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Table 1 Number of patients assigned to each category in both classifications and percentage of confirmed RT-PCR COVID-19 cases

From: Comparison of the RSNA chest CT classification system and CO-RADS system in reporting COVID-19 pneumonia in symptomatic and asymptomatic patients

  

PCR

Test value

P-value

Sig.

Negative

Positive

No. = 115

No. = 136

RSNA probability rater 1

Typical

7 (9.6%)

66 (90.4%)

56.221

0.000

HS

Indeterminate

26 (53.1%)

23 (46.9%)

Atypical

35 (66.0%)

18 (34.0%)

Negative

47 (61.8%)

29 (38.2%)

RSNA probability rater 2

Typical

23 (26.4%)

64 (73.6%)

23.947

0.000

HS

Indeterminate

32 (53.3%)

28 (46.7%)

Atypical

21 (72.4%)

8 (27.6%)

Negative

39 (52.0%)

36 (48.0%)

RSNA probability rater 3

Typical

15 (18.8%)

65 (81.2%)

44.139

0.000

HS

 

Indeterminate

27 (49.1%)

28 (50.9%)

Atypical

37 (77.1%)

11 (22.9%)

Negative

36 (52.9%)

32 (47.1%)

CO-RADS rater 1

1

48 (60.0%)

32 (40.0%)

55.532

0.000

HS

2

34 (69.4%)

15 (30.6%)

3

23 (54.8%)

19 (45.2%)

4

5 (20.8%)

19 (79.2%)

5

5 (8.9%)

51 (91.1%)

CO-RADS rater 2

1

39 (52.0%)

36 (48.0%)

24.254

0.000

HS

2

21 (72.4%)

8 (27.6%)

3

16 (57.1%)

12 (42.9%)

4

16 (50.0%)

16 (50.0%)

5

23 (26.4%)

64 (73.6%)

CO-RADS rater 3

1

39 (54.9%)

32 (45.1%)

34.104

0.000

HS

2

32 (74.4%)

11 (25.6%)

3

11 (55.0%)

9 (45.0%)

4

12 (40.0%)

18 (60.0%)

5

21 (24.1%)

66 (75.9%)

  1. Data are expressed in number and percentage. The probability of error (P-value) at 0.05 was considered significant (S), 0.01 and 0.001 are highly significant (HS), while > 0.05 are considered non-significant (NS)