Table 2.

Category-specific and overall intra-rater reliability coefficients

	Percentage agreement		Kappa
Category (number of items)	Category %	% range across items	Category κ	95% CI	κ range across items
1. Physical assessment (8)	94	91–98	0.84	(0.81–0.87)	0.72–0.90
2. Asthma control (7)	92	85–95	0.83	(0.80–0.86)	0.60–0.88
3. Spirometry (6)	95	91–97	0.84	(0.80–0.86)	0.78–0.94
4. Asthma education (8)	91	78–95	0.72	(0.68–0.76)	0.55–0.82
5. Asthma referrals (3)	94	92–93	0.59	(0.46–0.71)	0.44–0.65
6. Medications (1)	94	94	0.51	(0.27–0.75)	0.51
Overall	93		0.81*	(0.80–0.83)

* Chi-square test statistic for homogeneity = 47, df = 5, p < 0.0001

Abbreviations: κ kappa statistic, CI confidence interval