Understanding Childhood Incontinence: Genetic Insights
New research uncovers genetic links to common childhood urinary and bowel issues.
Oliver Bastiani, Christina Dardani, Kimberley Burrows, Jane Hvarregaard Christensen, Carol Joinson
― 7 min read
Table of Contents
- What Causes These Problems?
- A Look at the Study
- Getting the Data
- Recognizing Incontinence and Constipation
- Types of Bedwetting
- Genetic Risk Scores
- Analyzing the Data
- The Findings
- Understanding the Results
- The Importance of the Research
- Limitations to Consider
- Moving Forward
- Original Source
- Reference Links
Bedwetting, daytime urinary Incontinence, soiling, and Constipation are quite common issues faced by many kids. These problems can impact not just the children, but also their families. When children experience these issues, they may face bullying from peers, feel sad, have a poor view of themselves, and suffer mental health problems as they grow up. Among kids around the age of 7, it’s estimated that about 15% deal with bedwetting, about 7.8% have daytime urinary problems, and around 6.8% soil their pants.
As children get older, these issues tend to become less common. For instance, the number of kids who wet themselves during the day drops to about 4.9% by age 9 and further down to 2.9% by age 14. But constipation seems to stick around, with around 8.9% of children facing that issue during childhood. Sometimes, daytime urinary problems and soiling can be linked to chronic constipation in children.
What Causes These Problems?
When it comes to why kids experience incontinence and constipation, the reasons are varied and interconnected. It’s a mix of genetic, biological, neurological, psychological, and environmental factors. Studies suggest that children with certain developmental traits, such as ADHD symptoms or low IQ, are more likely to deal with these issues. Kids with mental health conditions like sadness or worry also seem to face a higher risk. Emotional and behavioral problems can make these issues worse.
While some studies show connections between these problems and certain traits, they often face limitations. For instance, how parents report their child’s symptoms might not always be accurate. Also, measuring these traits through questionnaires can sometimes misclassify whether a child actually has a problem or not.
Thanks to new research methods, scientists can now create polygenic risk scores (PRS) that estimate a person's genetic risk for certain traits. These scores use a lot of genetic information to show how much of a child’s genetic makeup may influence their chances of having incontinence and constipation. PRS doesn't get mixed up with environmental factors in the same way as observational studies do, allowing for a clearer analysis.
A Look at the Study
A recent study wanted to see if genetic risks might be linked to different types of childhood incontinence, like bedwetting and daytime accidents, and constipation. Researchers used data from a large UK birth study that followed children over the years. They focused on kids aged 9 and 14 years to see if genetic risks played a role in how frequently these issues occurred.
The researchers had a hunch that kids with a higher genetic risk for certain conditions would also have a higher chance of experiencing incontinence and constipation. They also took a closer look at different types of bedwetting, specifically seeing if kids wet the bed with or without daytime urinary issues.
Getting the Data
The data used in this study came from a long-term research project based in the UK, which followed thousands of pregnant women in the early 1990s. They gathered information on the women and their children, including how many kids were born and how they were doing in their first years of life.
As the children grew, the researchers collected further data on their health, especially regarding incontinence and constipation. They also asked questions about socioeconomic status, looking at things like parents’ jobs and education levels.
Recognizing Incontinence and Constipation
To find out how common incontinence and constipation were, researchers used parent questionnaires when the kids were 9 years old. Parents were asked about how often their child experienced bedwetting, daytime accidents, or soiling. Based on the responses, researchers could determine whether any of these problems were present.
For constipation, parents were asked whether their child had experienced the issue in the past year, allowing researchers to classify children as having constipation or not.
Types of Bedwetting
Researchers also categorized bedwetting into two types. One type was considered more complex, where children wet the bed but also experienced daytime urinary issues. The other type was when children only wet the bed at night without other issues during the day. This distinction allowed researchers to see whether genetic risks affected one type more than the other.
Genetic Risk Scores
To calculate genetic risks for incontinence and constipation, researchers looked at the latest genetic research. They gathered extensive data on various conditions like ADHD, autism, anxiety, depression, and more. After ensuring the data was high quality, they analyzed it to create risk scores for each child in the study.
These scores helped identify any genetic link between common traits and the likelihood of experiencing incontinence or constipation, allowing researchers to connect the dots between Genetics and childhood health issues.
Analyzing the Data
The study aimed to link genetic risks to incontinence and constipation types at ages 9 and 14. To do this, they used statistical methods to check if certain genetic risks were associated with these childhood issues.
They adjusted their findings for factors like gender and background genetics to ensure that they had a clear picture.
The Findings
Interestingly, the research uncovered some links between genetic risk scores, incontinence, and constipation, particularly concerning ADHD. Kids with a higher genetic risk for ADHD were more likely to show daytime urinary issues at age 9 and even constipation.
There seemed to be a connection between genetic risks for autism and incontinence issues at age 14, but the overall evidence wasn’t as strong. In fact, none of the genetic associations survived stricter statistical tests, meaning they couldn’t definitively say that genetics played a significant role.
There was also little difference noted when it came to the types of bedwetting. Though the autism genetic risk appeared to have some association with the simpler type of bedwetting, the evidence wasn’t conclusive.
In a surprising twist, genetic risks for obsessive-compulsive disorder appeared to lower the odds of experiencing the more complex type of bedwetting. This finding went against what researchers initially expected.
