Table 1.

Characteristics of studies included in this meta-analysis (continued)

Study/year	No. of subjects (n)	TP	FP	FN	TN
Gao et al./2014 12	44	29	4	2	9
Li et al./2014 9	196	157	3	21	15
Chen et al./2014 11	153	87	4	50	12
Herth et al./2009 7	57	9	4	8	36
Bojan et al./2009 10	106	267	51	14	304
Vincent et al./2007 8	22	13	29	0	22