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Predictors of abdominal pain in schoolchildren: a 4-year population-based prospective study
A El-Metwally1, S Halder, D Thompson
1Aberdeen Pain Research Collaboration (Epidemiology Group), University of Aberdeen, Aberdeen, UK. a.el-metwally@abdn.ac.uk
Background:
Chronic abdominal pain (CAP) is common among schoolchildren, but risk factors for its onset are still largely unknown.
Aims:
To determine the frequency of onset of CAP in schoolchildren and investigate risk factors for its development.
Methods:
1411 schoolchildren aged 11-14 years were recruited from schools in North West England. Information was collected on recent pain symptoms and potential risk factors for developing CAP. Participants were followed up 1 and 4 years later and new episodes of CAP were identified.
Results:
22% reported new-onset abdominal pain at 1-year follow-up which persisted at 4-year follow-up (CAP). CAP was almost three times higher in girls than boys (34% vs 13%; chi(2): 26.0; p<0.001). In girls, reporting headache at baseline was the only predictive factor for CAP onset: those reporting headaches experienced a doubling in the risk of symptom onset (relative risk: 2.1; 95% confidence interval: 0.95 to 4.7). In contrast, in boys, development of CAP was independently predicted by daytime tiredness (3.0; 1.2 to 7.6), lack of school enjoyment (2.0; 0.95 to 4.2), adverse psychosocial exposures (2.3; 1.2 to 4.5) and taller stature (1.9; 0.8 to 4.5).
Conclusion:
Our results suggest that over 20% of adolescent schoolchildren experience new-onset non-self-limiting abdominal pain over a 1-year period. Future abdominal pain is predicted by previous somatic symptom reporting in girls and both somatic symptom reporting and psychosocial factors in boys. These risk factors indicate a possible mechanism for understanding the development of CAP, and might have important implications for both primary and secondary preventive strategies.
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