Table 1

Ultrasonography and pathology data from the 14 primary articles reviewed

Study	No. of patients	Negative ultrasonography report				Positive ultrasonography report

		No. of patients	No polyp	True polyp	True polyp, malignant	No. of patients	No polyp	No polyp, pseudopolyp	No polyp, gallstones	True polyp	True polyp, malignant
Akyurek et al. (11)	853	797	787	10	0	56	46	17	12	10	0

Ali Channa et al. (12)	28	0	—	—	—	28	23	15	8	5	1

Chattopadhyay et al. (13)	23	0	—	—	—	23	20	8	12	3	2

Choi et al. (5)	59	0	—	—	—	59	46	46	5	13	3

Damore et al. (4)	41	0	—	—	—	41	40	27	15	1	0

French et al. (3)	13 703	13 441	13 413	28	0	262	256	139	129	6	3

Huang et al. (14)	143	0	—	—	—	143	121	121	23	22	6

Ito et al. (8)	80	0	—	—	—	80	72	54	9	8	1

Khan et al. (15)	26	0	—	—	—	26	22	21	12	4	1

Mainprize et al. (16)	34	0	—	—	—	34	30	29	22	4	2

Park et al. (17)	180	0	—	—	—	180	114	82	57	66	25

Sarkut et al. (18)	138	0	—	—	—	138	116	77	39	22	21

Xu et al. (19)	59	0	—	—	—	59	50	20	30	9	7

Zielinski et al. (20)	130	0	—	—	—	130	115	79	28	15	9

All	15 497	14 238	14 200	38	0	1259	1071	735	401	188	81

All excluding French et al. (3)	1794	797	787	10	0	997	815	596	272	182	78