Functional fecal retention with encopresis in childhood

Increased Incidence of Functional Constipation in Children with a History of Perianal Abscess-A Single-Center Retrospective Cohort Study

INTRODUCTION

 Functional constipation (FC) is a common gastrointestinal disorder affecting up to 30 % of children. Voluntary stool withholding (e.g., after painful defecation) with consecutive harder and larger stools can result in avoidance patterns. Perianal abscesses (PA) are associated with anal pain and painful stooling. We hypothesized that patients with PA have a higher incidence of subsequent FC compared with children without PA.

MATERIALS AND METHODS

 Between January 2010 and December 2016, we retrospectively analyzed all infants (< 365 days of life) presenting at our institution with PA or unilateral inguinal hernia repair (IH; control group). We screened the clinical charts of these patients for outpatient or inpatient visits due to FC according to ROME IV criteria between 01/2010 and 10/2019. Statistical analysis was done using chi-squared test.

RESULTS

 We included a total of 37 infants with PA and 118 with IH repair (controls). Mean age at presentation for PA was 3.7 ± 0.5 months compared with 4.2 ± 0.3 months at surgery for IH. In the PA group, 6/37 (16%) developed FC compared with 1/118 (1%) in the control group (p-value < 0.01). Patients with PA presented with FC at a mean age of 22.3 ± 4.6 months. Twenty-three of thirty-seven (62%) of PA patients underwent surgery. The development of FC in the PA group was independent of conservative versus surgical treatment (14 vs. 17%, p >0.05).

CONCLUSION

 Our study suggests that PA is associated with an increased risk of FC during the further course. Prophylactic stool softening in patients with PA may be considered to prevent subsequent FC.

The relationships between the results of contemporary tests of anorectal structure and sensorimotor function and the severity of fecal incontinence

BACKGROUND

Diagnostic investigations for fecal incontinence (FI) assess the structure and sensorimotor function of the anorectum. Investigations include anorectal manometry, anorectal sensory testing, pudendal nerve terminal motor latencies (PNTML), and endoanal sonography. The severity of FI and results of investigations are often discordant and the rate of symptom resolution following treatment remains <40%. High-resolution anorectal manometry (HRAM) and three-dimensional endoanal ultrasound (3D-US) have been introduced during the last decade. This study aims to assess the strength of relationships between contemporary investigation results and FI severity.

METHODS

Adults presenting for investigation of FI were assessed using the St Mark's FI severity score (SMIS), HRAM, anorectal sensory testing, PNTML, and 3D-US.

KEY RESULTS

246 patients were included. There were significant relationships between the SMIS and HRAM (resting pressure r_s = -0.23, 95% CI = (-0.34, -0.11), P < .001; squeeze pressure (r_s  = -0.26, 95% CI = (-0.37, -0.14), P < .001) and 3D-US (anterior EAS length r_s = -0.22, 95% CI = (-0.34, -0.09), P = .001). The relationships between SMIS and HRAM had a greater effect size in those with urge-predominant symptoms (resting pressure: r_s = -0.40, 95% CI = (-0.57, -0.20), P < .001, squeeze pressure: r_s = -0.34, 95% CI = (-0.52, -0.12), P = .003). Overall, the variance in SMIS accounted for by anorectal investigations was 8.6% (R² = 0.098, adjusted R² = 0.086, P < .001).

CONCLUSIONS AND INFERENCES

Anorectal investigations are not strong predictors of FI severity. These findings may reflect the multifactorial, heterogeneous pathophysiology of FI, the limitations of the SMIS and anorectal investigations, and contributing factors extrinsic to the anorectum.

Gastrointestinal Tolerance, Growth and Safety of a Partly Fermented Formula with Specific Prebiotics in Healthy Infants: A Double-Blind, Randomized, Controlled Trial

This study evaluated the effect of a partly fermented infant formula (using the bacterial strains Bifidobacterium breve C50 and Streptococcus thermophilus 065) with a specific prebiotic mixture (short-chain galacto-oligosaccharides (scGOS) and long-chain fructo-oligosaccharides (lcFOS; 9:1)) on the incidence of gastrointestinal symptoms, stool characteristics, sleeping and crying behaviour, growth adequacy and safety. Two-hundred infants ≤28 days of age were assigned either to experimental infant formula containing 30% fermented formula and 0.8 g/100 mL scGOS/lcFOS or to non-fermented control infant formula without scGOS/lcFOS. A group of breastfed infants served as a reference. No relevant differences in parent-reported gastrointestinal symptoms were observed. Stool consistency was softer in the experimental versus control group with values closer to the breastfed reference group. Daily weight gain was equivalent for both formula groups (0.5 SD margins) with growth outcomes close to breastfed infants. No clinically relevant differences in adverse events were observed, apart from a lower investigator-reported prevalence of infantile colic in the experimental versus control group (1.1% vs. 8.7%; p < 0.02). Both study formulae are well-tolerated, support an adequate infant growth and are safe for use in healthy term infants. Compared to the control formula, the partly fermented formula with prebiotics induces stool consistencies closer to breastfed infants.

Pediatricians lack knowledge for the diagnosis and management of functional constipation in children over 6 mo of age

AIM

To assess the knowledge of general pediatricians througout Indonesia about the diagnosis and treatment of childhood constipation.

METHODS

A comprehensive questionnaire was distributed to general pediatricians from several teaching hospitals and government hospitals all over Indonesia.

RESULTS

Data were obtained from 100 pediatricians, with a mean of 78.34 ± 18.00 mo clinical practice, from 20 cities throughout Indonesia. Suspicion of constipation in a child over 6 mo of age arises when the child presents with a decreased frequency of bowel movements (according to 87% of participants) with a mean of one bowel movement per 3.59 ± 1.0 d, hard stools (83%), blood in the stools (36%), fecal incontinence (33%), and/or difficulty in defecating (47%). Only 26 pediatricians prescribe pharmacologic treatment as first therapeutic approach, while the vast majority prefers nonpharmacologic treatment, mostly (according to 68%) The preferred nonpharmacologic treatment are high-fiber diet (96%), increased fluid intake (90%), toilet training (74%), and abdominal massage (49%). Duration of non-pharmacological treatment was limited to 1 to 2 wk. Seventy percent of the pediatricians recommending toilet training could only mention some elements of the technique, and only 15% was able to explain it fully and correctly. Lactulose is the most frequent pharmacologic intervention used (87% of the participants), and rectal treatment with sodium citrate, sodium lauryl sulfo acetate, and sorbitol is the most frequent rectal treatment (85%). Only 51% will prescribe rectal treatment for fecal impaction. The majority of the pediatricians (69%) expect a positive response during the first week with a mean (± SD) of 4.1 (± 2.56) d. Most participants (86%) treat during one month or even less. And the majority (67%) stops treatment when the frequency and/or consistency of the stools have become normal, or if the patient had no longer complaints.

