Healthcare utilization and costs following non-fatal powdered and non-powdered firearm injuries for children and youth.

Little is known about the healthcare and economic burdens of non-fatal firearm injuries for children/youth beyond the initial admission. This study sought to estimate healthcare utilization and total direct healthcare costs of non-fatal powdered and non-powdered (air gun) firearm injuries 1-year post-injury. Using administrative data from 2003 to 2018 on all children/youth 0-24 years old in Ontario, Canada, a matched 1:2 cohort study was conducted to compare children/youth who experienced powdered and non-powdered firearm injuries with those who did not. Mean and median number of healthcare encounters and costs, and respective 95% confidence intervals (CIs) and interquartile ranges (IQRs), were estimated for both weapon type groups and controls and by intent. Children/youth who experienced a powdered and non-powdered firearm injury had a higher number of healthcare encounters and costs per year than those who did not. Mean 1-year costs for those with powdered and non-powdered firearm injuries were $8825 ($8007-$9643) and $2349 ($2118-$2578), respectively, versus $812 ($567-$1058) and $753 ($594-$911), respectively, for those without. Mean 1-year costs were highest for handgun injuries ($12,875 [95% CI $9941-$15,808]), and for intentional assault-related ($13,498 [$11,843-$15,153]; $3287 [$2213-$4362]), and intentional self-injuries ($14,773 [$6893-$22,652]; $6005 [$2193-$9817]) for both powdered and non-powdered firearm injuries, respectively.   Conclusion: Firearm injuries have substantial healthcare and economic burdens beyond the initial injury-related admission; this should be accounted for when examining the overall impact of firearm injuries. What is Known: • Child/youth firearm injuries have significant health and economic burdens. • However, existing work has mainly examined healthcare utilization and costs of initial admissions and/or have been limited to single-center studies and no studies have provide cost estimates by weapon type and intent. What is New: • Children/youth who suffered powdered firearm injuries had higher mean healthcare utilization and costs than those with non-powdered firearm injuries as well as comparable healthy children/youth. • Mean 1-year costs were highest for handgun injuries ($12,875), and for intentional assault-related ($13,498; $3287), and intentional self-injuries ($14,773; $6005) for powdered and non-powdered firearm injuries, respectively.

Dangerous "Toys": The Burden of Non-Powdered Firearm Injuries in Canadian Children and Youth.

Injuries in children and youth from non-powdered firearms are a significant public health concern in Canada and other high-income countries. Injury burden, healthcare utilization and costs related to non-powdered firearm use in Ontarians under 25 years of age were analyzed using ICES data. They demonstrate the need for effective policy interventions and awareness campaigns to improve the safety of these popular "toys."

Association of source country gender inequality with experiencing assault and poor mental health among young female immigrants to Ontario, Canada.

BACKGROUND: Gender inequality varies across countries and is associated with poor outcomes including violence against women and depression. Little is known about the relationship of source county gender inequality and poor health outcomes in female immigrants. METHODS: We used administrative databases to conduct a cohort study of 299,228 female immigrants ages 6-29 years becoming permanent residence in Ontario, Canada between 2003 and 2017 and followed up to March 31, 2020 for severe presentations of suffering assault, and selected mental health disorders (mood or anxiety, self-harm) as measured by hospital visits or death. Poisson regression examined the influence of source-country Gender Inequality Index (GII) quartile (Q) accounting for individual and country level characteristics. RESULTS: Immigrants from countries with the highest gender inequality (GII Q4) accounted for 40% of the sample, of whom 83% were from South Asia (SA) or Sub-Saharan Africa (SSA). The overall rate of assault was 10.9/10,000 person years (PY) while the rate of the poor mental health outcome was 77.5/10,000 PY. Both GII Q2 (Incident Rate Ratio (IRR): 1.48, 95% Confidence Interval (CI): 1.08, 2.01) and GII Q4 (IRR: 1.58, 95%CI: 1.08, 2.31) were significantly associated with experiencing assault but not with poor mental health. For females from countries with the highest gender inequality, there were significant regional differences in rates of assault, with SSA migrants experiencing high rates compared with those from SA. Relative to economic immigrants, refugees were at increased risk of sustaining assaults (IRR: 2.96, 95%CI: 2.32, 3.76) and poor mental health (IRR: 1.73, 95%CI: 1.50, 2.01). Higher educational attainment (bachelor's degree or higher) at immigration was protective (assaults IRR: 0.64, 95%CI: 0.51, 0.80; poor mental health IRR: 0.69, 95% CI: 0.60, 0.80). CONCLUSION: Source country gender inequality is not consistently associated with post-migration violence against women or severe depression, anxiety and self-harm in Ontario, Canada. Community-based research and intervention to address the documented socio-demographic disparities in outcomes of female immigrants is needed.

