Table 4.

Cross-classification of ambulatory blood pressure categories based on nocturnal and daytime hypertension on two 24-hour ambulatory blood pressure monitoring (ABPM) recording periods

		Second 24-hour ABPM (ABPM2)				Reproducibility
		INH	IDH	DNH	DNN	Kappa	95% CI
First 24-hour ABPM (ABPM1)	INH	7	2	9	8	INH: 0.21	0.04–0.38
	IDH	2	6	7	6	IDH: 0.25	0.06–0.44
	DNH	5	4	37	4	DNH: 0.65	0.53–0.77
	DNN	10	7	1	167	DNN: 0.72	0.63–0.81

The data are expressed as the number of participants, and kappa statistic with 95% CI. Bolded numbers represent the number of participants who were classified in the same category across the 2 ABPM recordings.

Abbreviations: DNH, daytime and nighttime hypertension; DNN, daytime and nighttime normotension; IDH, isolated daytime hypertension; INH, isolated nocturnal hypertension.