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Table 1 Number of people in the IBS and non-IBS cohorts by age and sex, January 1996 through June 2002

From: Migraine, fibromyalgia, and depression among people with IBS: a prevalence study

  IBS cohort Non-IBS cohort
  No. of People Percent No. of People Percent
Female     
   18–29 13,791 19.6 3,291 23.2
   30–39 16,435 23.3 3,409 24.1
   40–49 19,263 27.3 3,811 26.9
   50–64 18,837 26.7 3,430 24.2
   65+ 2,149 3.0 229 1.6
Total 70,475 100 14,170 100
Male     
   18–29 5,224 19.3 2,434 18.4
   30–39 6,972 25.7 3,094 23.4
   40–49 6,993 25.8 3,759 28.4
   50–64 6,925 25.5 3,638 27.5
   65+ 1,004 3.7 307 2.3
Total 27,118 100 13,232 100
Total     
   18–29 19,015 19.5 5,725 20.9
   30–39 23,407 24 6,503 23.7
   40–49 26,256 26.9 7,570 27.6
   50–64 25,762 26.4 7,068 25.8
   65+ 3,153 3.2 536 2.0
Total 97,593 100 27,402 100