Residential mobility interacts at neighbourhood, family and individual levels in cumulative and compounding ways with significance for the wellbeing of children. High frequency residential change is potentially a useful marker for the clinical risk of behavioural and emotional problems. The evidence supports the reorientation of health services effectively to engage these residentially mobile children for whom health and psychological needs may be identified. The impact of housing and economic policies on childhood residential mobility should be evaluated considering this evidence.

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Aim Describe paediatricians' experience of adverse health outcomes for children during the New Zealand‐wide level 4 lockdown in response to the COVID‐19 pandemic. Methods Weekly national survey of paediatricians with an open‐ended questionnaire. Results During the 6‐week study survey period, the New Zealand Paediatric Surveillance Unit received 33 reports about 55 instances where paediatricians believed care may have been compromised, about half (56%) relating to infants aged from birth to 6 weeks. Compromised care was for acute presentations in 75%, acute complications of a chronic illness in 14%, with 11% for chronic conditions. Paediatricians reported the outcome as moderately severe (short‐term morbidity, increased length of stay, higher level of care) in 38 cases (69%) and in a further 4 (7%) as severe (potential to be life‐threatening or result in permanent disability). Conclusion Despite clear messaging, hospital avoidance and reduced access to primary and secondary care were associated with significant potential harm for children in New Zealand during a strict lockdown, with newborn infants disproportionately affected. During the implementation of interventions to eliminate community transmission of COVID‐19, New Zealand paediatricians note the importance of face‐to‐face post‐natal visits for newborns and primary care services for children with acute illness, to avoid preventable harm.

One half of cases in Auckland are acquired either from Pacific or locally. Similarities mean that disease acquired locally is likely of Pacific origin.

Pre-school dental caries is a significant public health problem and may be associated with the growth and nutritional status of children. This study aimed to investigate the association between body mass index (BMI) and early childhood caries (ECC) among pre-school children. Methods: This population-based retrospective study involves all 5-year-old children who resided in northern New Zealand and received school entry dental examinations between 1 January 2014 and 31 December 2015. ECC status was determined with the decayed missing filled teeth (dmft) score obtained from a routinely collected regional dental data set. Objectively measured BMI information was obtained from the 'Before School Check' (B4SC) Programme. Logistic regression analyses were used to assess the association between BMI and the occurrence of ECC (dmft score ≥ 1). Ethnic subgroup analyses were also conducted. Results: Of the 27 333 children involved in this analysis, 11 173 (40.9%) had ECC with a mean dmft score of 1.85, and 3948 (14.4%) were overweight and 2964 (10.8%) were obese at school entry. The prevalence of ECC was higher in overweight and obese children but in subgroup analyses by ethnicity, this positive association was observed in European children only (adjusted odds ratio for overweight children compared to normal weight children: 1.16; 95% CI: 1.02, 1.32 and adjusted odds ratio for obese children: 1.20; 95% CI: 1.00, 1.45). Conclusion: ECC is highly prevalent in New Zealand children and associated with higher BMI in children of European ethnicity.