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Table 1 Patient demographics and clinical characteristics (n = 595)

From: Clinicopathologic predictors of metastasis of different regional lymph nodes in patients intraoperatively diagnosed with stage-I non-small cell lung cancer

Characteristics

Value

Age (years)

Median (Interquartile range)

60 (25–87)

  ≤ 60

301 (50.6%)

  > 60

294 (49.4%)

Sex

 Female

304 (51.1%)

 Male

291 (48.9%)

Maximum diameter of tumor

  ≤ 1.6 cm

304 (51.1%)

  > 1.6 cm

284 (47.7%)

 Missing

7 (1.2%)

Position

 Right Upper Lobe

181 (30.4%)

 Right Middle Lobe

28 (4.7%)

 Right Lower Lobe

84 (14.1%)

 Left Upper Lobe

135 (22.7%)

 Left Lower Lobe

87 (14.6%)

 Ipsilateral Mixed lobes

48 (8.1%)

 Bilateral Mixed lobes

26 (4.4%)

 Missing

6 (1.0%)

Pathological type

 Adenocarcinoma

442 (74.3%)

 Squamous cell carcinoma

62 (10.4%)

 Adenocarcinoma in situ

73 (12.3%)

 Others

16 (2.7%)

 adenosquamous carcinoma

4

 large cell neuroendocrine lung cancer

3

 metastatic colorectal cancer

1

 carcinoid

5

 sclerosing pneumocytoma

1

 lymphlepithelioma

1

 metastatic papillary thyroid cancer

1

 Missing

2 (0.35%)

Tumor differentiation

 No

28 (4.7%)

 I

125 (21.0%)

 I-II

82 (13.8%)

 II

139 (23.4%)

 II-III

137 (23.0%)

 III

61 (10.3%)

 Missing

23 (3.9%)

Pathological morphology

 No

210 (35.3%)

 lepidic

37 (6.2%)

 Acinar

178 (29.9%)

 Micropapillary

4 (0.7%)

 Papillary

85 (14.3%)

 solid

53 (8.9%)

 Missing

28 (4.7%)

Pulmonary membrane invasion

 No

431 (72.4%)

 Yes

58 (9.7%)

 Missing

106 (17.8%)

Bronchial mucosa and cartilage invasion

 No

540 (90.8%)

 Yes

54 (9.1%)

 Missing

1 (0.2%)

Vascular invasion

 No

548 (92.1%)

 Yes

44 (7.4%)

 Missing

3 (0.5%)

Nerve invasion

 No

581 (97.6%)

 Yes

13 (2.2%)

 Missing

1 (0.2%)

CEA

  ≤ 2.21 ng/ml

253 (42.5%)

  > 2.21 ng/ml

254 (42.7%)

 Missing

88 (14.8%)

Albumin

  ≤ 43.1 g/l

289 (48.6%)

  > 43.1 g/l

288 (48.4%)

 Missing

18 (3.0%)