TABLE 3.

Interobserver agreement for the WHO simplified system: first trial of 25 eyes by Taylor et al. (219) following 3 h of training

Clinical signa	Kappa statistic for each of three trainees compared to the experienced opthalmologist			Average kappa statistic
	2	3	4
TF	0.80	0.91	0.60	0.77
TI	0.66	0.71	0.88	0.78
TS	0.73	0.39	0.27	0.46
TT	1.00	1.00	1.00	1.00
CO	1.00	0.63	0.83	0.82

^aSee Table 2, footnote a.