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Table 1 Clinical characteristics of patients and SPNs

From: Differentiation of primary lung cancer from solitary lung metastasis in patients with colorectal cancer: a retrospective cohort study

 

LC (n = 70)

LM (n = 129)

P value

Age (years)

68.5 ± 8.15

64.6 ± 10.7

0.004

 Male (years)

69.8 ± 6.56

65.3 ± 9.9

 

 Female (years)

66.3 ± 10.1

63.1 ± 12.2

 

Sex (male/female)

44/26

87/42

0.515

History of smoking

37 (52.9)

49 (38)

0.043

Index tumor location

  

0.003

 Colon

41 (58.6)

47 (36.4)

 

 Rectum

29 (41.4)

82 (63.6)

 

Index tumor stage

  

< 0.001

 Stages I–II

53 (75.7)

29 (22.5)

 

 Stages III–IV

17 (24.3)

100 (77.5)

 

Chronicity of SPNs

  

0.004

 Synchronous

18 (25.7)

13 (10.1)

 

 Metachronous

52 (74.3)

116 (89.9)

 

Histopathology of SPNs

 

129 (100)

++N/A

 Metastatic

 

 Adenocarcinoma

55 (78.6)

 Squamous cell carcinoma

14 (20)

 Small cell carcinoma

1 (1.4)

  1. Values in parentheses are percentages. Values are presented as mean ± standard deviation where applicable. Note: significant P values are shown in bold
  2. LC lung cancer, LM lung metastases, SPN solitary pulmonary nodule, CRC colorectal cancer
  3. ++N/A, not applicable