Introduction
Elimination disorders (ED) include enuresis, the repeated passing of urine during the day or night into inappropriate places with a frequency of at least twice a week for at least 3 consecutive months in children older than 5 years of age, or encopresis, which is an involuntary or intentional repeated passage of feces into inappropriate places. At least one such event occurs each month for at least 3 months for children older than 4 years [
1]. The occurrence is not attributed to any underlying anatomic or neurologic abnormalities and cannot be the direct effect of a substance’s [
2].
Elimination disorder has been found to be prevalent worldwide; it affects around 0.7 percent to 29.6 percent of the paediatric population. Daytime urinary incontinence at age 7 varies from 6.3 to 9.0%; about 10% to 20% of 7–year-olds get their beds wet on a regular basis; and the magnitude of encopresis among the paediatric population ranges from 0.3 to 8% of children in Western society [
3‐
6].
Elimination disorder leads to social, family, and psychological problems. The problem impacts the lives of children and adolescents and puts them at risk for social isolation, peer conflict, teasing, and classroom challenges. As a result, children and adolescents with elimination disorders often suffer from low self-esteem and psychological problems. But in so many other areas of human life, the scientific approach to human waste elimination disorders has dramatically reduced the meanings attributed to them and almost all of the problems they can cause [
7,
8].
Parents and teachers are poorly informed about barriers to paediatric elimination disorder; as a result, its magnitude is under reported, and children and adolescents with elimination disorder are less understood by medical and mental health professionals [
9,
10]. Despite its serious effects on children, adolescents, families, and society, the magnitude of elimination disorder is poorly understood due to limited research on it [
8]. Furthermore, the prevalence of enuresis and encopresis is rarely studied in developing countries, despite the fact that there are factors in these countries that could affect it [
11]. Studying the prevalence and associated factors of elimination disorder has critical input to good physical function and outcomes in children and adolescents [
7]. Moreover, up to the level of the researchers search and knowledge, there is a lack of adequate information about elimination disorders among the paediatric population in Ethiopia. So, the current study aimed to assess elimination disorder and its associated factors among children and adolescents aged 5–14 years old attending the paediatric outpatient Clinic at Wolaita Sodo University Comprehensive Specialized Hospital in Wolaita Sodo, South Ethiopia.
Methods and materials
Study area and period
A study was conducted at Wolaita Sodo University Comprehensive Specialized Hospital (WSUCSH) from September 22 to November 22, 2022. The hospital is located in Wolaita Sodo town, 329 km south of Addis Ababa, the capital city. The hospital delivers different medical services for outpatients, emergency patients, and inpatients for approximately 450–500 patients per day, and the total service coverage of the hospital is about more than 3 million people in its catchment areas. The paediatric department has six major wings: paediatric outpatient, paediatric Emergency (admission and outpatient unit), Neonatal Intensive Care Unit, paediatric surgical admission ward, paediatric medical admission ward, and stabilization center unit.
Study design
A hospital-based cross-sectional study design was conducted.
Population
All children and adolescents ages 5–14 who attended WSUCSH Paediatric outpatient department services during the data collection period were included in the study. Children and adolescents who were critically ill to the extent of being unable to communicate during data collection and who had known anatomical abnormalities of the urinary tract or bowel due to medical (biogenic or neurological) causes were excluded from the study.
Sampling technique and procedure
The required sample size for this study was determined by using a single population proportion formula with the following assumption: estimated prevalence (P) of elimination disorder at 50%, as there is a lack of published studies that show the magnitude and associated factors of elimination disorder in Ethiopia, a 95% confidence interval (CI), a 5% margin of error (W), and a 10% non-response rate. Accordingly, the final sample size was 423. A systematic random sampling technique was used to select the study participants. To select the desired sample, the average number of paediatric patients who visited the paediatric outpatient department within the last three months before the study was identified from the client registration. On the basis of this, the expected client flow rate during the study period was estimated to be 2350. Then the sampling interval (k) was calculated by dividing the expected number of patients visiting the unit during the study period (N) by the determined sample size (n) of respondents, and it was found to be 5. The lottery method was used to select the first subject from interval 1−K, and then every K interval of the sample was selected up to collect the required sample size.
