Table 2.

Differences between Systolic and Diastolic BP Measured Using Intra-Arterial, Auscultatory, and Oscillometric Methods

	Systolic Mean ± SD	Diastolic Mean ± SD
Intra-arterial method	125.47 ± 21.39	64.59 ± 11.18
Auscultatory method	120.68 ± 19.57	66.07 ± 10.26
Difference	4.79 ± 5.54	−1.47 ± 4.71
p value*	t = 11.59 p = .000	t = −4.20. p = .000
Intra-arterial method	125.47 ± 21.39	64.59 ± 11.18
Oscillometric method	121.13 ± 19.04	73.91 ± 10.62
Difference	4.33 ± 12.11	−9.31 ± 7.98
p value*	t = 4.80. p = .000	t = −15.66. p = .000
Auscultatory	120.68 ± 19.57	66.07 ± 10.26
Oscillometric	121.13 ± 19.04	73.91 ± 10.62
Difference	−1.55 ± 9.52	−7.84 ± 7.38
p value*	t = −.64. p = .552	t = −14.24. p = .000

Note.

^*Paired samples t test.