Understanding the Results
The researchers highlighted that their findings were unique and suggested that there could be less contribution from genetic risks compared to what earlier studies showed. Previous studies had often found stronger links between mental health, emotional problems, and incontinence in children but that wasn't the case here.
It’s possible that these different results came from the limited nature of genetic scores, which only reflect common genetic factors and might miss others that are more rare or specific.
While there was some initial evidence suggesting a link between genetic risks for depression and daytime urinary issues, the results were weak. No significant associations were found for anxiety or OCD with incontinence and constipation, apart from the unexpected link between OCD and bedwetting.
The Importance of the Research
One of the strong points of this study was the use of PRS to evaluate children at a community level. This meant that researchers weren't just looking at kids who had formal diagnoses, but rather at a broader range of children with varying levels of incontinence and constipation.
By considering multiple types of bedwetting, they were able to provide a more detailed view of how these conditions interact. This detailed approach is rare in current research.
Limitations to Consider
However, it’s essential to note some limitations in this study. The genetic scores simply reflect common genetic factors. They might miss out on important environmental influences or genetic variations that affect psychiatric conditions, which can vary between adults and children.
Furthermore, the genetic data came from mostly adult samples of European ancestry, so the results might not apply to wider populations. There was also a risk of selective dropout, as those participating with genetic data tended to be from more privileged backgrounds compared to the general study group.
Moving Forward
Despite these limitations, the researchers believe that the evidence suggests common genetic risks could be linked to childhood incontinence and constipation. They recommend that kids exhibiting signs of neurodevelopmental or psychiatric traits be assessed early for bladder and bowel issues to prevent future complications.
In conclusion, while not all findings were as clear-cut as one might hope, they open the door to further investigations into how genetic factors can influence childhood health problems. After all, if there’s a way to minimize these childhood issues, it’s worth exploring.
In the end, avoiding bedwetting is a good endeavor, not just for the kids but also for the parents who may have to deal with extra laundry!
Original Source
Title: Association of Polygenic Risk Scores for Neurodevelopmental Traits and Psychiatric Conditions with Incontinence and Constipation in Children and Young People
Abstract: Observational studies report prospective associations of neurodevelopmental and psychiatric traits with paediatric incontinence and constipation, but unmeasured and residual confounding may limit observational measures. Here, we use a prospective birth cohort study to investigate whether common variant genetic liability for a range of neurodevelopmental and psychiatric conditions are associated with paediatric incontinence and constipation. We used data from 7,857 participants from the Avon Longitudinal Study of Parents and Children (ALSPAC) with data on genotype, incontinence, and constipation, and calculated Polygenic risk scores (PRS) for neurodevelopmental traits (ADHD, autism, intelligence) and psychiatric conditions (anxiety, depression, and OCD). Incontinence subtypes (daytime urinary incontinence [DUI], enuresis [any bedwetting and enuresis subtypes: monosymptomatic, non-monosymptomatic], faecal incontinence), and constipation, were assessed by parental reports at age 9 years and self-reports at age 14. PRS for ADHD (OR=1.14, 95% CI, 1.01-1.29, unadjusted p=0.040) and depression (OR=1.09, 95% CI, 1.00-1.20, unadjusted p=0.063) were associated with DUI at age 9. PRS for autism (OR=1.19, 95% CI, 1.02-1.41, unadjusted p=0.032) and intelligence (OR=1.17, 95%, 0.99-1.38, unadjusted p=.06l) were associated with DUI at age 14. PRS for ADHD (OR=1.13, 95% CI, 1.03-1.24, unadjusted p=0.008) were associated with constipation at age 9. Within enuresis subtypes, PRS for autism were associated with MNE at age 9 (OR=1.15, 95% CI, 1.03-1.28, unadjusted p=0.012), but not NMNE (OR=0.93, 95% CI, 0.79-1.18, unadjusted p=0.335). No associations survived false discovery rate adjustment. The findings add to existing evidence that common variant genetic liability for neurodevelopmental traits and psychiatric conditions could be associated with paediatric incontinence and constipation. Key pointsO_ST_ABSQuestionC_ST_ABSAre common variant genetic liabilities for neurodevelopmental and psychiatric conditions associated with paediatric incontinence and constipation in a population-based cohort? FindingsWe found some evidence that polygenic risk scores (PRS) for ADHD, autism, intelligence, and depression may be associated with daytime urinary incontinence. PRS for ADHD were also associated with constipation and enuresis and PRS for autism and depression were weakly associated with constipation. None of the associations survived adjustment for false discovery rate. MeaningCommon variant genetic liabilities for ADHD, autism, intelligence, and depression could be risk factors for developing paediatric incontinence and constipation.
Authors: Oliver Bastiani, Christina Dardani, Kimberley Burrows, Jane Hvarregaard Christensen, Carol Joinson
Last Update: 2024-12-01 00:00:00
Language: English
Source URL: https://www.medrxiv.org/content/10.1101/2024.11.29.24318188
Source PDF: https://www.medrxiv.org/content/10.1101/2024.11.29.24318188.full.pdf
Licence: https://creativecommons.org/licenses/by-nc/4.0/
Changes: This summary was created with assistance from AI and may have inaccuracies. For accurate information, please refer to the original source documents linked here.
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