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Table 4 Multivariate analysis of predictive factors for lymph node metastasis (preoperative model)

From: Predictive risk factors for lymph node metastasis in patients with resected non-small cell lung cancer: a case control study

Predictive factors

Pulmonary LN a metastasis (pN1+)

Mediastinal LN a metastasis (pN2+)

Any LN a metastasis (pN+) e

Central localization

P = 0.002 b

OR = 2.9 c

CI = 1.5–5.6 d

P = 0.06

OR2.0

CI = 0.9–4.1

P = 0.005

OR = 2.6

CI = 1.3–5.1

Increased tumor size

P = 0.043

OR = 1.2

CI = 1.0–1.3

P = 0.040

OR = 1.2

CI = 1.0–1.4

P = 0.005

OR = 2.5

CI = 1.3–4.4

  1. aLN Lymph node, bP P-Value, cOR Odds ratio, CI 95%, dCI Confidence interval, e Patients were divided in two groups according to tumor size (> 3 cm and ≤ 3 cm)