Anton R. Miller

Dr. Anton R. Miller

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Research Focus & Metrics

Academic Career Length

40Years (1987-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 November 2004 in Pediatrics
Verified
Journal Article
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AKAnne F. Klassen
Anne F. Klassen
AMAnton R. Miller
Anton R. Miller
SFStuart Fine
Stuart Fine
Objective. The aim of treatment for attention-deficit/hyperactivity disorder (ADHD) is to decrease symptoms, enhance functionality, and improve well-being for the child and his or her close contacts. However, the measurement of treatment response is often limited to measuring symptoms using behavior rating scales and checklists completed by teachers and parents. Because so much of the focus has been on symptom reduction, less is known about other possible health problems, which can be measured easily using health-related quality-of-life (HRQL) questionnaires, which are designed to gather information across a range of health domains. The aim of our study was to measure HRQL in a clinic-based sample of children who had a diagnosis of ADHD and consider the impact of 2 clinical factors, symptom severity and comorbidity, on HRQL. Our specific hypotheses were that parent-reported HRQL would be poorer in children with ADHD than in normative US and Australian pediatric samples, in children with increasing severity of ADHD symptoms, and in children who had diagnoses of comorbid psychiatric disorders. Methods. Cross-sectional survey was conducted in British Columbia, Canada. The sample included 165 respondents of 259 eligible children (63.7% response rate) who were referred to the ADHD Clinic in British Columbia between November 2001 and October 2002. Children who are seen in this clinic come from all parts of the province and are diverse in terms of socioeconomic status and case mix. ADHD was diagnosed in 131 children, 68.7% of whom had a comorbid psychiatric disorder. Some children had >1 comorbidity: 23 had 2, 5 had 3, and 1 had 4. Fifty-one children had a comorbid learning disorder (LD), 45 had oppositional defiant disorder or conduct disorder (ODD/CD), and 27 had some other comorbid diagnosis. The mean age of children was 10 years (standard deviation: 2.8). Boys composed 80.9% (N = 106) of the sample. We used the 50-item parent version of the Child Health Questionnaire to measure physical and psychosocial health. Physical domains include the following: physical functioning (PF), role/social limitations as a result of physical health (RP), bodily pain/discomfort (BP), and general health perception (GH). Psychosocial domains include the following: role/social limitations as a result of emotional-behavioral problems (REB), self-esteem (SE), mental health (MH), general behavior (BE), emotional impact on parent (PTE), and time impact on parents (PTT). A separate domain measures limitations in family activities (FA). There is also a single-item measure of family cohesion (FC). Individual scale scores and summary scores for physical (PhS) and psychosocial health (PsS) can be computed. Symptom severity data (parent and teacher) came from the Child/Adolescent Symptom Inventory 4. These checklists provide information on symptoms for the 3 ADHD subtypes (inattentive, hyperactive, and combined). Each child underwent a comprehensive psychiatric assessment by 1 of 4 child psychiatrists. Documentation included a full 5-axis Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition diagnosis on the basis of a comprehensive assessment. Clinical information for each child was extracted from hospital notes. Results. Compared with both population samples, children with ADHD had comparable physical health but clinically important deficits in HRQL in all psychosocial domains, FA, FC, and PsS, with effect sizes as follows: FC = −0.66, SE = −0.90, MH = −0.97, PTT = −1.07, REB = −1.60, BE = −1.73, PTE = −1.87, FA = −1.95, and PsS = −1.98. Poorer HRQL for all domains of psychosocial health, FA, and PsS correlated significantly with more parent-reported inattentive, hyperactive, and combined symptoms of ADHD. Children with ≥2 comorbid disorders differed significantly from those with no comorbidity in most areas, including RP, GH, REB, BE, MH, SE, PTT, FA, and PsS, and from those with 1 comorbid disorder in 3 domains, including BE, MH, and FA and the PsS. The mean PsS score for children in the ODD/CD group (mean difference: −12.9; effect size = −1.11) and children in the other comorbidity group (−9.0; effect size = −.77) but not children in the LD group were significantly lower than children with no comorbid disorder. Predictors of physical health in a multiple regression model included child's gender (β = .177) and number of comorbid conditions (β = −.197). These 2 variables explained very little variation in the PhS. Predictors of psychosocial health included the number of comorbid conditions (β = −.374) and parent-rated combined ADHD symptoms (β = −.362). These 2 variables explained 31% of the variation in the PsS. Conclusions. Our study shows that ADHD has a significant impact on multiple domains of HRQL in children and adolescents. In support of our hypotheses, compared with normative data, children with ADHD had more parent-reported problems in terms of emotional-behavioral role function, behavior, mental health, and self-esteem. In addition, the problems of children with ADHD had a significant impact on the parents' emotional health and parents' time to meet their own needs, and they interfered with family activities and family cohesion. The differences that we found represent clinically important differences in HRQL. Our study adds new information about the HRQL of children with ADHD in relation to symptom severity and comorbidity. Children with more symptoms of ADHD had worse psychosocial HRQL. Children with multiple comorbid disorders had poorer psychosocial HRQL across a range of domains compared with children with none and 1 comorbid disorder. In addition, compared with children with no comorbidity, psychosocial HRQL was significantly lower in children with ODD/CD and children in the other comorbidity group but not in children with an LD. The demonstration of a...