Implementation of a Physician Incentive Program for 18-Month Developmental Screening in Ontario, Canada.

OBJECTIVES: To evaluate factors associated with uptake of a financial incentive for developmental screening at an enhanced 18-month well-child visit (EWCV) in Ontario, Canada. STUDY DESIGN: Population-based cohort study using linked administrative data of children (17-24 months of age) eligible for EWCV between 2009 and 2017. Logistic regression modeled associations of EWCV receipt by provider and patient characteristics. RESULTS: Of 910 976 eligible children, 54.2% received EWCV (annually, 39.2%-61.2%). The odds of assessment were lower for socially vulnerable children, namely, those from the lowest vs highest neighborhood income quintile (aOR, 0.84; 95% CI, 0.83-0.85), those born to refugee vs nonimmigrant mothers (aOR, 0.90; 95% CI, 0.88-0.93), and to teenaged mothers (aOR, 0.70; 95% CI, 0.69-0.71)). Children were more likely to have had developmental screening if cared for by a pediatrician vs family physician (aOR, 1.28; 95% CI, 1.13-1.44), recently trained physician (aOR, 1.38; 95% CI, 1.29-1.48 for ≤5 years in practice vs ≥21 years) and less likely if the physician was male (aOR, 0.64; 95% CI, 0.61-0.66). For physicians eligible for a pay-for-performance immunization bonus, there was a positive association with screening. CONCLUSIONS: In the context of a universal healthcare system and a specific financial incentive, uptake of the developmental assessment increased over time but remains moderate. The implementation of similar interventions or incentives needs to account for physician factors and focus on socially vulnerable children to be effective.

Suicide and Self-Harm in Recent Immigrants in Ontario, Canada: A Population-Based Study.

OBJECTIVE: To estimate the rates of suicide and self-harm among recent immigrants and to determine which immigrant-specific risk factors are associated with these outcomes. METHODS: Population-based cohort study using linked health administrative data sets (2003 to 2017) in Ontario, Canada which included adults ≥18 years, living in Ontario (N = 9,055,079). The main exposure was immigrant status (long-term resident vs. recent immigrant). Immigrant-specific exposures included visa class and country of origin. Outcome measures were death by suicide or emergency department visit for self-harm. Cox proportional hazards estimated adjusted hazard ratios (aHRs) and 95% confidence intervals (CIs). RESULTS: We included 590,289 recent immigrants and 8,464,790 long-term residents. Suicide rates were lower among immigrants (n = 130 suicides, 3.3/100,000) than long-term residents (n = 6,354 suicides, 11.8/100,000) with aHR 0.3, 95% CI, 0.2 to 0.3. Male-female ratios in suicide rates were attenuated in immigrants. Refugees had 2.1 (95% CI, 1.3 to 3.6; rate 6.1/100,000) and 2.8 (95% CI, 2.5 to 3.2) times the likelihood of suicide and self-harm, respectively, compared with nonrefugee immigrants. Self-harm rate was lower among immigrants (n = 2,256 events, 4.4/10,000) than long-term residents (n = 68,039 events, 9.7/10,000 person-years; aHR 0.3; 95% CI, 0.3 to 0.3). Unlike long-term residents, where low income was associated with high suicide rates, income was not associated with suicide among immigrants and there was an attenuated income gradient for self-harm. Country of origin-specific analyses showed wide ranges in suicide rates (1.4 to 9.9/100,000) and self-harm (1.8 to 14.9/10,000). CONCLUSION: Recent immigrants have lower rates of suicide and self-harm and different sociodemographic predictors compared with long-term residents. Analysis of contextual factors including immigrant class, origin, and destination should be considered for all immigrant suicide risk assessment.