CONCLUSION

These data provide an insight on the diagnosis and management of constipation in childhood in Indonesia. Although general pediatricians are aware of some important aspects of the diagnosis and mangement of constipation, overall knowledge is limited. Efforts should be made to improve the distribution of existing guidelines. These findings highlight and confirm the difficulties in spreading existing information from guidelines to general pediatricians.

Attention Deficit Hyperactivity Disorder and Functional Defecation Disorders in Children

OBJECTIVES

The aim of the study was to assess the prevalence of attention deficit hyperactivity disorder (ADHD) in children presenting with functional defecation disorders (FDDs) and to assess the prevalence of FDDs in children with ADHD.

METHODS

A cross-sectional cohort study was carried out between September 2014 and May 2016. Group 1: Parents of children with FDDs according to the Rome III criteria completed the Child Behavior Checklist and the VvGK (Dutch questionnaire based on the American Disruptive Behavior Disorder rating scale). Patients with ADHD subarea scores ≥70 on the Child Behavior Checklist and/or ≥16 on the VvGK were referred for further psychiatric evaluation. Group 2: Parents of children treated for ADHD at a specialized ADHD outpatient clinic completed a standardized questionnaire regarding their child's defecation pattern.

RESULTS

In group 1 (282 children with FDDs), 10.3% (7.1%-13.5% bias-corrected and accelerate confidence interval) were diagnosed with ADHD. Group 2 consisted of 198 children with ADHD, 22.7% (17.6-28.8 bias-corrected and accelerate confidence interval) fulfilled the Rome III criteria for an FDD. Children with both an FDD and ADHD reported urinary incontinence significantly more often compared to children with an FDD or ADHD alone: 57.1% in FDD + ADHD versus 22.8% in FDD alone (P < 0.001) and 31.1% in ADHD + FDD versus 7.8% in ADHD alone (P < 0.001).

CONCLUSIONS

Approximately 10.3% of children with FDDs had ADHD and 22.7% of children with a known diagnosis of ADHD fulfilled the Rome III criteria for an FDD. This observation suggests that screening for behavioral disorders and FDDs should be incorporated into the diagnostic workup of these groups of children.

Encopresis in Children: An Overview of Recent Findings

The term ‘encopresis’, derived from ancient Greek ἐγκόπρησις / egkóprēsis, which means stool, was first introduced in 1926 by Weissenberg to describe the loss of stool in underwear as the faecal equivalent of enuresis. The soiling of underwear is defined as the accidental passage of very small amounts of faeces into underpants. Quantitatively, the content of stool between encopresis and soiling is difficult to determine, and it is especially difficult for parents assess it. Therefore, a new term was adopted – faecal incontinence – that encompasses both encopresis and soiling.

Faecal incontinence is defined as the discharge of faeces in socially awkward situations at least once per month in children ≥ 4 years old. In approximately 95% of cases, faecal incontinence in children is not organic in origin, but instead appears as a functional gastrointestinal disorder. In 80% of children with functional faecal incontinence, the symptoms are associated with functional constipation. The remaining 20% of the cases involve no signs of faecal retention and are defined as non-retentive functional faecal incontinence.

This paper aims to present the latest findings within this area of paediatric gastroenterology.

Epidemiology of functional gastrointestinal disorders in infants and toddlers: A systematic review

AIM

To assess the functional gastrointestinal disorders (FGID) prevalence in infants and toddlers.

METHODS

PubMed, EMBASE, and Scopus were searched for original articles from inception to February 2016. The literature search was made in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). For inclusion, each study had to report epidemiological data of FGID on children up to 4 years old and contain standardized outcome Rome II or III criteria. The overall quality of included epidemiological studies was evaluated in accordance to Loney's proposal for prevalence studies of health literature. Two reviewers assessed each study for inclusion and extracted data. Discrepancies were reconciled through discussion.

RESULTS

It was identified a total of 101 articles through the databases and two through the manual search. A total of 28 articles fulfilled the eligibility criteria. After reading the full articles, 13 of them were included in the present review. Twelve studies were written in English and one in Chinese, and published between 2004 and 2015. Eight articles (61.5%) were performed in Europe, three (23.1%) in America and two (15.4%) in Asia. Sample size varied between 45 and 9660 subjects. Cross-sectional frequency was reported in majority of studies (k = 9) and four studies prospectively followed the subjects. 27.1% to 38% of participants have met any of Rome's criteria for gastrointestinal syndromes, of those 20.8% presented two or more FGID. Infant regurgitation and functional constipation were the most common FGID, ranging from less than 1% to 25.9% and less than 1% to 31%, respectively. Most included studies were of moderate to poor data quality with respect to absence of confidential interval for prevalence rate and inadequate sampling methods.

CONCLUSION

The scarcity and heterogeneity of FGID data call for the necessity of well-designed epidemiological research in different levels of pediatric practice and refinement of diagnostic.

Constipation prophylaxis in children undergoing orthopedic surgery: A quasi-experimental study

PURPOSE

This study evaluated the effectiveness of constipation prophylaxis administered with the support of an advanced practice nurse.

DESIGN

A quasi-experimental study with a historical control group of 112 pediatric (age 1-18) orthopedic patients and an intervention group of 59 patients was conducted in a surgical ward in Switzerland.

RESULTS

The implementation of a standardized constipation prophylaxis led to an absolute risk reduction (27%) of constipation. Fisher's exact test showed a significant difference in the prevalence of constipation in the two samples, p = .001.

PRACTICE IMPLICATIONS

Constipation prophylaxis is a necessity in pediatric orthopedics.

Age of Onset of Functional Constipation

In a review of 538 children with functional constipation, we analyzed ages of presentation and onset, symptom duration, and behavioral/developmental problems. We divided the subjects into quartiles (Q1-Q4) based on age of onset. Median onset age was 2.3 years. The oldest group had the shortest symptom duration before referral at 1.8 ± 1.8 years (compared with Q3 to Q1, P = 0.039, P = 0.001, P < 0.001, respectively). Of the Q4 subjects, 22% had a behavioral/developmental problem (P < 0.001 compared with Q1-Q3). We conclude that most children develop functional constipation as infants and toddlers, but those with later onset are more likely to have behavioral/developmental issues and see a specialist sooner.

