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Featured researches published by Kawsari Abdullah.


Public Health Nutrition | 2013

Efficacy of oral iron therapy in improving the developmental outcome of pre-school children with non-anaemic iron deficiency: a systematic review.

Kawsari Abdullah; Tetyana Kendzerska; Prakesh S. Shah; Elizabeth Uleryk; Patricia C. Parkin

OBJECTIVE To systematically review the efficacy and safety of oral Fe therapy in pre-school children (1–5 years) with non-anaemic Fe deficiency, determined by children’s developmental and haematological status and the incidence of reported side-effects. DESIGN A random-effects model was used to show mean differences with 95% confidence intervals of developmental and haematological scores between Fe-treated and non-treated groups. SETTING MEDLINE, EMBASE, Cochrane library and bibliographies of identified articles were searched up to September 2011. Randomized and observational studies were assessed by two reviewers independently. Quality of the trials was assessed on the basis of concealment of allocation, method of randomization, masking of outcome assessment and completeness of follow-up. SUBJECTS From the titles of 743 articles, full text review was completed on forty-six and two randomized trials of acceptable quality met the inclusion criteria. The two trials included a total of sixty-nine children. RESULTS One study showed a statistically significant difference in the post-treatment Mental Developmental Index score among children who received oral Fe therapy v. no therapy (mean difference56?3, 95% CI 1?5, 11?0, P value not provided). Both studies showed significant improvement in serum ferritin level (mg/l: mean difference551? 1, 95% CI 33?6, 68?6, P,0?01 and mean difference517?1, 95% CI 7?5, 26?6, P value not provided, respectively) in children who received Fe therapy. CONCLUSIONS Evidence is insufficient to recommend oral Fe therapy to children with non-anaemic Fe deficiency. There is urgent need of conducting adequately powered, randomized trials examining the efficacy of oral Fe therapy in pre-school children with non-anaemic Fe deficiency.


Trials | 2015

Optimizing early child development for young children with non-anemic iron deficiency in the primary care practice setting (OptEC): study protocol for a randomized controlled trial.

Kawsari Abdullah; Kevin E. Thorpe; Eva Mamak; Jonathon L. Maguire; Catherine S. Birken; Darcy Fehlings; Anthony J. Hanley; Colin Macarthur; Stanley Zlotkin; Patricia C. Parkin

BackgroundThree decades of research suggests that prevention of iron deficiency anemia (IDA) in the primary care setting may be an unrealized and unique opportunity to prevent poor developmental outcomes in children. A longitudinal study of infants with IDA showed that the developmental disadvantage persists long term despite iron therapy. Early stages of iron deficiency, termed non-anemic iron deficiency (NAID), provide an opportunity for early detection and treatment before progression to IDA. There is little research regarding NAID, which may be associated with delayed development in young children. The aim of this study is to compare the effectiveness of four months of oral iron treatment plus dietary advice, with placebo plus dietary advice, in improving developmental outcomes in children with NAID and to conduct an internal pilot study.Methods/DesignFrom a screening cohort, those identified with NAID (hemoglobin ≥110 g/L and serum ferritin <14 μg/L) are invited to participate in a pragmatic, multi-site, placebo controlled, blinded, parallel group, superiority randomized trial. Participating physicians are part of a primary healthcare research network called TARGet Kids! Children between 12 and 40 months of age and identified with NAID are randomized to receive four months of oral iron treatment at 6 mg/kg/day plus dietary advice, or placebo plus dietary advice (75 per group). The primary outcome, child developmental score, is assessed using the Mullen Scales of Early Learning at baseline and at four months after randomization. Secondary outcomes include an age appropriate behavior measure (Children’s Behavior Questionnaire) and two laboratory measures (hemoglobin and serum ferritin levels). Change in developmental and laboratory measures from baseline to the end of the four-month follow-up period will be analyzed using linear regression (analysis of covariance method).DiscussionThis trial will provide evidence regarding the association between child development and NAID, and the effectiveness of oral iron to improve developmental outcomes in children with NAID. The sample size of the trial will be recalculated using estimates taken from an internal pilot study.Trial registrationThis trial was registered with Clinicaltrials.gov (identifier: NCT01481766) on 22 November 2011.


The Journal of Pediatrics | 2017

Re-Evaluation of Serum Ferritin Cut-Off Values for the Diagnosis of Iron Deficiency in Children Aged 12-36 Months

Kawsari Abdullah; Catherine S. Birken; Jonathon L. Maguire; Darcy Fehlings; Anthony J. Hanley; Kevin E. Thorpe; Patricia C. Parkin

&NA; An ongoing challenge has been determining clinically relevant serum ferritin cut‐offs in the diagnosis of iron deficiency in children aged 1–3 years. We identified 2 potential clinically relevant serum ferritin cut‐off values through their association with clinically important cut‐off of hemoglobin as the indicator of anemia.


