Table 2. Pairwise agreement (kappa; standard error) between adjudicators, by country.

		Adjudicator pair
Country	Study arm	1	2	3	4	5	6
Netherlands	Screen	0.92 (0.04)	0.85* (0.03)	0.94 (0.03)	0.81 (0.05)	0.88* (0.04)	–
	Control	0.89 (0.05)	0.87 (0.04)	0.93 (0.04)	0.84 (0.05)	0.83 (0.05)	–
	Overall	0.91 (0.03)	0.87* (0.02)	0.94 (0.02)	0.84 (0.03)	0.86 (0.03)	–
Belgium	Screen	0.92 (0.05)	0.89 (0.04)	0.86 (0.06)	0.93 (0.04)	0.89 (0.06)	0.92 (0.04)
	Control	0.89 (0.05)	0.89 (0.04)	0.92 (0.04)	0.91 (0.04)	0.97 (0.03)	0.95 (0.03)
	Overall	0.91 (0.03)	0.89 (0.03)	0.89 (0.04)	0.92 (0.03)	0.93 (0.03)	0.93 (0.03)
Sweden	Screen	0.95 (0.02)	0.93 (0.03)	0.97 (0.02)	–	–	–
	Control	0.94 (0.03)	0.89 (0.03)	0.90 (0.03)	–	–	–
	Overall	0.94 (0.02)	0.91 (0.02)	0.94 (0.02)	–	–	–
Finland	Screen	0.90 (0.03)	0.85 (0.04)	0.89 (0.04)	–	–	–
	Control	0.89 (0.03)	0.86* (0.03)	0.92* (0.03)	–	–	–
	Overall	0.89 (0.02)	0.86* (0.03)	0.91 (0.02)	–	–	–
Switzerland	Screen	0.81 (0.13)	0.69 (0.17)	0.73 (0.11)	0.92 (0.08)	0.83 (0.12)
	Control	0.31 (0.17)	0.49* (0.14)	0.75 (0.12)	1.00 (−)	1.00 (−)
	Overall	0.57 (0.11)	0.60 (0.11)	0.74 (0.08)	0.93 (0.07)	0.86 (0.10)

*P<0.05 on McNemar symmetry test.