Identifying faecal impaction is important for ensuring the timely diagnosis of childhood functional constipation

AIM

Most research on functional constipation has been carried out at a tertiary level. We focused this study on a secondary-level hospital outpatients' department, assessing the distribution of diagnostic criteria for childhood functional constipation and evaluating the consequences of current diagnostic practice based on current guidelines.

METHODS

We enrolled 235 children, aged two to 16 years of age, with functional constipation according to the Rome III criteria and assessed them using medical histories and physical examinations, including rectal examinations and ultrasound measurements of rectal diameter. Faecal impaction was a rectal diameter exceeding 3 cm.

RESULTS

The most frequently reported symptom was painful bowel movements (72.3%) and 39.1% had faecal incontinence. Rectal examination identified faecal impaction in 149 children (66.2%), and ultrasound showed a mean rectal diameter of 3.4 ± 0.6 cm, compared to 2.2 ± 0.6 cm in children without impaction (p < 0.001). Of the 149 children with faecal impaction, 19 (12.8%) only had one additional Rome III criterion. The rectal diameter exceeded 3 cm in 79.9% of cases.

CONCLUSION

Identifying faecal impaction is important for ensuring the timely diagnosis of childhood functional constipation at the secondary care level. Ultrasound examination proved a reliable alternative to rectal examination or abdominal radiography when identifying faecal impaction.

Fecal impaction

Fecal impaction (FI) is a common and potentially serious medical condition that occurs in all age groups. Children, incapacitated patients, and the institutionalized elderly are considered the highest at-risk populations. FI usually occurs in the setting of chronic or severe constipation, anatomic anorectal abnormalities, and neurogenic or functional gastrointestinal disorders. Generally, FI is a preventable disorder, and early recognition is important, as it is associated with increased morbidity, mortality, and high health care costs. Evaluation with a careful history and physical examination, in conjunction with radiologic imaging, such as an acute abdominal series or computed tomography (CT), is imperative. Prompt identification and treatment minimize the risk of complications attributable to FI, which may include bowel obstruction leading to stercoral ulcer, perforation, peritonitis, or cardiopulmonary collapse with hemodynamic instability. Treatment options include manual fragmentation and extraction of the fecal mass, distal colonic cleansing using enemas and rectal lavage with the aid of a sigmoidoscope, and/or using water-soluble contrast media such as Gastrografin to both identify the extent of the impaction and aid in cleansing and removal. Surgical resection of the involved colon or rectum is reserved for peritonitis resulting from bowel perforation. Since recurrence is common, implementing preventive measures such as increasing daily water and fiber intake, limiting medications that decrease colonic motility, using secretagogues or prokinetic agents, and treating underlying anatomic defects are highly important.

ACG clinical guideline: management of benign anorectal disorders

These guidelines summarize the definitions, diagnostic criteria, differential diagnoses, and treatments of a group of benign disorders of anorectal function and/or structure. Disorders of function include defecation disorders, fecal incontinence, and proctalgia syndromes, whereas disorders of structure include anal fissure and hemorrhoids. Each section reviews the definitions, epidemiology and/or pathophysiology, diagnostic assessment, and treatment recommendations of each entity. These recommendations reflect a comprehensive search of all relevant topics of pertinent English language articles in PubMed, Ovid Medline, and the National Library of Medicine from 1966 to 2013 using appropriate terms for each subject. Recommendations for anal fissure and hemorrhoids lean heavily on adaptation from the American Society of Colon and Rectal Surgeons Practice Parameters from the most recent published guidelines in 2010 and 2011 and supplemented with subsequent publications through 2013. We used systematic reviews and meta-analyses when available, and this was supplemented by review of published clinical trials.

Use of Rome II versus Rome III criteria for diagnosis of functional constipation in young children

BACKGROUND

There has been no study to evaluate the use of the Rome III criteria for diagnosis of constipation in the unselected young pediatric population. The aim of this study was to evaluate and compare the use of the Rome II and Rome III criteria for diagnosis of constipation in a group of unselected young Thai children.

METHODS

This cross-sectional study was conducted in 3010 healthy children aged 4 months-5 years who attended a well-baby clinic. Data concerning bowel habits and behavioral components of defecation of the children were obtained by interviewing the parents. Presence of a large fecal mass in the rectum of children with possible constipation was evaluated by abdominal palpation.

RESULTS

Seventy-one children (2.4%) were found to have constipation, based on at least one of the two sets of criteria, at the time of interview. The prevalence of constipation as defined according to the Rome II and Rome III criteria for functional constipation (FC) was 1.9% and 1.6%, respectively. The majority of constipated children (47.9%) met the diagnostic criteria of both the Rome II and Rome III for FC, followed by the Rome II criteria for FC alone (32.4%) and the Rome III criteria for FC alone (18.3%). Twenty-one children (0.7%) whose parents reported defecation difficulties did not fulfill any diagnostic criteria for constipation.

CONCLUSIONS

The prevalence of FC in young Thai children is low. For unselected young children, the Rome II criteria for FC are still appropriate for diagnosis of FC.

Bladder and bowel dysfunction: evidence for multidisciplinary care

PURPOSE

We examined the symptoms of bladder-bowel dysfunction (ie severity of voiding dysfunction and stool consistency) and psychosocial difficulties in children presenting to the pediatric urology clinic for voiding dysfunction and to the pediatric gastroenterology clinic for functional constipation.

MATERIALS AND METHODS

Parents of children seen at the gastroenterology clinic were recruited during the outpatient clinic appointment, and parents of children seen at the urology clinic were randomly selected from the research database and matched to the gastroenterology sample based on age and gender of the child. All parents completed the Dysfunctional Voiding Scoring System, Bristol Stool Form Scale, Pediatric Symptom Checklist and Parenting Stress Index™-Short Form, which assessed severity of voiding dysfunction, stool consistency, level of psychosocial difficulties and level of parenting stress, respectively.

RESULTS

Children seen at the urology and gastroenterology clinics did not differ significantly on any of the measures, indicating that the severity of their bladder-bowel dysfunction is similar. However, they had significantly more severe voiding dysfunction, more constipated stool and more psychosocial difficulties than historical healthy controls. Additionally, level of parenting stress was significantly correlated with patient level of psychosocial difficulties and severity of voiding dysfunction.

CONCLUSIONS

Patients with bladder and bowel dysfunction represent a homogeneous group that would potentially benefit from a multidisciplinary treatment approach involving urology, gastroenterology and psychology professionals.