Periodic health visits by primary care practice model, a population-based study using health administrative data.

BACKGROUND: The general health check, which includes the periodic health visit and annual physical exam, is not recommended to maintain the health of asymptomatic adults with no risk factors. Different funding mechanisms for primary care may be associated with the provision of service delivery according to recommended guidelines. We sought to determine how use of the periodic health visit for healthy individuals without comorbidities, despite evidence against its use, differed by primary care model. METHODS: Population-based cross-sectional study using linked health and administrative datasets in Ontario, Canada, where most residents are insured for physician services through Ontario's single payer, provincially funded Ontario Health Insurance Plan. Participants included all living adults (> 19 years) in Ontario on January 1st, 2014, eligible for the Ontario Health Insurance Plan. Primary care enrollment model was the main exposure and included traditional fee-for-service, enhanced fee-for-service, capitation, team-based care, other (including salaried), and unenrolled. The main outcome measure was receipt of a periodic health visit during 2014. Age-sex standardized rates of periodic health visits performed during the one-year study period were analyzed by number of comorbid conditions. RESULTS: Of 10,712,804 adults in Ontario, 2,350,386 (21.9%) had a periodic health visit in 2014. The age-sex standardized rate was 6.1% (95% confidence interval [CI] 6.0, 6.1%) for healthy individuals. In the traditional fee-for-service model, the periodic health visit was performed for 55.3% (95% CI 54.4, 56.3%) of healthy individuals versus 10.2% (95% CI 10.0, 10.3%) in team-based care. Periodic health visit rates varied by primary care provider models. Traditional and enhanced fee-for-service models had higher rates across all comorbidity groups. CONCLUSIONS: Patients whose primary care physicians are funded exclusively through fee-for-service had the highest rates of periodic health visits in healthy individuals. Primary care reform initiatives must consider the influence of remuneration on providing evidence-based primary care.

Use of the emergency department as a first point of contact for mental health care by immigrant youth in Canada: a population-based study.

BACKGROUND: Emergency department visits as a first point of contact for people with mental illness may reflect poor access to timely outpatient mental health care. We sought to determine the extent to which immigrants use the emergency department as an entryway into mental health services. METHODS: We used linked health and demographic administrative data sets to design a population-based cohort study. We included youth (aged 10-24 yr) with an incident mental health emergency department visit from 2010 to 2014 in Ontario, Canada (n = 118 851). The main outcome measure was an emergency department visit for mental health reasons without prior mental health care from a physician on an outpatient basis. The main predictor of interest was immigrant status (refugee, non-refugee immigrant and non-immigrant). Immigrant-specific predictors included time since migration, and region and country of origin. We used Poisson models to estimate adjusted rate ratios (aRRs) and 95% confidence intervals (CIs). RESULTS: The cohort included 2194 (1.8%) refugee, 6680 (5.6%) non-refugee immigrant and 109 977 (92.5%) nonimmigrant youth. Rates of first mental health contact in the emergency department were higher among refugee (61.3%) and non-refugee immigrant youth (57.6%) than non-immigrant youth (51.3%) (refugee aRR 1.17, 95% CI 1.13-1.21; non-refugee immigrant aRR 1.10, 95% CI 1.08-1.13). Compared with non-refugee immigrants, refugees had a higher rate of first mental health contact in the emergency department (aRR 1.06, 95% CI 1.02-1.11). We also observed higher rates among recent versus longer-term immigrants (aRR 1.10, 95% CI 1.05-1.16) and immigrants from Central America (aRR 1.17, 95% CI 1.08-1.26) and Africa (aRR 1.15, 95% CI 1.06-1.24) versus from North America and Western Europe. INTERPRETATION: Immigrant youth are more likely to present with a first mental health crisis to the emergency department than non-immigrants, with variability by region of origin and time since migration. Immigrants may face barriers to access and use of outpatient mental health services from a physician. Efforts are needed to reduce stigma and identify mental health problems early, before crisis, among immigrant populations.

