n GM2AP mean ± SD (ng/mL) P value
All patients 48 1.60 ± 1.21  
Gender      
Male 33 1.16 ± 1.07 0.358
Female 15 1.13 ± 1.05  
Histology      
Adenocarcinoma 25 1.25 ± 1.22 0.009 *
Small cell lung cancer 15 1.48 ± 1.35  
Squamous cell carcinoma 4 2.27 ± 2.20  
Other type of carcinoma 4 2.99 ± 2.63  
Phatologic stage      
III 7 1.69 ± 1.54 0.312
IV 41 0.63 ± 0.38  
Table 1: Quantification of the GM2AP level in lung cancer patient urine samples by ELISA.