Table 3 Comparing the ranges of error of blood pressure readings between and within the study and control groups

Systolic pre

196.4 ± 14.3

187.6 ± 6.9

Z^a=-2.31, p = 0.021*

188.1 ± 7

Z^a= -2.1, p = 0.04*

−8.8 ± 6.9

−8.3 ± 7

Z^a = −0.480, p = 0.631

Study (35)

(1) 2.9%

(34) 97.1%

χ²=0.000

P = 1.00

Control (35)

(1) 2.9%

(34) 97.1%

Systolic post

196.4 ± 14.3

196.2 ± 5.4

Z^a= −0.13, p = 0.899

187.5 ± 6.6

Z^a = −2.01, p = 0.04*

−0.20 ± 5.4

−8.9 ± 6.6

Z^a = -5.73, p < 0.0001*

Study (35)

(20) 57.1%

(15) 42.9%

χ²=18.7

P = <0.0001*

Control (35)

(3) 8.5%

(32) 91.5%

Sig^b

Z = −4.9, p < 0.0001*

Z = −1. 29, p = 0.20

Diastolic pre

106.8 ± 9.1

102 ± 3.8

t = −2.14, df = 38, p = 0.039*

102.8 ± 2.7

t = 2.15, df = 38, p = 0.038*

−4.8 ± 3.8

−4 ± 2.7

t = −0.963, df = 68, p = 0.339

Study (35)

(9) 25.7%

(26) 74.3%

χ²=0.324

P = 0.569

Control (35)

(7) 20.0%

(28) 80.0%

Diastolic post

106.8 ± 9.1

104.6 ± 1.19

t = −1.43, df = 38, p = 0.16

103 ± 2.5

t = 2.09, df = 38, p = 0.04*

−2.2 ± 1.19

3.8 ± 2.5

t = 3.49, df = 68, p = 0.001*

Study (35)

(17) 48.5%

(18) 51.5%

χ²=5.04

P = 0.025*

Control (35)

(8) 22.8%

(27) 77.2%

Sig⁺⁺

t = 4.13, df = 34, p = 0.0002*

t = −0.394, df = 34, p = 0.696