Table 3:

Distribution of patients (cases) enrolled, number of parathyroid glands (PGs) visualized per patient and number of frozen section analysis (FSA) performed per case at the 3 study sites. All participant surgeons visually confirmed PGs solely based on their surgical experience and remained blinded to output from PTeye®.

Site	Surgeon	Surgeon experience at time of study	Thyroid procedures per annum	Parathyroid + combined procedures per annum	All procedures				Thyroid procedures			Parathyroid + combined procedures
					Cases	Number of PGs*	PGs per case*	FSA per case	Cases	PGs per case*	FSA per case	Cases	PGs per case*	FSA per case
Site 1	Surgeon A	> 10 years	93	97	28	62	2.21	0.57	11	2.09	0.00	17	2.29	0.94
	Surgeon B	< 5 years	28	23	11	28	2.55	0.73	6	2.50	0.00	5	2.60	1.60
	Total				39	90	2.31	0.62	17	2.24	0.00	22	2.36	1.09
Site 2	Surgeon C	> 10 years	121	82	38	62	1.63	0.39	23	1.91	0.09	15	1.20	0.93
	Surgeon D	< 5 years	113	44	12	23	1.92	0.00	10	2.10	0.00	2	1.00	0.00
	Total				50	85	1.70	0.30	33	1.97	0.06	17	1.18	0.81
Site 3	Surgeon E	> 10 years	140	130	50	141	2.82	0.32	30	2.63	0.10	20	3.10	0.65
	Surgeon F	< 5 years	80	54	28	70	2.50	0.39	13	2.23	0.08	15	2.73	0.67
	Total				78	211	2.71	0.35	43	2.51	0.09	35	2.94	0.66
Overall	All surgeons	> 10 years	354	309	116	265	2.28	0.41	64	2.28	0.08	52	2.29	0.81
	All surgeons	< 5 years	221	121	51	121	2.37	0.37	29	2.24	0.03	22	2.55	0.82
	Total				167	386	2.31	0.40	93	2.27	0.06	74	2.36	0.81

^*Total number of confirmed PGs: in-situ PGs identified by surgeons with moderate-to-high confidence + excised PGs validated with histology.