Table 2

Univariate Association of Candidate Predictors With Chronic Abdominal Pain

PredictorCAP (n = 105)No CAP (n = 178)Original OR (95% CI)aPooled OR (95% CI)bP Valuec
Candidate positive predictors
 Age, mean (SD), y8.8 (3.2)8.0 (2.7)1.10 (1.02–1.20)1.09 (1.00–1.18).05
 Sex, female, No. (%)73 (69.5)104 (58.4)1.62 (0.97–2.71)1.47 (0.89–2.44).14
 Dyspepsia, No. (%)53 (50.5)74 (44.0)1.30 (0.79–2.11)1.27 (0.78–2.06).33
 Waking up at night because of pain, No. (%)53 (50.5)56 (31.5)2.22 (1.35–3.65)2.08 (1.29–3.36).003
 Overweight, No. (%)d15 (14.3)13 (7.3)2.12 (0.96–4.64)1.81 (0.82–4.00).14
 High level of other somatic symptoms, No. (%)28 (26.7)20 (11.2)2.87 (1.52–5.42)2.58 (1.38–4.82).003
 CAP at baseline, No. (%)58 (55.2)73 (41.0)1.78 (1.09–2.89)1.63 (1.01–2.62).04
 Parent with functional GI complaints, No. (%)37 (35.6)49 (28.0)1.42 (0.85–2.39)1.60 (0.88–2.90).13
Candidate negative predictors
 Vomiting, No. (%)16 (15.2)30 (16.9)0.89 (0.46–1.72)0.91 (0.47–1.75).77
 Fever, No. (%)20 (19.0)28 (15.7)1.26 (0.67–2.37)1.23 (0.65–2.31).52
 Dysuria, No. (%)8 (7.6)9 (5.1)1.55 (0.58–4.15)1.36 (0.31–3.62).53
 Blood on stools, No. (%)3 (2.9)4 (2.3)1.27 (0.28–5.80)1.15 (0.25–5.29).86
 Epigastric pain, No. (%)5 (4.9)20 (12.6)0.36 (0.13–0.99)0.45 (0.18–1.10).08
  • CAP = chronic abdominal pain; GI = gastrointestinal; OR = odds ratio.

  • a Original data set ORs.

  • b Pooled ORs after multiple imputation.

  • c P values of imputed data.

  • d According to body mass index using child-adjusted cutoff points.21