Functional defecation disorders in children: comparing the Rome II with the Rome III criteria

OBJECTIVES

To evaluate the prevalence of pediatric functional defecation disorders (FDD) using the Rome III criteria and to compare these data with those obtained using Rome II criteria.

STUDY DESIGN

A chart review was performed in patients referred to a tertiary outpatient clinic with symptoms of constipation and/or fecal incontinence. All patients received a standardized bowel questionnaire and physical examination, including rectal examination. The prevalence of pediatric FDD according to both Rome criteria sets was assessed.

RESULTS

Patients with FDD (n = 336; 61% boys, mean age 6.3 ± 3.5 SD) were studied: 39% had a defecation frequency ≤ 2/wk, 75% had fecal incontinence, 75% displayed retentive posturing, 60% had pain during defecation, 49% passed large diameter stools, and 49% had a palpable rectal fecal mass. According to the Rome III criteria, 87% had functional constipation (FC) compared with only 34% fulfilling criteria for either FC or functional fecal retention based on the Rome II definitions (P < .001). Of the patients with a rectal fecal mass, 95% would also have been correctly identified as having FC without a rectal examination. Twenty-nine patients (11%) fulfilled the criteria for functional nonretentive fecal incontinence according to both the Rome II and Rome III criteria.

CONCLUSION

The pediatric Rome III criteria for FC are less restrictive than the Rome II criteria. The Rome III criteria are an important step forward in the definition and recognition of FDD in children.

Characteristics of intestinal habits in children younger than 4 years: detecting constipation

OBJECTIVES

The aim of the present study was to describe the prevalence of childhood constipation, stool characteristics, and their relationship with toilet training and age of introduction of cow's milk.

METHODS

A total of 4231 children born in 2004, from a birth cohort study, were assessed at 12, 24, and 48 months of age, when their mothers provided information on sociodemographic characteristics, bowel habits, toilet training, and age of introduction of cow's milk and other foods.

RESULTS

The prevalence of constipation was 27.3% and 31.0% at 24 and 48 months of age, respectively. Among girls, at 48 months of age, it was 34.4% versus 27.4% in boys (P<0.001). The most common features of constipation were scybalous stools (47.7% and 41.0% at 24 and 48 months, respectively), evacuation difficulty (24.3% and 23.1%), and hard stools (17.8% and 34.1%). Toilet training starting before 24 months was associated with constipation at 24 months and its persistence up to 48 months. Among children who did not receive cow's milk in their first year of life, 22% had constipation at 24 months, 22.6% at 48 months, and 8.3% at 24 and 48 months. Among children who started cow's milk before 30 days of life, the respective proportions of children with constipation was 28.2%, 33%, and 12.4%.

CONCLUSIONS

The prevalence of constipation increases with age and cannot be detected using only information on evacuation interval. Toilet training before 24 months and introduction of cow's milk before 1 year of age is positively associated with constipation at 24 months and its persistence up to 48 months.

Value of abdominal radiography, colonic transit time, and rectal ultrasound scanning in the diagnosis of idiopathic constipation in children: a systematic review

OBJECTIVE

To perform a systematic review evaluating the value of abdominal radiography, colonic transit time (CTT), and rectal ultrasound scanning in the diagnosis of idiopathic constipation in children.

STUDY DESIGN

Eligible studies were those assessing diagnostic accuracy of abdominal radiography, CTT, or rectal ultrasound scanning in children suspected for idiopathic constipation. Methodological quality of the included studies was assessed with the Quality Assessment of studies of Diagnostic Accuracy included in Systematic reviews checklist.

RESULTS

One systematic review summarized 6 studies on abdominal radiography until 2004. The additional 9 studies evaluated abdominal radiography (n = 2), CTT (n = 3), and ultrasound scanning (n = 4). All studies except two used a case-control study design, which will lead to overestimation of test accuracy. Furthermore, none of the studies interpreted the results of the abdominal radiography, ultrasound scanning, or CTT without knowledge of the clinical diagnosis of constipation. The sensitivity of abdominal radiography, as studied in 6 studies, ranged from 80% (95% CI, 65-90) to 60% (95% CI, 46-72), and its specificity ranged from 99% (95% CI, 95-100) to 43% (95% CI, 18-71). Only one study presented test characteristics of CTT, and two studies presented test characteristics of ultrasonography.

CONCLUSION

We found insufficient evidence for a diagnostic association between clinical symptoms of constipation and fecal loading on abdominal radiographs, CTT, and rectal diameter on ultrasound scanning in children.

Constipation in childhood

Constipation in children is an often long-lasting pediatric functional gastrointestinal disorder with a worldwide prevalence varying between 0.7% and 29.6%, and estimated health-care costs of US$3.9 billion per year in the USA alone. The pathophysiology of childhood constipation is multifactorial and remains incompletely understood; however, withholding of stools, starting after an experience of a hard, painful, or frightening bowel movement is the most common cause found in children. A thorough medical history and physical examination, including a rectal examination in combination with a bowel diary, is sufficient in the majority of cases to diagnose constipation. The current standard treatment consists of education, toilet training, disimpaction, maintenance therapy and long-term follow-up. In the past decade, well-designed treatment trials in the pediatric population have emerged and long-term outcome studies have been completed. This Review summarizes the current knowledge of the clinical aspects of childhood constipation, including pathogenesis, diagnosis and treatment, with particular emphasis on the latest available data.

Bowel habits and toilet training in rural and urban dwelling children in a developing country

OBJECTIVES

To determine the bowel habits and toilet training of developmentally normal children ages 5 to 8 years in rural and urban areas of the province of Sindh, Pakistan.

STUDY DESIGN

We conducted a descriptive cross-sectional study, conducted at households of rural (District Khairpur) and urban (Karachi) areas of Sindh, Pakistan, which enrolled 1000 children between 5 and 8 years of age, (half from rural and half from urban areas). A questionnaire regarding age, ethnicity, and sex was completed by two separate investigators from each setting. Recall information was elicited about bowel habits for the previous 2 weeks and the frequency and quality of stools, size of stools, and dietary habit for the previous 24 hours. A constipation score that was based on modified Rome III criteria was developed for each child.

RESULTS

Functional constipation was reported 1.6 times more in the rural than the urban population (P < .001). Toilet training was initiated and completed earlier in the urban (18.6 ± 6.8 and 46 ± 12.5 months) than the rural children (28.6 ± 6.1 and 56.5 ± 6.7 months) (P < .001). The daily calorie, macronutrient, fiber, and water intake was higher in the urban population (P < .001). Functional constipation was significantly (P = .016) negatively correlated (r = -0.076) with the fiber intake.