Study variable
The dependent variable was Elimination disorder, and the independent variables were socio-demographic characteristics (child sex, child age, ethnicity, religion, residence, child educational level, family marital status, and parent’s educational level, parental occupation, living circumstances of the child, family size, and family average monthly income). Clinical and biological factors of children and their mothers (maternal substance use, family history of elimination disorder, terms of pregnancy, route of delivery, duration of labor, snoring, and child exclusive breastfeeding method during the first 6 months), Psychosocial factors (history of post-traumatic or stressful events, child’s difficult behavior (behavioral problems, hyperactivity, conduct, and emotional problems), parenting practices [good (positive) parenting and bad parenting (inconsistent discipline and poor supervision), toilet training skill (low, medium, and high), and method to assist child’s elimination problem (Punishment as discipline and giving sugary beverage)].
Data collection instrument
Development of Symptom Score for Dysfunctional Elimination Syndrome (DSSDES)
The presence of elimination disorder among children and adolescents aged 5–14 years old was assessed using a new valid Development of Symptom Score for Dysfunctional Elimination Syndrome (DSSDES) tool. The questionnaire contained two measures in which Vancouver/DSS/ and DES questioners had a 14-item condition-specific measure to evaluate symptoms of bladder or enuresis (items 1–10) and bowel dysfunction or encopresis (items 11–13). The last item, number 14, which evaluates the difficulty of the measurement but is not used to assess elimination disorder since it evaluates how easy it was to answer the item number 1–13 questions, for this reason, the tool recommends excluding it during scoring, and all remaining items are weighted equally. All item responses are scored using a 5-point Likert scale, with scores ranging from 0 (no complaints) to 4 (severe symptoms). Total scores range from 0 to 52, with a cutoff score of ≥ 11 for the DSSDES of Vancouver questioners with a sensitivity of 80% and a specificity of 91% have the ability to detect paediatric elimination disorders [
12]. The presence of enuresis was assessed by a cutoff score ≥ 8.5 for items 1 to 10 in the DSSDES of Vancouver questioners, which is adopted and validated from the dysfunctional voiding symptom score (DVISS) [
13] and encopresis was assessed by using a cutoff score ≥ 3.5 for items 11 to 13 in the DSSDES of Vancouver questioners, which is adopted and validated from the parental questionnaire on enuresis and urinary incontinence, PQ_EnU [
14]. The presence of nocturnal and diurnal enuresis is assessed by the DSM-5 definition as wetting at night or during the day with a frequency of at least twice a week for at least three consecutive months [
15]. The DSSDES Rating Scale was pretested for reliability in the current study setting and was found to be easily understood by the participants with internal consistency (Cronbach’s alpha = 0.86).
Strengths and Difficulties Questionnaire Parent Report (SDQ-PR)
Children and adolescents with difficult behavioral problems were assessed by the strengths and difficulties questionnaire parent report (SDQ-PR). It has 25 items subdivided into five subscales of five items each, which measure hyperactivity, emotional symptoms, conduct problem symptoms, interpersonal relationships, and pro-social behavior. A 25-item 3-point Likert scale with a total score of 0–40 without a pro-social behavioral subscale ‘Somewhat true’ is always scored as 1, but the scoring of not True’ and certainly True’ varies with the item. Without the pro-social behavioral subscale, the overall optimum cutoff point ≥ 17 of the SDQ-PR has the ability to screen behavioral problems with sensitivity of 70.96% and specificity of 69.15%, and the optimum cutoff score for subscales is ≥ 7 for hyperactive-inattentive problems, ≥ 4 for conduct, and ≥ 5 for emotional problems [
16]. The SDQ-PR rating scale was pretested for reliability in our setup and was found to have internal consistency (Cronbach’s alpha = 0.79).
