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Table 1 Clinicopathological characteristics of the non-recurrent and recurrent groups

From: Decreased sphingomyelin (t34:1) is a candidate predictor for lung squamous cell carcinoma recurrence after radical surgery: a case-control study

Characteristics Non-recurrent
(n = 6)
Recurrent
(n = 5)
P-value
Median age (range) 70.5 (63–76) 78.0 (65–82) 0.261
Sex (male/female) 5/1 5/0 1.000
Smoking history (+/−) 6/0 5/0 1.000
Median Brinkman index (range) 890 (180–3000) 1770 (920–2000) 0.493
Pathological stage (I/II) 4/1 4/2 0.545
Median tumor size (mm) (range) 19 (12–34) 40 (10–43) 0.159
Degree of differentiation    0.437
 Well 1 3  
 Moderate 4 1  
 Poor 1 1  
Lymph node metastasis (+/−) 1/5 1/4 1.000
Pleural invasion (+/−) 0/6 5/0 0.002*
Lymphatic vessel invasion (+/−) 1/5 5/0 0.015*
Blood vessel invasion (+/−) 3/3 5/0 0.182
Surgical procedure    0.455
 Lobectomy 6 4  
 Segmentectomy 0 1  
Adjuvant chemotherapy
 Indication (Stage IA3-IIB) 2 2 1.000
 Received 0 1 1.000
Recurrent style   
 Locoregional 3  
 Distant 2  
  1. *Two histopathological prognostic factors were significant in the recurrent group