Table 2.

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

		Second 24-hour ABPM (ABPM2)		Reproducibility
		Daytime hypertension	No daytime hypertension	Kappa	95% CI
First 24-hour ABPM (ABPM1)	Daytime hypertension	54	17	0.66	0.55–0.76
	No daytime hypertension	19	192

The data are expressed as the number of participants, and kappa statistic with 95% CI. Bolded numbers represent the number of participants with concordant results across the 2 ABPM recordings. Daytime hypertension is defined as mean awake systolic/diastolic blood pressure ≥135/85mm Hg.