Table 3.

Agreement on Classification of Masked Hypertension

	Percent agreement	Kappa*	95% CI	P-value
Awake ABPM average, two occasions one week apart	70.5	0.40	0.31–0.49	<0.0001
24-hour ABPM average, two occasions, one week apart	67.9	0.36	0.27–0.45	<0.0001
Home BP monitoring (135/85 mm Hg threshold), two series of measurements one week apart	82.0	0.30	0.16–0.44	<0.0001
Home BP monitoring (130/85 mm Hg threshold), two series of measurements one week apart	78.7	0.41	0.29–0.53	<0.0001
Home BP (135/85 mm Hg threshold) and awake ABPM using the first set of measurements	72.1	0.36	0.27–0.45	<0.0001
Home BP (135/85 mm Hg threshold) and awake ABPM using the second set of measurements	68.8	0.30	0.21–0.39	<0.0001
Awake ABPM and 24-hour ABPM using the first set of measurements	91.9	0.84	0.79–0.89	<0.0001
Awake ABPM and 24-hour ABPM using the second set of measurements	93.6	0.87	0.82–0.92	<0.0001

^*A kappa of 0 indicates agreement no better than expected by chance; a kappa of 1 indicates perfect agreement.