1 July 2009 in American Journal of Public Health
Verified
Journal Article
Closed access
JBJamie Brehaut
Jamie Brehaut
DKDafna E. Kohen
Dafna E. Kohen
RGRochelle E. Garner
Rochelle E. Garner
AMAnton R. Miller
Anton R. Miller
LLLucyna M. Lach
Lucyna M. Lach
PRPeter L. Rosenbaum
Peter L. Rosenbaum
Objectives. We used population-based data to evaluate whether caring for a child with health problems had implications for caregiver health after we controlled for relevant covariates.Methods. We used data on 9401 children and their caregivers from a population-based Canadian study. We performed analyses to compare 3633 healthy children with 2485 children with health problems. Caregiver health outcomes included chronic conditions, activity limitations, self-reported general health, depressive symptoms, social support, family functioning, and marital satisfaction. Covariates included family (single-parent status, number of children, income adequacy), caregiver (gender, age, education, smoking status, biological relationship to child), and child (age, gender) characteristics.Results. Logistic regression showed that caregivers of children with health problems had more than twice the odds of reporting chronic conditions, activity limitations, and elevated depressive symptoms, and had greater odds of reporting poorer general health than did caregivers of healthy children.Conclusions. Caregivers of children with health problems had substantially greater odds of health problems than did caregivers of healthy children. The findings are consistent with the movement toward family-centered services recognizing the link between caregivers' health and health of the children for whom they care.

21 December 2009 in BMC Health Services Research
Verified
Journal Article
Open access
PDF file
AMAnton R. Miller
Anton R. Miller
CCChristopher J Condin
Christopher J Condin
WMWilliam H McKellin
William H McKellin
NSNicola Shaw
Nicola Shaw
AKAnne F Klassen
Anne F Klassen
SSSam Sheps
Sam Sheps
Continuity of care has been explored largely from academic and service provider perspectives, and in relation to adult patient/client groups. We interviewed parents of children with complex chronic health conditions to examine how their experiences and perceptions of continuity of care fit with these perspectives; and to identify the salient factors in the experience of, and factors contributing to, continuity in this population.

