Martina Starck, Julia Grünwald, Angelika A Schlarb
8 min
While Attention Deficit Hyperactivity Disorder (ADHD) is highly heritable and frequently affects both children and their parents, clinical practice often focuses exclusively on the child's treatment. This study aimed to investigate the prevalence and symptom severity of ADHD in the parents of children already receiving clinical ADHD care in Germany. Additionally, the researchers explored whether specific ADHD subtypes (inattentive, hyperactive-impulsive, or mixed) in children are correlated with the same subtypes in their parents.
Researchers recruited 79 families with children receiving outpatient ADHD treatment at a social pediatrics center. Parents completed the Wender Utah Rating Scale (WURS-K) to retrospectively assess childhood symptoms and the ADHS-Self-Report to evaluate current adult ADHD symptoms according to DSM-5 criteria. The authors then calculated the frequency of ADHD diagnosis for mothers and fathers, categorized symptom severity, and performed statistical tests to identify potential links between parent and child symptom profiles.
Approximately 44% of the children had at least one parent who met the clinical criteria for an adult ADHD diagnosis. Specifically, 41.3% of mothers and 51.0% of fathers were identified as having ADHD. When categorized by symptom severity, a significant portion of parents fell into the medium-severity group, which the authors suggest may impact the effectiveness of standard behavioral parent training. Crucially, the study found no significant relationship between the specific ADHD subtypes of the children and those of their parents, suggesting that the clinical expression of the disorder in children does not mirror the parental presentation.
The high prevalence of parental ADHD observed suggests that addressing only the child’s symptoms may be insufficient. Parental ADHD can impair executive functioning, organizational skills, and discipline consistency, which are critical for successful parent training and child therapy outcomes. The authors argue that practitioners should screen parents for ADHD symptoms as part of a comprehensive family approach, as parents with untreated symptoms may require tailored support, additional structure, or separate therapy to maximize the child's progress.
BACKGROUND: Despite the fact that there is a large amount of research on childhood attention deficit hyperactivity disorder (ADHD) treatment and an increasing amount of research on adult ADHD, little is known about the prevalence and influence of parental ADHD. Therefore, this study examined the frequency of parental ADHD in a clinical sample of German children suffering from ADHD. We also tried to find different levels of symptom severity for prognostic relevance. Furthermore, the association between subtypes of ADHD in children and their parents was investigated. METHOD: In this study, parents of 79 ADHD children were screened for ADHD according to the Diagnostic and Statistical Manual of Mental Disorders, 5th edition and International Classification of Diseases, 10th edition. The Wender Utah Rating Scale and the ADHS-Self-Report were given to 75 mothers and 49 fathers for retrospective and current symptoms. Frequency of ADHD symptoms and severity groups was calculated and relationship between parental and children's ADHD was tested. RESULTS: ADHD occurrence for mothers of children with ADHD was 41.3%, for fathers 51.0%. About 16.0% of the mothers had a mixed type, 9.3% had a hyperactive-impulsive subtype, and 16.0% had an inattentive subtype. Of the fathers, 18.4% had a mixed type, 10.2% had a hyperactive-impulsive subtype, and 22.4% had an inattentive subtype; 61% of the mothers and 46.9% of the fathers had low symptom severity. Medium symptom severity was reported by 37.7% mothers and 46.9% fathers, while 1.3% of the mothers and 6.2% of the fathers showed severe symptoms. No significant correlation between parental and child diagnoses was observed. CONCLUSION: As nearly half of the parents suffered from ADHD, these results are a matter of concern in families with ADHD children. Besides parent-child interactions, parental ADHD symptoms might influence parental education style and also effects parent training as well as the child's therapy outcome. In the future, parents should be screened for ADHD symptoms if they or their child receive treatment and to adjust processes and design of treatment to the symptoms.
Alex: They used more than one approach, and that distinction matters. They reported how many parents exceeded questionnaire score cutoffs. Separately, they counted whether particular current symptoms were present and applied adult diagnostic symptom rules.
Sam: So readers shouldn't treat every percentage in the results as an estimate of exactly the same thing. What is a concrete example of how that second approach works?
Alex: The current questionnaire distinguishes attention problems from hyperactivity and impulsivity. That lets the researchers identify a predominantly inattentive pattern, a predominantly hyperactive-impulsive pattern, or a mixed pattern. They call these subtypes: groupings based on which symptoms predominate.