Child Trauma Screening Questionnaire (CTSQ)
Children's and adolescents trauma was assessed by the CTSQ. The CTSQ assesses re-experiencing (5 items) and hyper-arousal symptoms (5 items). The response was yes (scored 1) or no (scored 0) to whether they have experienced the symptoms since the event, and an optimal cutoff score of ≥ 5 was derived as providing the best prediction of whether children and adolescents have trauma [
17]. In the current study setting the internal consistency of Cronbach’s alpha for the scale was 0.76.
Alabama Parenting Questionnaire APQ-9
Child and adolescent parenting practices were assessed by the APQ-9. It has three items chosen for each of the factors of good parenting (positive) and bad parenting (inconsistent discipline and poor supervision). APQ-9 item 5-point Likert scale: never (1), almost never (2), sometimes (3), often (4), always (5). Mean scores of 4.48 and above indicate good parenting and bad parenting (mean scores of 2.73 to 4.48 indicate inconsistent discipline, and mean scores of 1 to 2.73 indicate poor supervision) [
18]. In our setup, the internal consistency of Cronbach’s alpha was 0.871.
Toilet training skills for children and adolescents were assessed by the paediatric assessment tool for toilet training skills for the issuing of products. The tool has 11 items with different Likert scales, which are scored as follows: score ≥ 30 has low toilet training skill; score 17–29 has medium toilet training skill; score ≤ 16 has high toilet training skill [
19]. The internal consistency of Cronbach’s alpha in the current study was 0.799. Other questionnaires adopted from previous studies for possible associated factors related to elimination disorder were methods to assist children with elimination disorder, socio-demographic variables, and biological or clinical factors included [
20,
21].
Data collection procedure
Data were collected from parents for children aged 5 to 8 years, and from children and adolescents aged 9 to 14 years, a structured face-to-face interviewer-administered questionnaire was used. Data were collected by six trained Bachelor of Science degree holders in psychiatry and supervised by two Mental Health specialists.
Data quality management
The questionnaire was first prepared in English, translated into Amharic and Wolaita, and then re-translated into English by experts in all three languages, including mental health specialists, to check its consistency. Two days of training were given for data collectors and supervisors. Reliability of tools was checked, and a pre-test was conducted for 5% (n = 22) of the sample size at Humbbo Tebela primary hospital, 20 km away from the study area, to identify potential problems in data collection tools and modification of the questionnaires. Regular supervision and support were given to data collectors by the supervisors and principal investigator. Data was checked for completeness and consistency by supervisors and principal investigators on a daily basis during data collection time.
Data processing, analysis and presentation
Data were entered into Epi Data Version 4.6 and analyzed using SPSS version 25 statistical software; descriptive statistics were used to describe the sample characteristics and assess the magnitude of ED. Multicollinearity was checked by the variance inflation factor (VIF < 2), which indicates that independent variables are not correlated to each other or there is no Multicollinearity and the selected model was a good logistic regression model fit, since the Hosmer–Lemeshow goodness-of-fit P-value was 0.58 it is greater than 0.05. The association between independent variables and the outcome variable was investigated using logistic regression analysis. Variables with a p-value < 0.25 in bivariate binary logistic regression analysis were entered into multivariable logistic regression analysis and variables with a p-value < 0.05 in multivariable logistic regression analysis were considered to have a significant association. A 95% CI and Odds ratio with corresponding p-value < 0.05 were used to determine the predictors of the outcome variable.
