Table 2 Descriptive statistics, correlations, and concordances between the manual nursing records and automatic statistical calculations.

	Mean	SD	Correlation	Concordance correlation coefficient			Paired student t-test
	Mean	SD	Correlation	CCC	Precision	Accuracy	Paired student t-test
nHR (N = 1025)	107	22.8	(Spearman)		(Pearson)	Bias correction factor
pHR-mode	106	23.3	0.982	0.981	0.981	0.999	p < 0.001
pHR-mean	107	23	0.980	0.981	0.981	1	p < 0.001
pHR-median	107	23.1	0.982	0.982	0.982	1	p = 0.964
pHR-maximum	122	24.9	0.928	0.765	0.921	0.84	p < 0.001
pHR-minimum	97	22.9	0.935	0.839	0.915	0.918	p < 0.001
eHR-mode	106	23.4	0.978	0.977	0.979	0.999	p < 0.001
eHR-mean	107	23.2	0.977	0.977	0.977	1	p = 0.01
eHR-median	106	23.2	0.980	0.98	0.98	1	P = 0.112
eHR-maximum	121	24.5	0.923	0.768	0.916	0.838	p < 0.001
eHR-minimum	97	23.7	0.967	0.891	0.961	0.927	p < 0.001
nRR (n = 716)	23	7.3	(Spearman)		(Pearson)
iRR-mode	23	9.5	0.739	0.54	0.56	0.964	p = 0.055
iRR-mean	26	8.7	0.636	0.501	0.542	0.925	p < 0.001
iRR-median	24	8.9	0.706	0.543	0.558	0.972	p < 0.001
iRR-maximum	44	18.7	0.324	0.086	0.256	0.337	p < 0.001
iRR-minimum	17	5.6	0.644	0.404	0.632	0.639	p < 0.001
nSpO₂ (n = 980)	98.8	1.3	(Spearman)		(Pearson)
SpO₂-mode	98.8	1.4	0.79	0.817	0.819	0.998	p = 0.004
SpO₂-mean	98.6	1.3	0.759	0.784	0.789	0.994	p < 0.001
SpO₂-median	98.8	1.4	0.775	0.816	0.817	0.999	p = 0.172
SpO₂-maximum	99.7	0.7	0.6	0.418	0.659	0.633	p < 0.001
SpO₂-minimum	96.2	3.9	0.523	0.081	0.181	0.447	p < 0.001

nHR hourly heart rate recorded by nurses, pHR automatic hourly calculation of the heart rate through pulse oximetry, eHR automatic hourly calculation of the heart rate through electrocardiography, nRR hourly respiratory rate recorded by nurses, iRR automatic hourly calculation of the respiratory rate through impedance, nSpO₂ hourly oxygen saturation recorded by nurses, SpO₂ automatic hourly oxygen saturation calculation through pulse oximetry. The Student t-test results indicated that the best correlation with the nursing values was obtained with the median for heart rate and oxygen saturation and with the mode for the respiratory rate.

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