Unintentional injuries among refugee and immigrant children and youth in Ontario, Canada: a population-based cross-sectional study.

BACKGROUND: Unintentional injuries are a leading reason for seeking emergency care. Refugees face vulnerabilities that may contribute to injury risk. We aimed to compare the rates of unintentional injuries in immigrant children and youth by visa class and region of origin. METHODS: Population-based, cross-sectional study of children and youth (0-24 years) from immigrant families residing in Ontario, Canada, from 2011 to 2012. Multiple linked health and administrative databases were used to describe unintentional injuries by immigration visa class and region of origin. Poisson regression models estimated rate ratios for injuries. RESULTS: There were 6596.0 and 8122.3 emergency department visits per 100 000 non-refugee and refugee immigrants, respectively. Hospitalisation rates were 144.9 and 185.2 per 100 000 in each of these groups. The unintentional injury rate among refugees was 20% higher than among non-refugees (adjusted rate ratio (ARR) 1.20, 95% CI 1.16, 1.24). In both groups, rates were lowest among East and South Asians. Young age, male sex, and high income were associated with injury risk. Compared with non-refugees, refugees had higher rates of injury across most causes, including for motor vehicle injuries (ARR 1.51, 95% CI 1.40, 1.62), poisoning (ARR 1.40, 95% CI 1.26, 1.56) and suffocation (ARR 1.39, 95% CI 1.04, 1.84). INTERPRETATION: The observed 20% higher rate of unintentional injuries among refugees compared with non-refugees highlights an important opportunity for targeting population-based public health and safety interventions. Engaging refugee families shortly after arrival in active efforts for injury prevention may reduce social vulnerabilities and cultural risk factors for injury in this population.

The shrinking health advantage: unintentional injuries among children and youth from immigrant families.

BACKGROUND: Immigrants typically arrive in good health. This health benefit can decline as immigrants adopt behaviours similar to native-born populations. Risk of injury is low in immigrants but it is not known whether this changes with increasing time since migration. We sought to examine the association between duration of residence in Canada and risk of unintentional injury. METHODS: Population-based cross-sectional study of children and youth 0 to 24 years in Ontario, Canada (2011-2012), using linked health and administrative databases. The main exposure was duration of Canadian residence (recent: 0-5 years, intermediate: 6-10 years, long-term: >10 years). The main outcome measure was unintentional injuries. Cause-specific injury risk by duration of residence was also evaluated. Poisson regression models estimated rate ratios (RR) for injuries. RESULTS: 999951 immigrants were included with 24.2% recent and 26.4% intermediate immigrants. The annual crude injury rates per 100000 immigrants were 6831 emergency department visits, 151 hospitalizations, and 4 deaths. In adjusted models, recent immigrants had the lowest risk of injury and risk increased over time (RR 0.79; 95% CI 0.77, 0.81 recent immigrants, RR 0.90; 95% CI 0.88, 0.92 intermediate immigrants, versus long-term immigrants). Factors associated with injury included young age (0-4 years, RR 1.30; 95% CI 1.26, 1.34), male sex (RR 1.52; 95% CI 1.49, 1.55), and high income (RR 0.93; 95% CI 0.89, 0.96 quintile 1 versus 5). Longer duration of residence was associated with a higher risk of unintentional injuries for most causes except hot object/scald burns, machinery-related injuries, non-motor vehicle bicycle and pedestrian injuries. The risk of these latter injuries did not change significantly with increasing duration of residence in Canada. Risk of drowning was highest in recent immigrants. CONCLUSIONS: Risk of all-cause and most cause-specific unintentional injuries in immigrants rises with increasing time since migration. This indicates the need to develop strategies for maintaining the immigrant health advantage over time while balancing the desire to support integration, active living, and healthy child development.

