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Table 2 Description of 547 lung cancer patients, Silkeborg Regional Hospital 2013–2018, and comparison of distributions in two periods 2013-2015 (247)  and 2016-2018 (300)

From: Increased use of diagnostic CT imaging increases the detection of stage IA lung cancer: pathways and patient characteristics

 

2013–2018 (547)

 

2013–2015 (247)

 

2016–2018 (300)

 
 

N

%

N

%

N

%

Outcome

Clinical TNM stage

  IA

119

21.8

34

13.8

85

28.3

  IB

42

7.7

13

5.3

29

9.7

  II

42

7.7

16

6.5

26

8.7

  IIIA

54

9.9

22

8.9

32

10.7

  IIIB-IIIC

57

10.4

27

10.9

30

10.0

  IV

208

38.0

116

47.0

92

30.7

  NA

25

4.6

19

7.7

6

2.0

   

Chi2(6) = 37.1; p < 0.001

   
   

Chi2(5) = 27.2; p < 0.001 (ex. NA)

   

Person characteristics and constitution

Age at diagnosis

   

Median

 

Median

 
   

70.7

 

70.8

 

  -59

66

12.1

27

10.9

39

13.0

  60–69

192

35.1

89

36.0

103

34.3

  70–79

216

39.5

97

39.3

119

39.7

   ≥ 80

73

13.3

34

13.8

39

13.0

   

Chi2(3) = 0.66; p = 0.88

   

Sex

  Male

293

53.6

132

53.4

161

53.7

  Female

254

46.4

115

46.6

139

46.3

   

Chi2(1) = 0.003; p = 0.96

   

Charlson comorbidity score

  0

235

43.0

106

42.9

129

43.0

  1

130

23.8

60

24.3

70

23.3

  2

83

15.2

41

16.6

42

14.0

  ≥ 3

99

18.1

40

16.2

59

19.7

   

Chi2(3) = 1.6; p = 0.67

   

Pack-years

  ≥ 40

252

46.1

116

47.0

136

45.3

  20–39

187

34.2

78

31.6

109

36.3

  10–19

41

7.5

18

7.3

23

7.7

  0–9

43

7.9

24

9.7

19

6.3

  NA

24

4.4

11

4.5

13

4.3

   

Chi2(4) = 3.0; p = 0.56

   
   

Chi2(3) = 3.0; p = 0.40 (ex. NA)

   

Morphology

  Small cell carcinoma

71

13.0

40

16.2

31

10.3

  Adenocarcinoma

269

49.2

110

44.5

159

53.0

  Squamous cell carcinoma

96

17.6

47

19.0

49

16.3

  NSCLC unspecified

67

12.2

33

13.4

34

11.3

  Other and NA

44

8.0

17

6.9

27

9.0

   

Chi2(4) = 7.3; p = 0.12

   

Referral

Initiation of referral

  General practice

310

56.7

143

57.9

167

55.7

  Hospital

237

43.3

104

42.1

133

44.3

   

Chi2(1) = 0.27; p = 0.60

   

Red flag symptoms (PPV, %)a

  0.0

169

30.9

70

28.3

99

33.0

  0.1–0.9

247

45.2

109

44.1

138

46.0

   ≥ 1

131

23.9

68

27.5

63

21.0

   

Chi2(2) = 3.5; p = 0.18

   

Diagnostics

  Initial imaging conclusion

  Suspicious for cancer

414

75.7

194

78.5

220

73.3

  Referral for follow-up

93

17.0

33

13.4

60

20.0

  Not suspicious

40

7.3

20

8.1

20

6.7

   

Chi2(2) = 4.4; p = 0.11

   

Index image

  CECT

105

19.2

37

15.0

68

22.7

  LDCT

73

13.3

11

4.5

62

20.7

  Xray

260

47.5

149

60.3

111

37.0

  None of the above

109

19.9

50

20.2

59

19.7

   

Chi2(3) = 46.4; p < 0.001

   

Imaging cascade

  CECT direct (includes 7 with PET)

87

15.9

28

11.3

59

19.7

  LDCT or ULDCT

71

13.0

9

3.6

62

20.7

  Xray then CECT

207

37.8

129

52.2

78

26.0

  Xray then LDCT

82

15.0

33

13.4

49

16.3

  Other

100

18.3

48

19.4

52

17.3

   

Chi2(4) = 61.9; p < 0.001

   

Clinical pathway

Pathway

  Lung cancer referral pathway

40

7.3

16

6.5

24

8.0

  Urgent referral pathway for non-specific serious symptoms

94

17.2

47

19.0

47

15.7

  LDCT pathway

73

13.3

11

4.5

62

20.7

  Not a defined clinical pathway

340

62.2

173

70.0

167

55.7

   

Chi2(3) = 35.5; p < 0.001

   

Timing of investigation and diagnosis

Days from investigation to diagnosis

  Less than 31

431

78.8

205

83.0

226

75.3

  31–60

33

6.0

12

4.9

21

7.0

  61–179

29

5.3

9

3.6

20

6.7

   ≥ 180

53

9.7

20

8.1

33

11.0

  NA

1

0.2

1

0.4

0

0.0

   

Chi2(4) = 6.8; p = 0.15

   
   

Chi2(3) = 5.6; p = 0.14 (ex. NA)

   
  1. aRed flag symptoms: none, cough, fatigue, dyspnoea, chest pain, loss of weight, loss of appetite, abnormal spirometry, thrombocytosis, and haemoptysis