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Table 1 Characteristics of the study population

From: Genetic polymorphisms of MMP1, MMP3 and MMP7gene promoter and risk of colorectal adenoma

  Large adenomas Small adenomas Polyp free controls
N 295 302 568
Age, mean (SD) 62.3 (13.1) 60.6 (12.1) 60.7 (12.4)
Sex ratio (male/female) 1.68 1.24 1.52
  1. SD; standard deviation