CONCLUSIONS

Functional constipation was found more frequently in the rural area. Toilet training was initiated and completed significantly earlier in the urban population.

Coexistence of constipation and incontinence in children and adults

The coexistence of constipation and fecal incontinence has long been recognised in paediatric and geriatric populations, but is grossly underappreciated in the rest of the adult population. In children, functional fecal incontinence is usually associated with constipation, stool retention and incomplete evacuation, and is frequently allied to urinary incontinence. Pathophysiology of the incontinence is incompletely understood, although both in children and adults, it is thought to be secondary to overflow, while in adults it may also be related to pelvic floor dysfunction and denervation. Incontinence has an important impact on quality of life and daily functioning, and in children may be associated with behaviour problems. The treatment of underlying constipation usually results in improvement in incontinence. This review broadly addresses the epidemiology and pathophysiology of coexistent constipation and incontinence in both children and adults, and also reviews clinical presentation and treatment response in pediatrics.

Prevalence of functional gastrointestinal diseases in a cohort of Sri Lankan adolescents: comparison between Rome II and Rome III criteria

Little is known about the prevalence of functional gastrointestinal diseases (FGDs) in adolescents, especially in developing countries. This cross-sectional survey conducted in a semi-urban school in Sri Lanka, assessed the prevalence of whole spectrum of FGDs in 427 adolescents (age 12-16 years) using a validated self-administered questionnaire. According to Rome III criteria, 123 (28.8%) adolescents had FGDs. Of them, 59 (13.8%) had abdominal-pain-related FGDs [irritable bowel syndrome (IBS) 30, functional dyspepsia 15, functional abdominal pain 13 and abdominal migraine 1]. Prevalence of functional constipation, aerophagia, adolescent rumination syndrome, cyclical vomiting syndrome and non-retentive faecal incontinence were 4.2, 6.3, 4, 0.5 and 0.2%, respectively. Only 58 (13.6%) adolescents were found to have FGDs when Rome II criteria were used. In conclusion, FGDs were present in more than one-fourth of adolescents in the study group, of which IBS was the most common. Rome III criteria were able to diagnose FGDs more comprehensively than Rome II.

Constipation in children: novel insight into epidemiology, pathophysiology and management

Constipation in children is a common health problem affecting 0.7% to 29.6% children across the world. Exact etiology for developing symptoms is not clear in children and the majority is considered to have functional constipation. Alteration of rectal and pelvic floor function through the brain-gut axis seems to play a crucial role in the etiology. The diagnosis is often a symptom-based clinical process. Recently developed Rome III diagnostic criteria looks promising, both in clinical and research fields. Laboratory investigations such as barium enema, colonoscopy, anorectal manometry and colonic transit studies are rarely indicated except in those who do not respond to standard management. Treatment of childhood constipation involves several facets including education and demystification, toilet training, rational use of laxatives for disimpaction and maintenance and regular follow-up. Surgical options should be considered only when medical therapy fails in long standing constipation. Since most of the management strategies of childhood constipation are not evidence-based, high-quality randomized controlled trials are required to assess the efficacy of currently available or newly emerging therapeutic options. Contrary to the common belief that children outgrow constipation as they grow up, a sizable percentage continue to have symptoms beyond puberty.

Clinical utility of Rome criteria managing functional gastrointestinal disorders in pediatric primary care

OBJECTIVE

Our goals were to demonstrate that functional gastrointestinal disorders (FGIDs) can be diagnosed in a positive fashion and managed by family pediatricians (FPs); to assess the compliance of FPs with a predefined diagnostic/therapeutic protocol for managing FGIDs to evaluate efficacy of continuing medical education; and to evaluate the success of reassurance by using a biopsychosocial model in comparison to drug treatment in an open-label, nonrandomized study.

PATIENTS AND METHODS

A total of 9291 patients, aged birth to 14 years, were prospectively enrolled during a 3-month period by 21 FPs. Follow-up was performed at 1-, 3-, and 12-month intervals. To assess compliance, after diagnosis, FPs that participated in the study were asked to comply with the diagnostic/therapeutic protocol and record investigations and treatment prescribed.

RESULTS

Two hundred sixty-one patients (2.8%) met Rome II criteria and were included in the study. In all cases but 4, diagnosis of FGIDs was confirmed at the end of follow-up (98.4%). Average compliance of FPs was >80%. Among 56 patients treated only with the explanation of symptom and reassurance, 52 (92.8%) have reported success, in comparison with 26 of 35 patients (74.3%) treated with drugs (odds ratio: 4.5 [95% confidence interval: 1.3-16]).

CONCLUSIONS

FGIDs can be diagnosed and managed in primary care. Prospective studies in primary care allow assessment of compliance of pediatricians and implementation of what is learned in courses developed in continuing medical education. Informed reassurance and availability of FPs are more useful than over-the-counter drugs, which are often used for FGIDs.

Bowel habits and toilet training in a diverse population of children

OBJECTIVES

To gather data concerning bowel habits and toilet training of developmentally normal children ages 5 to 8 years.

METHODS

A questionnaire containing information on age, race, and sex was completed anonymously by a parent in 9 pediatric practices. Recall information was elicited about onset and completion of toilet training, frequency and quality of stooling, size of bowel movements, and behavioral components of defecation.

RESULTS

Questionnaires were completed for 1142 children. When all of the children were considered together, toilet training started at a mean of 27.2 months and was completed at a mean of 32.5 months. It began and was completed nearly 3 months earlier for girls than for boys (P<0.001). African American children started and completed toilet training at least 6 months earlier than white children (P<0.001). Of the children, 95% defecated either daily or every other day. Straining at defecation and infrequent stooling were reported significantly more often for girls, whereas staining of underclothes and passage of large bowel movements were reported more often in boys. Approximately 10% of children fulfilled criteria for functional constipation.

CONCLUSIONS

Most of the children between 5 and 8 years of age have a medium-size bowel movement daily or every other day without straining or withholding. Although African American children toilet train at an earlier age than do white children, bowel habits appear to be similar. A sizeable subgroup of children presenting to primary care providers have a history that is consistent with constipation.

Altered bile acid metabolism in childhood functional constipation: inactivation of secretory bile acids by sulfation in a subset of patients

OBJECTIVE

An elevated concentration in the colon of the primary bile acid chenodeoxycholic acid (CDCA) or the secondary bile acid deoxycholic acid (DCA) is known to induce water secretion, causing diarrhea. We hypothesized that of the many fecal bile acids, only CDCA and DCA function as endogenous laxatives; therefore, a decrease in their proportion may be a cause of childhood functional constipation. To test this possibility, fecal bile acid composition was determined in children with functional constipation and in nonconstipated control children.

