Table 4 Descriptive statistics and group comparisons for the heart rate and oxygen saturation.

From: Exploring the clinical relevance of vital signs statistical calculations from a new-generation clinical information system

Heart rate parameters

Mean

SD

SpO2 parameters

Mean

SD

Severe acidosis group (bicarbonate < 10 meq/L)

(n = 226)

(n = 216)

 nHR

120*

20.6

nSpO2

99.3*

1.1

 pHR-mode

119*

21.5

SpO2 mode

99.6*

0.8

 pHR-mean

120*

20.8

SpO2 mean

99.4*

0.8

 pHR-median

120*

21.1

SpO2 median

99.5*

0.8

 pHR-maximum

135*

22.9

SpO2 maximum

99.9*

0.3

 pHR-minimum

111*

21.2

SpO2 minimum

97.1#

4.0

Clinical improvement group (bicarbonate ≥ 10 meq/L)

(n = 799)

(n = 764)

 nHR

103*

21.9

nSpO2

98.6*

1.4

 pHR-mode

102*

22.5

SpO2 mode

98.6*

1.5

 pHR-mean

104*

22.3

SpO2 mean

98.5*

1.3

 pHR-median

103*

22.4

SpO2 median

98.6*

1.4

 pHR-maximum

118*

24.6

SpO2 maximum

99.6*

0.8

 pHR-minimum

93*

21.8

SpO2 minimum

96.0#

3.9

  1. nHR heart rate recorded by nurses, pHR hourly calculation of the pulse-based heart rate, nSpO2 oxygen saturation recorded by nurses. There were statistically significant differences between the groups for all the monitored parameters (*) p < 0.001, (#) p = 0.001. Note how there was a significant intragroup oscillation in the HR (the maximum and minimum values differed by ≈ 25 bpm). The evolution of the electrical heart rate (eHR) by groups was not provided because it was identical to that of the pHR.
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