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Table 4 Results of subgroup meta- analyses for Campylobacter and irritable bowel syndrome from studies published prior to July 2011

From: Systematic review and meta-analysis of the proportion of Campylobacter cases that develop chronic sequelae

Variable Summary Estimate Lower 95% CI Upper 95% CI I2 Number of outcome measures
Overall Estimate 4.01% 1.41% 10.88% 99.2% 10
Study Directionality      
Prospective 8.64% 6.36% 11.66% 83.7% 8
Retrospective 0.15% 0.0048% 4.75% 99.4 2
Method of Assessing Sequelae      
Self-reported 5.27% 0.84% 26.84% 68.0% 2
Self-reported based on validated scale* 9.94% 7.90% 12.44% 73.6% 6
Based on medical records 0.15% 0.0048% 4.75% 99.4% 2
Group Size      
Small 13.56% 5.76% 28.74% 0.0% 2
Medium 4.96% 1.43% 15.79% 91.2% 2
Large 9.92% 7.52% 12.98% 83.6% 4
Extra large 0.15% 0.0048% 4.75% 99.4 2
  1. *Questionnaires using self-reported responses to Rome I/Rome II criteria.