Table 3.

Kappa subgroup analyses.

		Kappa	Confidence Interval	Number of Participants	Agreement	p value
Disability Rating (mODI)	Minimal disability	0.667	0.367–0.966	27	Substantial	<.001
	Moderate to severe disability	0.475	0.097–0.853	23	Moderate	0.016
Chronicity of symptoms	Acute and Subacute	0.462	0.122–0.801	18	Moderate	0.011
	Chronic	0.765	0.464–0.999	21	Substantial	<.001