Table 2.

Mean difference and correlation between screening measurements and 24 h-ABPM values (reference).

BP	Mean (SD)	Mean difference (95% CI)	P	Correlation coefficient (CI)	P
Standard BP (systolic)	144 (25)
Average	128 (20)	−16 (−17 to −14)	<0.0001	0.73 (0.67–0.78)	<0.0001
Daytime	131 (20)	−13 (−15 to −11)	<0.0001	0.70 (0.64–0.76)	<0.0001
Nighttime	123 (21)	−21 (−24 to −19)	<0.0001	0.61 (0.53–0.68)	<0.0001
Standard BP (diastolic)	87 (14)
Average	81 (13)	−6 (−7 to −4)	<0.0001	0.67 (0.60–0.73)	<0.0001
Daytime	85 (13)	−2 (−4 to −1)	0.00052	0.66 (0.59–0.73)	<0.0001
Nighttime	76 (14)	−11 (−12 to −9)	<0.0001	0.57 (0.48–0.64)	<0.0001
1st uABP (systolic)	140 (26)
Average	128 (20)	−12 (−14 to −10)	<0.0001	0.81 (0.76–0.85)	<0.0001
Daytime	131 (20)	−9 (−10 to −7)	<0.0001	0.81 (0.76–0.84)	<0.0001
Nighttime	123 (21)	−17 (−20 to −15)	<0.0001	0.68 (0.61–0.74)	<0.0001
1st uABP (diastolic)	86 (16)
Average	81 (13)	−4 (−6 to −3)	<0.0001	0.72 (0.66–0.77)	<0.0001
Daytime	85 (13)	−1 (−2 to 0.3)	0.12	0.73 (0.67–0.78)	<0.0001
Nighttime	76 (14)	−10 (−11 to −8)	<0.0001	0.62 (0.54–0.68)	<0.0001
2nd uABP (systolic)	135 (25)
Average	128 (20)	−7 (−9 to −5)	<0.0001	0.80 (0.75–0.84)	<0.0001
Daytime	131 (20)	−4 (−6 to −2)	<0.0001	0.80 (0.76–0.84)	<0.0001
Nighttime	123 (21)	−12 (−15 to −10)	<0.0001	0.69 (0.63–0.75)	<0.0001
2nd uABP (diastolic)	84 (16)
Average	81 (13)	−2 (−4 to −1)	0.00041	0.69 (0.63–0.75)	<0.0001
Daytime	85 (13)	1 (−0.4 to 2.3)	0.17	0.69 (0.63–0.75)	<0.0001
Nighttime	76 (14)	−8 (−9 to −6)	<0.0001	0.59 (0.50–0.66)	<0.0001

BP: blood pressure; uABP: unattended blood pressure; 24 h-ABPM: 24 h ambulatory blood pressure monitor; CI: confidence interval.