PATIENTS AND METHODS

Fecal samples were obtained from 207 children, 103 with functional constipation and 104 with normal bowel habits. Bile acid classes were determined by use of electrospray ionization-single ion monitoring-mass spectrometry (ESI-SIM-MS), and individual bile acids were measured by gas chromatography (GC)-MS (GC-MS). The structure of individual sulfated bile acids was obtained by use of liquid chromatography (LC)-MS (LC-MS).

RESULTS

By ESI-SIM-MS, the proportions of DCA did not differ in constipated children (n = 73) from that in control children (n = 92), but monosulfated dihydroxy bile acids were greater (P < 0.05). The difference was attributable to 6 patients in the constipated group whose major fecal bile acid by LC-MS was the 3-sulfate of CDCA. Sulfation of CDCA is known to abolish its secretory activity. By GC-MS, the bile acid profile was identical in the 2 groups.

CONCLUSIONS

In most children with functional constipation, the fecal bile acid profile seems to be normal. There is a small subset of children, however, whose dominant fecal bile acid is the 3-sulfate of CDCA, indicating a novel disturbance in bile acid metabolism. Such sulfation abolishes the secretory activity of CDCA and may contribute to constipation.

Pediatric anorectal disorders

This article reports the clinical, physiopathologic, diagnostic, and therapeutic aspects of the most common anorectal disorders in children. In particular, it focuses on the differential diagnosis between organic and functional constipation. In addition, the authors separately examine some of the clinical conditions such as atopy, neurologic diseases, and anorectal malformations, in which chronic constipation may be an important clinical manifestation.

Constipation as cause of acute abdominal pain in children

OBJECTIVE

To evaluate the causes of acute abdominal pain in a large academic pediatric primary care population.

STUDY DESIGN

The complete charts of 962 children, > or = 4 years old, who were seen for at least 1 health maintenance visit during a 6-month period, were reviewed retrospectively for complaints and cause of acute abdominal pain.

RESULTS

We found that 9% of the 962 children had a visit for acute abdominal pain, with significantly more girls (12%) than boys (5%) having this complaint. Acute and chronic constipation were the most frequent causes of acute abdominal pain, occurring in 48% of subjects. A surgical cause was present in 2% of subjects. The cause for the acute abdominal pain remained unknown in 19% of subjects. We did not find significant differences in diagnoses in the primary care clinics versus emergency department.

CONCLUSIONS

We found that constipation was the most common cause of acute abdominal pain in children.

Functional defecation disorders in children: PACCT criteria versus Rome II criteria

OBJECTIVES

To evaluate the clinical validity and applicability of the Paris Consensus on Childhood Constipation Terminology (PACCT) versus the Rome II criteria for pediatric functional defecation disorders (FDDs).

STUDY DESIGN

Children from infancy to 17 years who had been referred to a tertiary center for chronic constipation were recruited for the study. A prospective longitudinal design was used. The Questionnaire on Pediatric Gastrointestinal Symptoms (QPGS) for parents of children age 0 to 4 and 4 to 17 years and for children age 10 to 17 years was used for diagnosis of FDDs.

RESULTS

Children (n = 128; mean age, 67.2 months; 62 males) were screened consecutively. FDDs were diagnosed significantly more often by PACCT than by the Rome II criteria (112 [88.9%] vs 60 [47.6%]; P = .001). The agreement Cohen's kappa test showed kappa = .173. A statistically significant difference was reported between Rome II and PACCT in the 4- to 17-year-old group (P = .001). Scybalous, pebble-like stools and defecation with straining were the main symptoms reported (80%), followed by painful defecation (66%).

CONCLUSIONS

The PACCT criteria show greater applicability than the Rome II criteria for FDDs. The poor agreement implies that they do not identify the same types of patients. Because such a high percentage of constipated children reported the symptoms of defecation with straining, scybalous pebble-like stools, and painful defecation, including these symptoms in any revised criteria should be taken into consideration.

Chronic childhood constipation: a review of the literature and the introduction of a protocolized behavioral intervention program

OBJECTIVE

To release a newly protocolized behavioral intervention program for children with chronic constipation aged 4-18 years with guidance from literature about underlying theories from which the treatment techniques follow.

METHODS

Articles until July 2006 were identified through electronic searches in Medline, PsychInfo and Picarta. There was no limit placed on the time periods searched. Following keywords were used: constipation, encopresis, fecal incontinence, psychotherapy, emotions, randomized controlled trials, parent-child relations, parents, family, psychology, behavioral, behavioral problems, psychopathology, toilet, social, psychosocial, pain, retentive posturing, stool withholding, stool toileting refusal, shame, stress, anxiety. A filter was used to select literature referring to children 0-18 years old. Key constructs and content of sessions for a protocolized behavioral intervention program are derived from literature.

RESULTS

Seventy-one articles on chronic childhood constipation are critically reviewed and categorized into sections on epidemiology, symptomatology, etiology and consequences, treatment and effectivity, and follow-up on chronic childhood constipation. This is followed by an extensive description of our protocolized behavioral intervention program.

CONCLUSION

This is the first article on childhood constipation presenting a full and transparent description of a behavioral intervention program embedded in literature. In addition, a theoretical framework is provided that can serve as a trial paradigm to evaluate intervention effectiveness.

PRACTICE IMPLICATIONS

This article can serve as an extensive guideline in routine practice to treat chronically constipated children. By releasing our protocolized behavioral intervention program and by offering a theoretical framework we expect to provide a good opportunity to evaluate clinical effectivity by both randomized controlled trials and qualitative research methods. Findings will contribute to the implementation of an effective treatment for chronic constipation in childhood.

Prevalence rates for constipation and faecal and urinary incontinence

OBJECTIVE

To evaluate the prevalence rates for constipation and faecal and urinary incontinence in children attending primary care clinics in the United States.

METHODS

Retrospective review of case records of all children, 4-17 years of age, seen for at least one health maintenance visit during a 6 month period and followed from birth or within the first 6 months of age in our clinics. We reviewed all charts for constipation, faecal incontinence and urinary incontinence.

RESULTS

We included 482 children in the study, after excluding 39 children with chronic diseases. The prevalence rate for constipation was 22.6% and was similar in boys and girls. The constipation was functional in 18% and acute in 4.6%. The prevalence rate for faecal incontinence (> or =1/week) was 4.4%. The faecal incontinence was associated with constipation in 95% of our children. The prevalence rate for urinary incontinence was 10.5%; 3.3% for daytime only, 1.8% for daytime with night-time and 5.4% for night-time urinary incontinence. Faecal and urinary incontinence were significantly more commonly observed in children with constipation than in children without constipation.

