgery +	Surgery −	Total
			PE +	11	1	12
			PE −	3	3	6
			Total	14	4	18

PE physical examination