Pediatric Obesity | 2017

The concurrent and longitudinal associations of temperament and nutritional risk factors in early childhood.

M. van den Heuvel; Y. Chen; Kawsari Abdullah; Jonathon L. Maguire; Patricia C. Parkin; Catherine S. Birken

Early childhood temperament is increasingly recognized as an important attribute that may impact screen time use, outdoor play and childhood obesity. The relationship between temperament and nutrition in preschool children is less clear.


BMJ Paediatrics Open | 2017

Laboratory reference intervals in the assessment of iron status in young children

Patricia C. Parkin; Jemila S. Hamid; Cornelia M. Borkhoff; Kawsari Abdullah; Eshetu G. Atenafu; Catherine S. Birken; Jonathon L. Maguire; Azar Azad; Victoria Higgins; Khosrow Adeli

Objectives The primary objective was to establish reference intervals for laboratory tests used to assess iron status in young children using the Clinical and Laboratory Standards Institute guidelines. A secondary objective was to compare the lower limit of the reference interval with the currently recommended cut-off value for haemoglobin and serum ferritin in children 1–3 years of age. Methods Blood samples were obtained from healthy children recruited during scheduled health supervision visits with their primary care physician. For our primary objective, outliers were removed; age partitions were selected and analysis of variance and pairwise comparisons were made between adjacent partitions; reference intervals and 90% CIs were calculated. For our secondary objective, we determined the proportion of children misclassified using the lower limit reference interval compared with the cut-off value. Results Samples from 2305 male and 2029 female participants (10 days to 10.6 years) were used to calculate age and sex-specific reference intervals for laboratory tests of iron status. There were statistically significant differences between adjacent age partitions for most analytes. Approximately 10% of children 1–3 years of age were misclassified (underestimated) using the lower limit of the reference intervals rather than the currently recommended cut-off values for haemoglobin and serum ferritin. Implications and relevance Clinical laboratories may consider adopting published paediatric reference intervals. Reference intervals may misclassify (underestimate) children with iron deficiency as compared with currently recommended cut-off values. Future research on decision limits derived from clinical studies of outcomes is a priority.


American Journal of Epidemiology | 2017

Vitamin D and Fracture Risk in Early Childhood: A Case-Control Study

Laura N. Anderson; Sze Wing Heong; Yang Chen; Kevin E. Thorpe; Khosrow Adeli; Andrew Howard; Etienne Sochett; Catherine S. Birken; Patricia C. Parkin; Jonathon L. Maguire; Kawsari Abdullah; Cornelia M. Borkhoff; Sarah Carsley; Mikael Katz-Lavigne; Kanthi Kavikondala; Christine Kowal; Dalah Mason; Jessica Omand; Navindra Persaud; Meta van den Heuvel; Jillian Baker; Tony Barozzino; Joey Bonifacio; Douglas Campbell; Sohail Cheema; Brian Chisamore; Karoon Danayan; Paul Das; Mary Beth Derocher; Anh Do


Paediatrics and Child Health | 2015

Risk factors, practice variation and hematological outcomes of children identified with non-anemic iron deficiency following screening in primary care setting.

Kawsari Abdullah; Kevin E. Thorpe; Jonathon L. Maguire; Catherine S. Birken; Darcy Fehlings; Anthony J. Hanley; Patricia C. Parkin


Trials | 2015

An internal pilot study for a randomized trial aimed at evaluating the effectiveness of iron interventions in children with non-anemic iron deficiency: the OptEC trial

Kawsari Abdullah; Kevin E. Thorpe; Eva Mamak; Jonathon L. Maguire; Catherine S. Birken; Darcy Fehlings; Anthony J. Hanley; Colin Macarthur; Stanley Zlotkin; Patricia C. Parkin


Academic Pediatrics | 2017

Total Breast-Feeding Duration and Dental Caries in Healthy Urban Children

Peter D Wong; Catherine S. Birken; Patricia C. Parkin; Isvarya Venu; Yang Chen; Robert J. Schroth; Jonathon L. Maguire; Kawsari Abdullah; Laura N. Anderson; Cornelia M. Borkhoff; Sarah Carsley; Mikael Katz-Lavigne; Kanthi Kavikondala; Grace Jieun Lee; Dalah Mason; Jessica Omand; Navindra Persaud; Meta van den Heuvel; Weeda Zabih; Jillian Baker; Tony Barozzino; Joey Bonifacio; Douglas Campbell; Sohail Cheema; Brian Chisamore; Karoon Danayan; Paul Das; Mary Beth Derocher; Anh Do; Michael Dorey


Paediatrics and Child Health | 2014

149: Temperament Is Associated with Free Play in Young Children

Jr Sharp; Jonathon L. Maguire; S Carsley; Kawsari Abdullah; Gerald Lebovic; Y Chen; Pc Parkin; Cs Birken

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Darcy Fehlings

Holland Bloorview Kids Rehabilitation Hospital

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Yang Chen

St. Michael's Hospital

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