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Table 1 Characteristics of 164 patients with IBS included in the analyses.

From: How does comorbidity affect cost of health care in patients with irritable bowel syndrome? A cohort study in general practice

Variables  
Age (years), mean (SD) 52 (15.1)
Female gender 69%
Gastro-esophageal reflux (Rome II definition) 43%
Dyspepsia (Rome II definition) 9%
Duration IBS complaints (> 1 year) 85%
Duration IBS in years, mean (SD) 17 (15)
IBS-severity (mild/moderate/severe) 36%/52%/12%
Education > 10 years 63%
Mood disorder (SCL 10 > 1.85) 37%
Number of organic diseases, mean (SD) 2.0 (1.8)
Smokers 35%
Alcohol use (> 2 occasions/week) 18%
SHC-17, mean (SD) 13.2 (8.2)
EPQ, mean (SD) 4.0 (2.9)
Whitley, mean (SD) 25.9 (8.2
SCL-10, mean (SD) 1.8 (0.6)
  1. Results are reported as percentages if not otherwise specified.