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Table 1 Mean values (±SD) of physiological variables between the two days

From: Measurement precision and biological variation of cranial arteries using automated analysis of 3 T magnetic resonance angiography

Variable

Day 1

Day 2

P-value

Heart rate (beats/min)

63 (5)

64 (5)

0.250

Systolic blood pressures (mmHg)

121 (10)

116 (11)

0.028

Diastolic blood pressure (mmHg)

68 (8)

65 (8)

0.093

Mean arterial blood pressure (mmHg)

85 (7)

82 (8)

0.038

Respiratory frequency (breaths/min)

15 (3)

15 (3)

0.343

End-tidal pressure of CO2 (kPa)

4.8 (0.2)

4.7 (0.3)

0.348

Hematocrit

0.38 (0.03)

0.39 (0.03)

0.333

Hemoglobin (mmol/L)

8.1 (0.5)

8.2 (0.5)

0.264

  1. P-value: The paired samples t-test.