Sam: And those groupings let them ask whether a child's pattern resembles a parent's, rather than simply whether both have symptoms.
Alex: Yes. The adult classifications followed the newer diagnostic manual's symptom rules, which require fewer symptoms in adults than the previous edition. The children, however, had been diagnosed under a different classification system. That mismatch matters when interpreting the parent–child comparison.
Sam: Let's pin down the central result before the qualifications. How common was parental symptom overlap?
Alex: About 44 percent of children had at least one participating parent who met the current questionnaire-based criteria. Earlier family studies reported roughly 41 to 55 percent. So this finding broadly supports earlier evidence of family overlap rather than revealing an unexpected new rate.
Sam: That's the child-level result. Did mothers and fathers look clearly different?
Alex: The point estimates were higher for fathers, but the difference in current diagnostic classifications was not statistically significant. Fewer fathers than mothers participated, too. I wouldn't turn those estimates into a firm claim that fathers were more affected.
Sam: What about severity? The treatment argument seems especially concerned with parents whose symptoms make participation difficult.
Alex: Most mothers fell in the low-symptom group. Fathers were divided almost equally between low and medium symptom groups. High symptom levels were uncommon, contrary to the authors' expectation of similarly sized severity groups.
Sam: Then a high frequency of meeting symptom criteria doesn't mean the sample was dominated by parents with the highest symptom burden.
Alex: Those are separate findings. The severity groupings used symptom counts, while the subtype classifications considered where symptoms occurred. The authors discuss potential treatment relevance, but they did not measure whether these severity groups actually benefited differently from training.
Sam: Did the family resemblance extend to symptom patterns? That could make the findings more specific than general family overlap.
Alex: They found no significant association between parent and child subtypes. Most children had a mixed pattern, while affected parents commonly had inattentive or mixed patterns. But the different diagnostic systems limit that comparison, so this is not proof that family symptom patterns are unrelated.
Sam: The bigger concern seems to be the headline classification itself. They collected childhood histories, but did those histories constrain who counted as affected?
Alex: Not in the main frequency calculation. The authors focused on current symptoms and explicitly say they neglected childhood symptoms when identifying parental ADHD types. They acknowledge that this could overestimate clinical diagnoses. That makes “current questionnaire criteria” an essential qualifier, not a technical footnote.
Sam: There's also the possibility that the parents who completed the forms differed from those who didn't. How substantial was that problem?
Alex: The questionnaire response rate was about 44 percent. The authors suggest that parents with greater organizational difficulties might have struggled to return forms, potentially lowering the observed frequency or severity. But that's a possible explanation, not something this study demonstrated.
Sam: So one limitation could inflate the diagnostic estimate, while nonresponse could bias it in another direction. We can't simply assume those problems cancel out.
Alex: We can't. My reading is that the evidence supports a descriptive concern within this clinic sample. It doesn't establish a population prevalence, and it doesn't show that parental symptoms caused poorer child treatment outcomes.
Sam: What do the authors propose clinicians do with that concern, without confusing their recommendations with tested results?
Alex: They propose screening parents and adapting treatment when necessary. Suggested adaptations include clearer structure, repeated instructions, booster sessions, and more help transferring strategies into everyday life. These address difficulties the paper discusses, such as remembering instructions or maintaining behavior changes.
Sam: Those sound plausible, but did the paper's review establish that treating parental ADHD improves the child's outcome?
Alex: No. The authors describe a combined-treatment trial where children's externalizing behavior improved, but no more than in a counseling comparison group. They also note methodological limitations. So this study motivates better intervention research; it doesn't supply evidence that screening or treating parents improves children's outcomes.
Sam: Who should read the full document, and where should they start?
Alex: Researchers designing child ADHD interventions or parent-training studies should read it. Start with the diagnostic measures and the results explaining how parental frequency was calculated. Then read the discussion's admissions about childhood history and nonresponse before considering its proposed treatment adaptations.
Sam: And for someone who only needs the central lesson?
Alex: A child's treatment may need to account for a parent's symptoms. This study makes that worth investigating, not a proven route to better outcomes.
Sam: Keep the family in view, and the evidence in proportion.