Table 5.

Correlation with ambulatory blood pressure measurement (ABPM) for reliability/reproducibility studies across number of readings on each occasion and time of day

Study (first author; publication date)	Measurement schedule	Comparator	N	Correlation coefficient between home systolic/diastolic BP and the comparator measurement
				Number of readings on each occasion			Time of day
				All first measurements	All second measurements	All measurements	All morning measurements	All evening measurements	All measurements
Johannson (2010)	7 days (2 readings in the morning and 2 readings in the evening on each day)	24-hour ABPM Timing in relationship to SMBP unclear	464	0.89/0.87	0.89/0.87	0.89/0.87	0.87/0.85	0.88/0.87	0.89/0.87
Stergiou (1998)a	3 work days per week for 2 weeks (2 readings in the morning and 2 readings in the evening on each day)	Daytime ABPM Some ABPM first and some SMBP first, one after the other	189	0.59/0.64		0.62/0.67	0.62/0.67		0.66/0.70
Verberk (2006)	7 days (3 readings in the morning and 3 readings in the evening, with the first of each triplicate discarded)	Daytime ABPM Timing vs. SMBP unclear	216				0.63/0.65	0.58/0.60	0.65/0.66
		24-hour ABPM Timing vs. SMBP unclear	216				0.69/0.69	0.64/0.62	0.70/0.69

Abbreviation: SMBP, self-monitoring of blood pressure.

^aStudy reports first blood pressure (BP), first double (same as first morning), and day 1, rather than all measurements.