Discussion
In this study, the total magnitude of elimination disorders was 16.8%, which is consistent with a similar study conducted in Germany (14.8%), Australia (18.2%), Egypt (15.7%) and Kenya (14.5%) [
22‐
25]. However, the magnitude of elimination disorder in this study is higher than the studies conducted in Iran (5.4%), the United States (4.45%), and Hong Kong (3.1%) [
26‐
28]. The possible reason for the difference between the Iran study and the current study is that the former was done in the community among children age 6–18 years and used the Kiddie-Schedule for Affective Disorders and Schizophrenia for School-Age Children—Present and Lifetime Version (K-SADS-PL DSM-IV) to discriminate elimination disorders, whereas the present study is hospital-based among children and adolescents aged 5–14 years and used the DSSDES tool and DSM-5 to identify elimination disorders. Furthermore, differences between the United States study and the present study might be explained by differences in the data collection tools employed, as they used a computerized version of the Diagnostic Interview Schedule for Children (C-DISC 4.0) to detect elimination disorder, and their ages ranged from 8 to 11 years. Furthermore, the Hong Kong study differed from this one in that it was conducted in a school setting and used only symptoms criteria to differentiate elimination disorders, such as frequency of wetting or soling. However, this study applied standard instruments, the DSSDES tool and the DSM-5, to detect elimination disorder.
The magnitude of elimination disorder found in this study is lower than studies conducted in southern Brazil (35.2%), China (59%), and Korea (46.4%), covering both enuresis and encopresis [
29‐
31]. The difference between the study conducted in southern Brazil and the present study might be that the former was performed by using DVISS to measure elimination disorder among 580 samples of children in an urban community; however, the present study is conducted in a hospital setting among 417 samples and uses different tools to identify elimination disorder. Additionally, the difference between China and our study could be that the former was performed by using pediatric dysfunctional voiding scales to measure the frequency of enuresis or encopresis to identify elimination disorders in 156 samples from 10 different countries, whereas the present study collected 417 participants from a single study area. Another possible difference between the Korea and current studies is that the former involved 19,240 children (5–13 years old), and elimination disorder was measured using dysfunctional voiding symptoms (DVSs) and abnormal bowel habits (ABHs). Whereas the current study is conducted in 417 children (5–14 years old) and DSM-5 criteria are used to identify elimination disorder in addition to the Korea study.
In this study, younger age groups (9–11 years) were 3.2 times more likely to have elimination disorder than older age groups (12–14 years), which is in line with studies conducted in Turkey, Iraq, and Santo Domingo, Dominican Republic [
32‐
34]. For a number of reasons, an association between elimination disorder and age has been described. The most crucial reason was that as age increased, elimination disorders decreased. Furthermore, it appeared to be an elimination disorder related to age, psychological development, and physical development to achieve bladder and bowel control at the expected age [
7,
35]. According to evidence, elimination disorder drops by 20% in 5-year-old children and by 1–2% by the end of adolescence. The prevalence of enuresis was similarly found in this study: nocturnal enuresis in ages 5–8 was 13.4%, 9–11 was 7.3%, 12–14 was 2.4%, and diurnal enuresis in ages 5–8 was 4.05%, 9–11 was 0.8%, and 12–14 was 0.4%, with a mean age of 8.3 years. This is consistent with the study mentioned in the Synopsis of Psychiatry book, which reported that by age 7 years the prevalence was reported to be 15.2%, by age 10 the overall prevalence was reported to be 3%, and the rate drops dramatically for teenagers aged 14 years, where the prevalence is only 1.5 percent [
36]. Another possible explanation might be that children get better at understanding problems as they get older. However, younger kids have a harder time understanding how to rationally solve problems than older kids, which makes them less aware of elimination disorders and more likely to accept inappropriate urination or defecation as a solution to their problem rather than reporting their parents to obtain medical care [
37].
Similarly, the odds of elimination disorder among children and adolescents living in family sizes of four and above were 3.4 times higher than the odds in children and adolescents who reside in family sizes below four, which is in agreement with a study done in Turkish [
38] who discovered that the odds of elimination disorder were higher in children from large families than small families. This could be due to a lack of family support for the child or a child’s refusal to use the bathroom to satisfy an unsatisfied psychological need due to family size, which exposes them to elimination disorders. Elimination disorder was also more common in larger families; the main reason may be the stress associated with jealousy and anxiety that exists in the family, where attention is diverted toward other relatives who live in the house [
32,
39]. Furthermore, in large families, most family problems usually arise when there is a lot of conflict or tension for different reasons. In such families, children do not feel safe or secure. Such children tend to internalize their feelings and bottle them deep inside. It can lead to elimination disorders as they try to find a way to express themselves and release their suppressed emotions [
40].
