Table 3

Meta-analysis results

	Individual study parameters
	True positive	False positive	False negative	True negative	Sensitivity	Specificity	Sensitivity	Specificity	AUC
Ultrasound: double contour sign
Ottaviani et al15	NR	NR	NR	NR	0.67	0.98	0.83 (0.72–0.91)	0.76 (0.68–0.83)	0.84
Lamers-Karnebeek et al18	20	7	6	21	0.77	0.75
Thiele et al17	34	0	3	26	0.92	1.00
Naredo et al14	68	7	23	35	0.75	0.83
Bergner et al20	36	21	3	53	0.92	0.72
Ultrasound: tophus
Ottaviani et al15	NR	NR	NR	NR	0.74	1.00	0.65 (0.34–0.87)	0.80 (0.38–0.96)	0.75
Lamers-Karnebeek et al18	5	2	21	26	0.19	0.93
Thiele et al17	27	0	10	26	0.73	1.00
Naredo et al14	78	11	13	31	0.86	0.74
Nalbant et al13	15	3	5	17	0.75	0.85
Dual energy computed tomography: MSU crystal deposition
Glazebrook et al12	12	4	0	15	1	0.79	0.87 (0.79–0.93)	0.84 (0.75–0.90)	0.90
Bongartz et al19	36	7	4	34	0.90	0.83
Choi z et al19	34	3	6	37	0.78	0.93