CONCLUSION

The prevalence rates were 22.6% for constipation, 4.4% for faecal incontinence and 10.5% for urinary incontinence in a US primary care clinic. Children with constipation had higher prevalence rates for faecal and urinary incontinence than children without constipation. Boys with constipation had higher rates of faecal incontinence than girls with constipation.

Darmentleerung, Sauberkeitsentwicklung bei Kindern und ihre Störungen (Obstipation und Enkopresis)

Zusammenfassung. Verstopfung und Stuhlinkontinenz bei Kindern stellen für die Betroffenen und deren Familien eine schwere Belastung dar. In den meisten Fällen liegen funktionelle Störungen ohne organische Erkrankungen zugrunde. Trotzdem muss bei jedem Kind eine zielgerichtete somatische Diagnostik erfolgen. Rein psychische Ursachen für Obstipation und Inkontinenz sind eher selten. Nach Eingrenzen der Diagnose kann durch verschiedene Therapieansätze eine Besserung der Symptomatik erfolgen. Neben medikamentösen und diätetischen Maßnahmen stehen verhaltenstherapeutische Ansätze im Vordergrund. Der vorliegende Text gibt einen Überblick über den aktuellen Stand der wissenschaftlichen Erkenntnisse zu Kontinenzentwicklung, Physiologie und Pathophysiologie der Darmentleerung sowie Diagnostik und Behandlung von Obstipation und Enkopresis aus pädiatrisch-gastroenterologischer Sicht.

Functional nonretentive fecal incontinence in children

Fecal incontinence, the loss of feces in the underwear after age 4 years, is a frustrating phenomenon for children and their parents. It is difficult to treat, presenting as a single symptom without any organic cause or signs of constipation. This review addresses the definition of functional nonretentive fecal incontinence and provides an overview of its epidemiology, pathophysiology, clinical features, diagnostic work-up and prognosis.

A randomized, prospective, comparison study of polyethylene glycol 3350 without electrolytes and milk of magnesia for children with constipation and fecal incontinence

OBJECTIVE

Our aim was to compare 2 laxatives, namely, polyethylene glycol 3350 without electrolytes and milk of magnesia, evaluating the efficacy, safety, acceptance, and 1-year outcomes.

METHODS

Seventy-nine children with chronic constipation and fecal incontinence were assigned randomly to receive polyethylene glycol or milk of magnesia and were treated for 12 months in tertiary care pediatric clinics. Children were counted as improved or recovered depending on resolution of constipation, fecal incontinence, and abdominal pain after 1, 3, 6, and 12 months. An intent-to-treat analysis was used. Safety was assessed with evaluation of clinical adverse effects and blood tests.

RESULTS

Thirty-nine children were assigned randomly to receive polyethylene glycol and 40 to receive milk of magnesia. At each follow-up visit, significant improvement was seen in both groups, with significant increases in the frequency of bowel movements, decreases in the frequency of incontinence episodes, and resolution of abdominal pain. Compliance rates were 95% for polyethylene glycol and 65% for milk of magnesia. After 12 months, 62% of polyethylene glycol-treated children and 43% of milk of magnesia-treated children exhibited improvement, and 33% of polyethylene glycol-treated children and 23% of milk of magnesia-treated children had recovered. Polyethylene glycol and milk of magnesia did not cause clinically significant side effects or blood abnormalities, except that 1 child was allergic to polyethylene glycol.

CONCLUSIONS

In this randomized study, polyethylene glycol and milk of magnesia were equally effective in the long-term treatment of children with constipation and fecal incontinence. Polyethylene glycol was safe for the long-term treatment of these children and was better accepted by the children than milk of magnesia.

Childhood functional gastrointestinal disorders: child/adolescent

The Rome II pediatric criteria for functional gastrointestinal disorders (FGIDs) were defined in 1999 to be used as diagnostic tools and to advance empirical research. In this document, the Rome III Committee aimed to update and revise the pediatric criteria. The decision-making process to define Rome III criteria for children aged 4-18 years consisted of arriving at a consensus based on clinical experience and review of the literature. Whenever possible, changes in the criteria were evidence based. Otherwise, clinical experience was used when deemed necessary. Few publications addressing Rome II criteria were available to guide the committee. The clinical entities addressed include (1) cyclic vomiting syndrome, rumination, and aerophagia; 2) abdominal pain-related FGIDs including functional dyspepsia, irritable bowel syndrome, abdominal migraine, and functional abdominal pain; and (3) functional constipation and non-retentive fecal incontinence. Adolescent rumination and functional constipation are newly defined for this age group, and the previously designated functional fecal retention is now included in functional constipation. Other notable changes from Rome II to Rome III criteria include the decrease from 3 to 2 months in required symptom duration for noncyclic disorders and the modification of the criteria for functional abdominal pain. The Rome III child and adolescent criteria represent an evolution from Rome II and should prove useful for both clinicians and researchers dealing with childhood FGIDs. The future availability of additional evidence-based data will likely continue to modify pediatric criteria for FGIDs.

Estreñimiento funcional: estudio prospectivo y respuesta al tratamiento

OBJECTIVE

To assess the prevalence of functional constipation (FC) with and without encopresis, the factors involved in its onset, and treatment response.

PATIENTS AND METHODS

A prospective study of 62 children was performed using a standard questionnaire (onset-age, regular toilet use, encopresis, complications, dietary habits and environmental and psychological factors) and physical and anthropometric assessment. FC was defined as a stool frequency of less than 3 bowel movements/week, with passage of large or scybalous stools, with or without 2 or more soiling episodes per week, without underlying disease. Treatment included demystification, behavioral modification and drugs (mineral oil and senna). Each child was periodically re-evaluated, and treatment was considered successful when the defecation rate was 3 or more bowel movements/week, discomfort was absent, and fecal soiling frequency was 2 or fewer episodes/ month.

RESULTS AND CONCLUSIONS

FC accounted for 13 % of all first consultations (60 % boys, 40 % girls; mean age at diagnosis 6.1 years). The most frequent manifestations were painful defecation (60 %), rectorrhagia (42 %), obstructive episodes (34 %) and anal fissure or hemorrhoids (17 %); 19 patients (31 %) had encopresis. Nutritional assessment revealed that 84 % of the patients was well nourished and 16 % was overweight. Fiber intake was deficient in more than 60 %. Sixteen (26 %) patients underwent successful relief of impaction with senna (20-30 mg/dose) combined with mineral oil. Maintenance treatment included mineral oil (15-30 ml/day) and senna at the minimum effective dose (5-15 mg/day). Satisfactory results were achieved 1 month later in 32 % of the children, 3-6 months later in 71 %, and 6-12 months later in 85 %; successful response was closely related to regular toilet habits, dietary modification and a shift in the family's attitude.

