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Table 1 General characteristics of subjects

From: Methylenetetrahydrofolate reductase C677T polymorphism in patients with lung cancer in a Korean population

Characteristics

Cases n (%)

Controls n (%)

No.

3938

1700

Age(mean ± SD)*

64.8 ± 9.6

52.2 ± 14.3

   ≤65 years

1803 (45.8)

1308 (76.9)

   > 65 years

2135 (54.2)

392 (23.1)

Gender*

  

   Male

3128 (79.4)

821 (48.3)

   Female

810 (20.6)

879 (51.7)

Smoking status*

  

   Never

900 (22.8)

1000 (58.8)

   Ever

2951 (74.9)

655 (38.5)

   unknown

87 (2.2)

45 (2.6)

Histological type

  

   ADC

1523 (38.7)

 

   SQC

1519 (38.6)

 

   SCLC

574 (14.6)

 

   Others

322 (8.2)

 
  1. SD, standard deviation; ADC, adenocarcinoma; SQC, squamous cell carcinoma;
  2. SCLC, small cell lung cancer; others, large cell carcinoma and mixed types; *, p < 0.01.