Importance of sleep quality in functional abdominal pain disorder in pediatric patients.

The incidence of sleep problems is increasing in children, and they are thought to contribute to pain in functional abdominal pain disorder (FAPD). In this study, we aimed to evaluate the pattern of sleep disturbance in children with FAPD and identify the associated factors. We retrospectively analyzed patients aged 12-18 years who were diagnosed with FAPD based on the Rome IV criteria. To assess sleep problems, we used the Korean version of the Pittsburgh Sleep Quality Index (PSQI-K). To evaluate factors associated with sleep disturbances, we used the odds ratios (OR) estimated in logistic regression models. Among the 66 patients evaluated, 57.6% (38/66) had a total PSQI-K score > 5, indicating a significant disturbance in sleep, 52.6% (20/38) had irritable bowel syndrome (IBS), and 47.4% (18/38) had functional abdominal pain-not otherwise specified. The mean PSQI-K score was 7.2 ± 6.0, and longer sleep onset latency was noted (26.33 ± 19.44 min) in all patients than healthy controls. Almost all PSQI-K subscales scores were elevated in patients with IBS. In univariate analysis, abdominal pain score > 7 and IBS were associated with poor sleep quality. In multivariate analysis, only IBS was associated with sleep disturbance. A relatively large proportion of patients with FAPD had sleep problems and these were more common in patients with IBS. Thus, interventions for improving sleep quality should also be considered in patients with FAPD with severe abdominal pain and IBS.