Development and preliminary validation of the questionnaire on pediatric gastrointestinal symptoms to assess functional gastrointestinal disorders in children and adolescents

OBJECTIVE

The aim of this study was to develop a questionnaire assessing symptoms associated with pediatric functional gastrointestinal disorders (FGIDs) and to provide preliminary evidence for its validity and reliability in a tertiary care setting.

METHODS

The Questionnaire on Pediatric Gastrointestinal Symptoms (QPGS) was designed as both a parent report and child self-report measure based on the pediatric Rome II criteria for FGIDs. It was constructed in English, translated into French, and pilot tested in both languages. Initial validation was performed using the French version. Participants were 315 consecutive new patients aged 4 to 18, and their parents, presenting to a gastroenterology clinic and classified as having a functional problem. Content validity, item discrimination capacity, and reliability (parent-child concordance and temporal stability) were examined.

RESULTS

Analyses of parent and child reports indicated that all items were pertinent and variably distributed. Although children were reliable reporters, up to 42% of parents did not know about their children's gastrointestinal functioning. As many as 60% of parents of children 10 to 18 could not respond to questions about defecation and subjective symptoms. Concordance was generally fair to good, with Kappas and intraclass correlations of 0.40 to 0.70 on most items. Test-retest reliability was moderate to good for the majority of items.

CONCLUSION

This study supports the content validity of the QPGS. Form A is a reliable measure for parents of children 4 to 9 years old, but the child self-report Form C appears to be more reliable for 10 to 18 year olds.

Interobserver and intraobserver reliability of the Rome II criteria in children

BACKGROUND

Functional gastrointestinal disorders are common in children. It has been suggested that the diagnosis of these conditions should be based on the "pediatric Rome II" criteria. The interobserver reliability for the DSM-IV, another symptom-based criteria is considered almost perfect in multiple studies. There are no studies assessing the reliability of the Rome II criteria in children.

OBJECTIVES

To evaluate the reliability of the pediatric Rome II criteria.

METHODS

Interobserver reliability-Ten pediatric gastroenterologists and 10 fellows in pediatric gastroenterology were provided with 20 clinical vignettes, the Rome II criteria, and a list of 15 possible diagnoses. Each of the raters was instructed to select one or more diagnoses for each vignette. Intraobserver reliability-The specialists were provided with the same set of vignettes 4 months later.

RESULTS

Average percentage of agreement coefficient: 45% (specialists), 47% (fellows). In order to correct for possible agreement by chance, we calculated the kappa coefficient, a measure of pairwise agreement corrected for chance. Specialists: k = 0.37 (p < 0.0001), trainees: k = 0.41, (p < 0.0001). Physicians with a special interest in functional gastrointestinal disorders (k = 0.37, p < 0.0001), and other specialists (k = 0.38, p < 0.0001). Analysis of data in pain and constipation diagnosis subgroups revealed even lower kappa (constipation: k = 0.2, p < 0.0001; pain: k = 0.3, p < 0.0001). Intraobserver agreement: k = 0.63 (p < 0.0001).

CONCLUSION

The interobserver reliability of the Rome II criteria among pediatric gastroenterologists and fellows is low. Further validation of the criteria is necessary.

Comorbidities associated with constipation in children referred for colon manometry may mask functional diagnoses

BACKGROUND

In children with prolonged constipation of unclear pathogenesis or unresponsive to treatment, colon manometry can discriminate between functional fecal retention (FFR) and colon neuromuscular diseases.

AIM

To identify the clinical features precipitating referral for colon manometry in children with functional constipation.

METHOD

Retrospective medical record review of 173 constipated children (116 male, mean age 6.9 years, range 1-17 years) referred for colon manometry.

RESULTS

Manometry was normal in 121 (70%). In those with normal manometry, FFR was identified in 96, irritable bowel syndrome (IBS) in 10, and functional constipation in 15. Of the 96 children FFR, 72 (76%) had comorbid conditions that might have interfered with the clinician's ability to diagnose FFR. Of 52 children with colon neuromuscular disease, only 12 (23%) had comorbid conditions (P < 0.001 compared with FFR). Of children more than 4 years, those with FFR were more likely to have fecal incontinence (44 of 62; 71%) than those with other functional disorders (2 of 19; 10%; P < 0.001) or neuromuscular disease (6 of 23; 26%; P < 0.001).

CONCLUSIONS

Two thirds of children referred for colon manometry had normal studies and met criteria for a functional diagnosis. Three quarters of those with functional constipation had a comorbid condition that might alter the history sufficiently to obscure the diagnosis.

Validation of the pediatric Rome II criteria for functional gastrointestinal disorders using the questionnaire on pediatric gastrointestinal symptoms

OBJECTIVE

To validate the pediatric Rome II criteria for functional gastrointestinal disorders (FGIDs) using the Questionnaire on Pediatric Gastrointestinal Symptoms (QPGS).

METHODS

Subjects were 315 consecutive new patients, 4 to 18 years of age, seen in a tertiary care clinic and classified by pediatric gastroenterologists as having a functional problem. Patients and parents separately completed the QPGS before medical consultation. Diagnoses were derived using computer algorithms reflecting the Rome II criteria for pediatric FGIDs. Convergent validity was assessed by prevalence of diagnoses and internal validity using factor analysis to confirm symptom clusters of the criteria. Separate analyses were performed for 4 to 9 and 10 to 18 year olds, and for diagnoses based on parent and child reports.

RESULTS

In both age groups, the most prevalent diagnoses were irritable bowel syndrome (IBS) (22.0%, 35.5%), functional constipation (19.0%, 15.2%), and functional dyspepsia (FD) (13.6%, 10.1%). Parent-child concordance on diagnoses was generally poor. Factor analyses supported the internal validity of FD and of IBS symptoms except for relief with defecation. Although functional abdominal pain syndrome and abdominal migraine occurred rarely, symptom clustering within each diagnosis supports their validity. Among patients with abdominal pain, duration was of at least 3 months in most, and pain was of long duration and severe in at least one third.

CONCLUSION

More than half of patients classified as having a functional problem met at least one pediatric Rome II diagnosis for FGIDs. This study offers initial support for the validity of several of the criteria.