11 April 2006 in Child: Care, Health and Development
Verified
Journal Article
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AKA. F. Klassen
A. F. Klassen
AMAnton R. Miller
Anton R. Miller
SFS. Fine
S. Fine

1 February 2003 in Pediatrics
Verified
Journal Article
Closed access
PDF file
JBJamie Brehaut
Jamie Brehaut
AMAnton R. Miller
Anton R. Miller
PRParminder Raina
Parminder Raina
KMKimberlyn M. McGrail
Kimberlyn M. McGrail
Context. While an association between pediatric behavioral disorders and injuries is generally acknowledged, no studies have measured the risk for injury in the context of a large, population-based study that is free of cohort biases. Objectives. To examine the association between childhood behavior disorders ([CBDs] as indicated by prescription for methylphenidate [MPH]) and a variety of injury outcomes, and to evaluate the risk for injury among these children after controlling for known demographic correlates. Design. Population-based database analysis of all children in British Columbia (BC) under the age of 19 as of December 31, 1996; comparison of those who had been prescribed MPH and therefore placed in the CBD group (n = 16 806) and those who were not (n = 1 010 067). Demographic information collected was as follows: age, sex, measures of socioeconomic status, and region of residence. Outcome Measures. Common types of childhood injury in BC: International Classification of Diseases, Ninth Revision N-codes (fractures, open wounds, poisoning/toxic effect, concussion, intracranial, burns) and E-codes (falls, postoperative complications, motor vehicle accidents, struck by object, adverse effects of drugs, suffocation, drowning). Data Source. BC Linked Health Data Set and the BC Triplicate Prescription Program. Results. After controlling for known demographic correlates, odds for injury was greater among those treated with MPH and presumed to have a behavioral disorder, when injury was characterized either by type (1.67; 99% confidence interval: 1.54–1.81) or cause (1.52; 99% confidence interval: 1.40–1.66) of injury. This increased risk extended to unexpected categories of injury such as postoperative complications and adverse effects of drugs. Conclusions. Children with CBDs have >1.5 times the odds of sustaining injuries of a variety of types from a variety of causes, even after controlling for known demographic correlates, than those without behavioral disorders. The risks for these children extend beyond those that might be directly associated with impulsivity and overactivity. Injury prevention strategies aimed at this group of children and youth would be beneficial. Policy-makers should account for increased risk of a wide variety of injuries in this group of children and youth.

1 January 2009 in Disability and Rehabilitation
Verified
Journal Article
Closed access
LLLucyna M. Lach
Lucyna M. Lach
DKDafna E. Kohen
Dafna E. Kohen
RGRochelle E. Garner
Rochelle E. Garner
JBJamie C. Brehaut
Jamie C. Brehaut
AMAnton R. Miller
Anton R. Miller
PRPeter L. Rosenbaum
Peter L. Rosenbaum
Purpose. Children with neurodevelopmental disorders (Neuro) pose complex parenting challenges, particularly if the condition co-occurs with behaviour problems. Such challenges are likely to impact caregiver health and well-being. This study explores the extent to which caregivers of children with both ‘Neuro’ and behaviour problems differ in their physical and psychosocial outcomes from caregivers of children with either condition or neither condition. Method. The first wave of data collected in the National Longitudinal Survey of Children and Youth in Canada (1994) was used to identify four groups of caregivers of 4 to 11-year-old children: caregivers of children with a ‘Neuro’ disorder and externalising behaviour problems (Both; n = 414), caregivers of children with a ‘Neuro’ disorder only (Neuro Only; n = 750), caregivers of children with an externalising behaviour problem only (Ext Only; n = 1067), and caregivers of children with neither health condition (Neither; n = 7236). Results. Caregivers in the ‘Both’ group were least likely to report excellent or very good health, and more frequently reported chronic conditions such as asthma, arthritis, back problems, migraine headaches, and limitations in activities as compared to the ‘Neither’ group. This group also exhibited higher depression scores, experienced more problematic family functioning, and reported lower social support than the ‘Neither’ group. Scores for caregivers in the ‘Ext Only’ and ‘Neuro Only’ groups tended to lie between the ‘Both’ and ‘Neither’ group scores and often did not differ from one another. Conclusions. Caregivers of children with both neurodevelopmental disorders and behaviour problems exhibited a greater number of health and psychosocial problems. While addressing children's behaviour problems, health care professionals should also consider caregiver physical and psychosocial health as this may also have an impact on children's well-being.