Table 4 The summary of age and pack-years status in the whole cohort and in diagnosis groups.

From: POLCOVID: a multicenter multiclass chest X-ray database (Poland, 2020–2021)

  

Min.

1st quartile

Median

Mean ± SD

3rd quartile

Max.

#Missing

Age

All

0

49

63

60.24 ± 17.83

72

99

2086

NORMAL

17

40

58

54.32 ± 17.57

67

96

1273

PNEUMONIA

4

57

67

64.82 ± 15.86

76

96

545

COVID-19

0

54

67

64.45 ± 17.27

76

99

268

Pack-years

All

1

11.5

25

27.94 ± 20.18

39.5

114

68

NORMAL

1

10

13.5

17.66 ± 13.83

23.75

60

18

PNEUMONIA

5

20.75

33.5

36.48 ± 22.72

41.5

114

27

COVID-19

2

10

20

26.02 ± 17.66

32.5

80

23