Table 2. IRR Values of Studies in the Systematic Review.

	% User Agreement	Kappa	% data that are reliable (through Cohen’s Kappa Test)	Level of Agreement
Sample Size	80%	0.304	9.24%	Minimal
Control	97%	0.788	62.10%	Moderate
Blinding Operator	100.00%	1	100%	Almost Perfect
Single Operator	94%	0.693	40.80%	Moderate
Standardized Sample Prep	74.30%	0.457	20.90%	Weak