Table 4.

Studies reporting on the inter- and intraoperator variability of the Clarity system (TAUS) or the Clarity Autoscan system (TPUS). The first column details the first author and publication year. ∗ indicates that the detailed results were discussed in the review paper [11] as well, while Δ highlights that these specific results were not discussed, but the paper was included in the previous review. The second column specifies the used system, while the third and fourth column provide the number of compared operators and their experience, respectively. In the fifth column the number of examined patients is specified, while in the sixth column the number of matches made by the operators is detailed. The seventh column explains the metric that was used to quantify the intraoperator variability (column eight) and the interoperator variability (column nine).

First author	System	# operators	Experience	# pts	# matches	Metric	Intra			Inter
							AP	LR	SI	AP	LR	SI
Van der Meer∗ (2013) [17]	TAUS	2 (intra) 3 (inter)	-	13	817	SD (mm)	0.7	0.8	1	1.4	1.3	1.8
FiandraΔ (2014) [32]	TAUS	2	Expert (>5 years)	10	60	Mean ± SD of operator Δ (mm)	-	-	-	−0.1 ± 1.4	−0.4 ± 1.2	0.1 ± 1.3
		5	>1 year	10	150	Root mean square error with respect to expert [mm]	-	-	-	2.1 ± 2.1	1.3 ± 1.7	1.7 ± 1.7
		4	<1 year	10	120		-	-	-	3.1 ± 2.7	2.7 ± 2.7	3.2 ± 3.2
Pang (2017) [33]	TPUS	7	All operators	10	70	Δ between operator and total group median [mm] in all directions	≤2 in 93.3% of the time			≤2 in 93.8% of the time
		5	9–16 months	10	50		≤2 in 96.7% of the time			-
		2	4–9 months	10	20		≤2 in 60% and 80% of the time			-