Quantification of pulmonary opacities using artificial intelligence in chest CT scans during SARS-CoV-2 pandemic: validation and prognostic assessment

Egyptian Journal of Radiology and Nuclear Medicine

Table 5 Spearman’s rho correlations for LOP and HOP in any lung by days of hospital admission

Spearman’s rho Correlations	COVID-19 negative patients		COVID-19 positive patients
Spearman’s rho Correlations	Days of Hospital admission	Percentage of low opacity	Days of Hospital admission	Percentage of low opacity
Days of Hospital admission
Correlation Coefficient	1.000	0.433	1,000	0.605
Sig. (2-tailed)		< 0.001		< 0.001
N	124	124	167	167
Percentage of low opacity (in any lung)
Correlation Coefficient	0.433	1.000	0.605	1.000
Sig. (2-tailed)	< 0.001		< 0.001
N	124	129	167	175

	Days of Hospital admission	Percentage of High opacity	Days of Hospital admission	Percentage of high opacity
Days of Hospital admission
Correlation Coefficient	1.000	0.438	1.000	0.596
Sig. (2-tailed)		< 0.001		< 0.001
N	124	124	167	167
Percentage of high opacity (in any lung)
Correlation Coefficient	0.438	1.000	0.596	1.000
Sig. (2-tailed)	< 0.001		< 0.001
N	124	129	167	175

Significance values lower than 0.05 and relevant Correlation Coefficients values are shown in bold
The upper half of the table shows Spearman’s rho correlations between LOP and days of hospital admission in Covid-19-negative and positive patients. The lower half shows Spearman’s rho correlations between HOP and days of hospital admission in Covid-19-negative and positive patients. LOP: low opacity percentage; HOP: high opacity percentage