Emergency Department Revisits by Urban Immigrant Children in Canada: A Population-Based Cohort Study.

OBJECTIVES: To examine the relationship between family immigrant status and unscheduled 7-day revisits to the emergency department (ED) and to test this relationship within subgroups of immigrants by visa class (family, economic, refugee), native tongue on landing in Canada, and region of origin. STUDY DESIGN: Population-based cohort study that used multiple linked health administrative and demographic datasets of landed immigrant and nonimmigrant children (<18 years) in urban Ontario who visited an ED and were discharged between April 2003 and March 2010. Logistic regression was used to model the odds of 7-day ED revisits with family immigrant status, with adjustment for patient and ED characteristics. RESULTS: Of 3,322,901 initial visits to the ED, 249,648 (7.5%) resulted in a 7-day revisit. There was no significant association of immigrant status with either ED revisits or poor revisit outcomes (greater acuity visit or need for admission) in the adjusted models. Within immigrants, the odds of revisit were not associated with immigrant classes or region of origin; however, immigrants whose native tongue was not English or French had a slightly greater odds of revisiting the ED (aOR 1.05; 95% CI 1.01, 1.09). Significant predictors of revisits included younger age, greater triage acuity score, greater predilection for using an ED, daytime shifts, and greater deprivation index. CONCLUSIONS: Immigrant children are not more likely to have short-term revisits to the ED, but there may be barriers to care related to language fluency that need to be addressed. These findings may be relevant for improving translation services in EDs.

Language ability and virtual mental healthcare utilisation among immigrant and refugee youth: a population-based cohort study.

BACKGROUND AND OBJECTIVES: The widespread adoption of virtual care during the pandemic may not have been uniform across populations, including among paediatric immigrants and refugees. We sought to examine the association between virtual mental healthcare utilisation and immigration factors. METHODS: This population-based cohort study of immigrants and refugees (3-17 years) used linked health administrative databases in Ontario, Canada (March 2020 to December 2021). Exposures included self-reported Canadian language ability (CLA) at arrival and immigration category (economic class, family class and refugee). The primary outcome was the visit modality (inperson/virtual) measured as a rate of physician-based mental healthcare visits. Modified Poisson regression model estimated adjusted rate ratios (aRRs) with 95% CIs. RESULTS: Among 22 420 immigrants, 12 135 (54%) did not have CLA (economic class: 6310, family class: 2207, refugees: 3618) and 10 285 did (economic class; 6293, family class: 1469, refugees: 2529). The cohort's mean age (SD) was 12.0 (4.0) years and half (50.3%) were female. Of 71 375 mental health visits, 47 989 (67.2%) were delivered virtually. Compared with economic class immigrants with CLA (referent), refugees with and without CLA had a lower risk of virtual care utilisation (CLA: aRR 0.89, 95% CI 0.86 to 0.93; non-CLA: aRR 0.80, 95% CI 0.77 to 0.83), as did family class immigrants with CLA (aRR 0.96, 95% CI 0.92 to 0.99). No differences in virtual care utilisation were observed among economic class immigrants with CLA and other immigrant groups. CONCLUSIONS: Language ability at arrival and immigration category are associated with virtual mental healthcare utilisation. Whether findings reflect user preference or inequities in accessibility, particularly for refugees and those without CLA at arrival, warrants further study.

Association between physician characteristics and practice-level uptake of paediatric virtual mental healthcare: a population-based study.

