Table 3.

Abstractor-specific intra-rater reliability coefficients

		Kappa*
Abstractors	Percentage agreement (%)	κ	95% CI
1	88	0.21	(0.02–0.40)
2	85	0.71	(0.62–0.80)
3	91	0.79	(0.74–0.84)
4	94	0.83	(0.79–0.87)
5	96	0.89	(0.85–0.92)
6	94	0.78	(0.66–0.89)
7	93	0.78	(0.72–0.84)
8	79	0.57	(0.50–0.63)
9	88	0.66	(0.57–0.75)
10	98	0.94	(0.92–0.96)

* Chi-square test statistic for homogeneity = 238, df = 9, p < 0.0001

Abbreviations: κ kappa statistic, CI confidence interval