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Table 1 Frequency distribution of selected characteristics of study subjects According to case-control status

From: PARP-1 Val762Ala polymorphism is associated with reduced risk of non-Hodgkin lymphoma in Korean males

Characteristic Cases Controls P value
No.(%) 573 (100) 721 (100)  
Age, no.(%)    
15-49 y 179 (31.2) 201 (27.9)  
50-64 y 226 (39.4) 286 (39.7  
≥ 65 y 168 (29.3) 234 (32.5) 0.33
   Mean(yr.) ± SD 55.0 ± 14.6 56.0 ± 15.3  
   Range 15.0-90.0 17.0-82.5  
Sex    
Male 336 (58.6) 417 (57.8)  
Female 237 (41.4) 304 (42.2) 0.77
NHL tumor pathology    
   All B-cell lymphoma 451 NA NA
Diffuse large B-cell 330 NA NA
Marginal zone* 69 NA NA
Follicular 17 NA NA
Mantle cell 12 NA NA
Small lymphocytic 8 NA NA
Burkitt lymphoma 3 NA NA
OthersB 12 NA NA
   All T-cell lymphoma 122 NA NA
Peripheral T-cell 55 NA NA
OthersT 67 NA NA
  1. P values for differences in socio-demographic characteristics between cases and controls.
  2. NA indicates not applicable. Marginal zone* includes marginal zone B-cell lymphoma (n = 12) and mucosa-associated lymphoid tissue (MALT) (n = 57). OthersB includes B-cell prolymphocytic leukemia (n = 1) and undetermined B-cell lymphoma (n = 11). OthersT includes all T-cell lymphoma (n = 67) except for peripheral T-cell lymphoma.