Tonya Kara

Epidemiology and outcome of acute kidney injury in New Zealand children

Objectives:  To determine the aetiology, incidence and short‐term outcomes of New Zealand children with acute kidney injury (AKI) requiring renal replacement therapy (RRT) over a 6‐year period.

Socio‐economic status and quality of life in children with chronic disease: A systematic review

Reduced quality of life (QoL) is a known consequence of chronic disease in children, and this association may be more evident in those who are socio‐economically disadvantaged. The aims of this systematic review were to assess the association between socio‐economic disadvantage and QoL among children with chronic disease, and to identify the specific socio‐economic factors that are most influential. MEDLINE, Embase and PsycINFO were searched to March 2015. Observational studies that reported the association between at least one measure of social disadvantage in caregivers and at least one QoL measure in children and young people (age 2–21 years) with a debilitating non‐communicable childhood disease (asthma, chronic kidney disease, type 1 diabetes mellitus and epilepsy) were eligible. A total of 30 studies involving 6957 patients were included (asthma (six studies, n = 576), chronic kidney disease (four studies, n = 796), epilepsy (14 studies, n = 2121), type 1 diabetes mellitus (six studies, n = 3464)). A total of 22 (73%) studies reported a statistically significant association between at least one socio‐economic determinant and QoL. Parental education, occupation, marital status, income and health insurance coverage were associated with reduced QoL in children with chronic disease. The quality of the included studies varied widely and there was a high risk of reporting bias. Children with chronic disease from lower socio‐economic backgrounds experience reduced QoL compared with their wealthier counterparts. Initiatives to improve access to and usage of medical and psychological services by children and their families who are socio‐economically disadvantaged may help to mitigate the disparities and improve outcomes in children with chronic illnesses.

Phenotypic variability of Dent disease in a large New Zealand kindred

BackgroundDent disease 1 is a rare cause of chronic kidney disease (CKD) in childhood secondary to mutations in the gene encoding the chloride–proton exchanger, CLC-5, which is found mainly in the proximal tubule. Clinical manifestations are variable and there are no known genotype–phenotype correlations.Case diagnosis/treatmentThe proband was identified as having a mutation in CLCN5. The extended family of the proband was invited to participate in a study of Dent disease after several males were noted to have a history of CKD. Urine retinol binding protein, urine calcium, serum creatinine, and DNA samples were collected for analysis. Ten hemizygous males and 6 heterozygous females were identified. Advanced CKD was detected in 3 males (1 child). Renal biopsies in 4 children showed both glomerular and tubulo-interstitial changes. There was no correlation between age and disease severity.ConclusionsThis is the first reported family from the southern hemisphere with this condition. A novel CLCN5 mutation is described, c.1618G>C (p.Ala540Pro). The severity of renal disease varies greatly among individuals.

Children's experiences and expectations of kidney transplantation: A qualitative interview study: Child transplantation experiences

Kidney transplantation offers improved quality of life and life expectancy compared with dialysis for children. This study aims to understand the experiences and expectations of children during the kidney transplantation process to inform clinical care.

Neurocognitive and Educational Outcomes in Children and Adolescents with CKD A Systematic Review and Meta-Analysis

BACKGROUND AND OBJECTIVES Poor cognition can affect educational attainment, but the extent of neurocognitive impairment in children with CKD is not well understood. This systematic review assessed global and domain-specific cognition and academic skills in children with CKD and whether these outcomes varied with CKD stage. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Electronic databases were searched for observational studies of children with CKD ages 21 years old or younger that assessed neurocognitive or educational outcomes. Risk of bias was assessed using a modified Newcastle-Ottawa scale. We used random effects models and expressed the estimates as mean differences with 95% confidence intervals stratified by CKD stage. RESULTS Thirty-four studies (25 cross-sectional, n=2095; nine cohort, n=991) were included. The overall risk of bias was high because of selection and measurement biases. The global cognition (full-scale intelligence quotient) of children with CKD was classified as low average. Compared with the general population, the mean differences (95% confidence intervals) in full-scale intelligence quotient were -10.5 (95% confidence interval, -13.2 to -7.72; all CKD stages, n=758), -9.39 (95% confidence interval, -12.6 to -6.18; mild to moderate stage CKD, n=582), -16.2 (95% confidence interval, -33.2 to 0.86; dialysis, n=23), and -11.2 (95% confidence interval, -17.8 to -4.50; transplant, n=153). Direct comparisons showed that children with mild to moderate stage CKD and kidney transplants scored 11.2 (95% confidence interval, 2.98 to 19.4) and 10.1 (95% confidence interval, -1.81 to 22.0) full-scale intelligence quotient points higher than children on dialysis. Children with CKD also had lower scores than the general population in executive function and memory (verbal and visual) domains. Compared with children without CKD, the mean differences in academic skills (n=518) ranged from -15.7 to -1.22 for mathematics, from -9.04 to -0.17 for reading, and from -14.2 to 2.53 for spelling. CONCLUSIONS Children with CKD may have low-average cognition compared with the general population, with mild deficits observed across academic skills, executive function, and visual and verbal memory. Limited evidence suggests that children on dialysis may be at greatest risk compared with children with mild to moderate stage CKD and transplant recipients.

Quality of life of children and adolescents with chronic kidney disease: a cross-sectional study

Objective The aim was to compare quality of life (QoL) among children and adolescents with different stages of chronic kidney disease (CKD) and determine factors associated with changes in QoL. Design Cross-sectional. Setting The Kids with CKD study involved five of eight paediatric nephrology units in Australia and New Zealand. Patients There were 375 children and adolescents (aged 6–18 years) with CKD, on dialysis or transplanted, recruited between 2013 and 2016. Main outcome measures Overall and domain-specific QoL were measured using the Health Utilities Index 3 score, with a scale from −0.36 (worse than dead) to 1 (perfect health). QoL scores were compared between CKD stages using the Mann-Whitney U test. Factors associated with changes in QoL were assessed using multivariable linear and ordinal logistic regression. Results QoL for those with CKD stages 1–2 (n=106, median 0.88, IQR 0.63–0.96) was higher than those on dialysis (n=43, median 0.67, IQR 0.39–0.91, p<0.001), and similar to those with kidney transplants (n=135, median 0.83, IQR 0.59–0.97, p=0.4) or CKD stages 3–5 (n=91, 0.85, IQR 0.60–0.98). Reductions were most frequent in the domains of cognition (50%), pain (42%) and emotion (40%). The risk factors associated with decrements in overall QoL were being on dialysis (decrement of 0.13, 95% CI 0.02 to 0.25, p=0.02), lower family income (decrement of 0.10, 95% CI 0.03 to 0.15, p=0.002) and short stature (decrement of 0.09, 95% CI 0.01 to 0.16, p=0.02). Conclusions The overall QoL and domains such as pain and emotion are substantially worse in children on dialysis compared with earlier stage CKD and those with kidney transplants.

Abdominal examination: Abdominal examination

The four short cases in the Clinical Examination give the candidate the opportunity to demonstrate the skills developed during basic training, including tailoring the clinical examination to difficult settings, such as a child of a difficult age, a bored child or a child who needs winning over quickly. The abdominal short case gives the candidate a chance to show their general approach to children and their families as much as their skill in detecting ascites.

Rapid national survey of renal stones in New Zealand infants.

Aim:  The aim of this study was to determine if there have been recent serious renal problems because of melamine among infants in New Zealand.