In this study, children and adolescents who have a family history of elimination disorder were 3.9 times more likely to have this disorder than those who have no family history of elimination disorder; this was also reported in previous studies conducted in Taiwan which explained that genetically parents who have this disorder increase the occurrence of this disorder in kids. Furthermore regions on chromosomes 8, 12, and 13 are associated with a higher risk of elimination disorder in children and adolescents [
41].
According to the findings of this study, the odds of having an elimination disorder were 2.2 times higher among children and adolescents who have emotional problems compared to those who do not. This finding was supported by previous studies conducted in Belgium and Iran [
42,
43]. This association might be linked to elimination disorder because it can lead to embarrassment for the child or adolescents and disappointment for parents. Children and adolescents with emotional problems can have behavior problems that interfere with toilet training and refuse to use the bathroom, so children and adolescents with ED are at higher risk for emotional problems [
42‐
45]. Nevertheless, elimination disorder in children and adolescents with psychological disorders like emotional problems is the most common, and vice versa [
46,
47].
This study observed that the odds of having elimination disorder were 3.8 times higher among children and adolescents who have hyperactive problems compared to those who have no hyperactive problems. This is in agreement with a study conducted in Germany [
22]. One possible explanation for this association is that children and adolescents who have a hyperactive problem accept elimination disorder as a normal occurrence, and they sometimes have a reluctance to use the toilet room due to a preoccupation with play activities that may aggravate elimination symptoms or put them at high risk of developing elimination disorder [
48,
49].
According to this study, the odds of having an elimination disorder were 4.4 times higher in children and adolescents who had bad parenting practices (poor supervision) than in those who had good (positive) parenting practices. This finding was similar to previous studies conducted in China and South Africa [
50,
51]. One possible reason might be that children and adolescents who have bad parenting practices (poor supervision) can experience parental corporal punishment in the form of hitting, punching, kicking, or beating. This can cause kids to be preoccupied with anxiety or fear in response to their parents’ poor parenting practices; as a result, the children and adolescents may have nightmares reliving terrifying trauma, which causes them to wake up suddenly and urinate or defecate in their bed or underwear. Furthermore, this makes them reluctant to report their elimination problem to their parents, putting them at high risk of developing an elimination disorder [
38,
50‐
52].
This study observed a significant association between elimination disorder and low toilet training skill; children and adolescents with low toilet training skill were 5.9 times more likely to have an elimination disorder than those with high toilet training skill. This finding was the same as that of a study conducted in Nigeria [
53]. A possible explanation for this association might be that starting toilet training skills without regard for the child’s emotional readiness or cooperation makes the child reluctant to learn toilet training methods, resulting in low toilet training skills, which puts the child and adolescents at high risk for elimination disorder [
54,
55]. Also, maybe there was an incorrect toilet training method or child’s behavioral problems that can cause the child or adolescents to attain low toilet training skill, which leads to significant physical and psychological consequences and persistent elimination symptoms, such as enuresis and encopresis [
56,
57]. A child or adolescents will develop a sense of autonomy that will eventually lead them to the virtue of wellbeing if they are successfully skilled in toilet training within the appropriate years. Yet if the children and adolescents are unable to do so, it may result in a psychological crisis of shame and doubt. These crises frequently cause embarrassment among peers and have been linked to psychological and elimination disorders in kids [
58,
59].
Conclusion and recommendation
This study revealed that 1 in 5 children and adolescents have an elimination disorder. Child age, large family size four and above, family history of elimination disorder, child and adolescents emotional and hyperactive problems, child and adolescents had bad parenting practices and low toilet training skill were identified as significant factors associated with elimination disorder. Therefore, as a paediatric public health issue, elimination disorder calls for intervention at all levels, including preventative, etiological, therapeutic, and curative. Furthermore, early toilet training, supportive parenting practices, screening for children's and adolescents’ behavioral problems, and elimination disorders need attention to reduce the effect of the problem.
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