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Table 1 Demographic characteristics of the anal fissure study cohort

From: The epidemiology and treatment of anal fissures in a population-based cohort

  Male   Female  
Description N % N %
Sex (row%) 522 42.0% 721 58.0%
Mean age (years)* 46.6 40.9
Age categories (column%)     
Age 6 - 11 34 6.5% 48 6.7%
Age 12 - 17 20 3.8% 48 6.7%
Age 18 - 24 38 7.3% 107 14.8%
Age 25 - 34 63 12.1% 134 18.6%
Age 35 - 44 81 15.5% 86 11.9%
Age 45 - 54 83 15.9% 101 14.0%
Age 55 - 64 94 18.0% 82 11.4%
Age 65+ 109 20.9% 115 16.0%
Ethnicity     
Hispanic (row%) 249 42.9% 331 57.1%
Mean age (years) 44.6 38.1
Non-Hispanic (row%) 273 41.2% 390 58.8%
Mean age (years) 48.3 43.3
  1. *Mean difference significant P < 0.001.