Table 2.

Study characteristics and demographics.

Author	Year	N Nodules	Mean Nodule Size (mm)	N Benign Nodules	N Malignant Nodules	Papillary Ca	Follicular Ca	Medullary Ca	Other Thyroid Ca
Zhou	2020	105	NS	75	30	NS	NS	NS	NS
Nguyen	2019	61	NS	11	50	NS	NS	NS	NS
Wei	2020	2489	NS	1021	1468	1442	11	15	0
Park	2019	286	16.2	130	156	149	6	1	0
Thomas	2020	103	NS	70	33	24	3	2	4
Wei (2)	2020	7560	NS	3063	4587	NS	NS	NS	NS
Liu	2019	131	16.1	59	72	72	0	0	0
Stib	2020	651	NS	500	151	NS	NS	NS	NS
Ye	2020	209	NS	109	100	NS	NS	NS	NS
Ma	2020	846	NS	360	486	NS	NS	NS	NS
Koh	2020	200	22.4	102	98	97	0	0	1
Kwon	2020	762	NS	325	437	437	0	0	0
Kim	2019	218	12	132	86	86	0	0	0
Zhao	2020	177	21.8	96	81	81	0	0	0
Qin	2019	248	NS	115	133	NS	NS	NS	NS
Zhu	2021	NS	NS	57	45	NS	NS	NS	NS
Liu (2)	2019	450	NS	128	322	NS	NS	NS	NS
Xia	2019	180	10.3	85	95	91	4	0	0
Zhao	2021	106	17.3	73	33	NS	NS	NS	NS
Lee	2019	589	12.9	193	396	395	1	0	0
Ataide	2020	99	NS	17	82	NS	NS	NS	NS
Chen	2020	1558	NS	347	1211	NS	NS	NS	NS
Zhu (2)	2021	1032	NS	502	530	NS	NS	NS	NS
Shi	2020	1937	NS	1032	905	NS	NS	NS	NS
Barczyński	2020	NS	30.5	40	10	10	0	0	0
Zhang	2020	365	18.3	179	186	168	11	7	0
Wei (3)	2020	204	15	112	92	90	1	0	1
Colakoglu	2019	235	NS	133	102	102	0	0	0
Park	2021	325	21	257	68	NS	NS	NS	NS
Nguyen	2020	NS	NS	11	50	NS	NS	NS	NS
Sun	2020	550	14	128	422	NS	NS	NS	NS
Peng	2021	2775	NS	2472	303	299	4	0	0
Liu	2021	175	11.9	67	108	103	5	0	0
Han	2021	454	17.8	287	167	161	4	2	0
Shin	2020	348	31	252	96	0	96	0	0
Wang	2019	NS	18.5	95	181	NS	NS	NS	NS
Zhu	2019	467	8.3	128	339	NS	NS	NS	NS
Zhang (2)	2019	2064	NS	1314	750	NS	NS	NS	NS
Ko	2019	150	12.9	50	100	NS	NS	NS	NS
Song	2019	100	NS	50	50	NS	NS	NS	NS
Li	2019	154	NS	70	84	NS	NS	NS	NS
Wildman-Tobriner	2019	100	27.1	85	15	NS	NS	NS	NS
Yu	2017	50	NS	33	17	16	0	1	0
Buda	2019	99	27	84	15	NS	NS	NS	NS
Raghavendra	2018	344	NS	288	56	NS	NS	NS	NS
Li	2018	NS	NS	50	250	250	0	0	0
Ma	2017	8148	25	4126	4022	NS	NS	NS	NS
Raghavendra	2017	242	NS	211	31	NS	NS	NS	NS
Zhu	2013	689	13.3	265	465	NS	NS	NS	NS
Choi	2017	102	12	59	43	43	0	0	0
Gao	2017	342	12.1	103	239	NS	NS	NS	NS
Choi	2015	99	NS	21	78	77	1	0	9
Chi	2017	NS	NS	11	50	NS	NS	NS	NS
Jeong	2019	100	17	56	44	43	1	0	0
Acharya	2012	20	NS	10	10	7	1	0	2
Liang	2018	95	16	43	52	51	1	0	0
Prochazka (2)	2019	60	NS	40	20	NS	NS	NS	NS
Song	2015	155	NS	76	79	NS	NS	NS	NS
Ardakani	2015	60	NS	26	34	NS	NS	NS	NS
Guan	2019	399	NS	190	209	209	0	0	0
Xia	2017	203	24.8	114	89	NS	NS	NS	NS
Yoo	2018	117	15	67	50	50	0	0	0
Tsantis	2009	85	NS	54	31	NS	NS	NS	NS
Liu	2008	41	NS	21	20	18	0	0	2
Acharya	2013	20	31.7	10	10	7	1	0	2
Acharya (2)	2012	20	31.7	10	10	7	1	0	2
Acharya	2011	20	31.7	10	10	7	1	0	2
Kweon Seo	2017	230	29.4	191	39	0	39	0	0
Ardakani (2)	2015	60	NS	26	34	NS	NS	NS	NS
Wu	2016	970	NS	463	507	487	12	4	4
Cao	2019	120	NS	73	47	NS	NS	NS	NS
Wang (2)	2020	3120	NS	1393	1841	NS	NS	NS	NS
Sun (2)	2020	245	NS	145	100	NS	NS	NS	NS
Reverter	2019	300	29.8	165	135	112	15	3	5
Gitto	2019	62	18	48	14	NS	NS	NS	NS

NS: not specified, Ca: cancer.