OBJECTIVE: To examine physician factors associated with practice-level uptake of virtual mental healthcare for children and adolescents. DESIGN, SETTING AND PARTICIPANTS: A population-based data linkage study of a cohort of all physicians (n=12 054) providing outpatient mental healthcare to children and adolescents (aged 3-17 years, n=303 185) in a single-payer provincial health system in Ontario, Canada from 1 July 2020 to 31 July 2021. EXPOSURES: Physician characteristics including gender, age, specialty, location of training, practice region, practice size and overall and mental health practice size. MAIN OUTCOMES: Practice-level proportion of outpatient virtual care provided: (1) mostly in-person (<25% virtual care), (2) hybrid (25%-99% virtual care) or (3) exclusively virtual (100% virtual care). Multinomial logistic regression models tested the association between practice-level virtual care provided and physician characteristics. RESULTS: Among physicians, 1589 (13.2%) provided mostly in-person mental healthcare with 8714 (67.8%) providing hybrid care, and 2291 (19.0%) providing exclusively virtual care. The provision of exclusive virtual care (vs mostly in-person) was associated with female sex (adjusted OR (aOR) 1.97, 95% CI 1.70 to 2.27 (ref: male)), foreign training (aOR 1.27, 95% CI 1.07 to 1.50 (ref: Canadian-trained)), family physicians (aOR 2.05, 95% CI 1.56 to 2.69 (ref: psychiatrist)) and reversely associated with large practice size (aOR 0.32, 95% CI 0.25 to 0.40 (ref smallest quintile)). Mostly in-person care was associated with older age physicians (71+ years) and practice outside the Toronto region. CONCLUSIONS AND RELEVANCE: In a single-payer universal healthcare system that remunerates physicians using the same fee structure for in-person and virtual outpatient care, there is heterogeneity in utilisation of virtual care that is associated with provider factors. This practice variation, with limited evidence on effectiveness and appropriate contexts for virtual care use, suggests there may be opportunity for further outcomes research and guidance on appropriate context for paediatric virtual mental healthcare delivery.

Mental Illness Following Physical Assault Among Children.

Importance: Physical assault during childhood is common and can lead to lasting mental health problems. Yet, there are few studies on the patterns of mental illness (ie, timing of onset, type, and acuity) in survivors of physical assault. Objective: To determine the risk of incident health record diagnoses of mental illness among children who experienced assault compared with children who did not. Design, Setting, and Participants: This population-based matched cohort study used linked health administrative data sets in Ontario, Canada. Children aged 0 to 13 years who experienced an incident physical assault between 2006 and 2014 were age-matched (1:4) to children who had not experienced assault and followed up for a minimum of 5 years. Data were analyzed from January 2020 to March 2022. Exposure: Physical assault resulting in hospitalization or an emergency department (ED) visit between the ages of 0 and 13 years. Main Outcomes and Measures: The primary outcome was incident health record diagnosis of mental illness measured as any physician or hospital mental health care use or completed suicide. Secondary outcome measures included the acuity of incident mental illness and mental illness diagnostic category. Cox proportional hazards regression analysis generated hazard ratios (HR) for incident mental illness. Results: A total of 21 948 children unexposed to assault and 5487 exposed to assault were included in the study with a mean (SD) age of 7.0 (4.6) years. There were more boys in the group that experienced assault (3006 individuals [54.8%]) compared with the group who did not (9909 individuals [45.1%]). Compared with children unexposed to assault, those exposed were more likely to be in the highest deprivation index quintile (standardized difference, 0.21) and live in rural areas (standardized difference, 0.48). Their mothers more often had active mental illness (standardized difference, 0.35). More than one-third of the exposed children had a health record diagnosis of mental illness (2219 children [38.6%]; incidence rate (IR), 53.3 per 1000 person-years) compared with 23.4% (5130 children; IR, 32.2 per 1000 person-years) of unexposed children, with an overall adjusted hazard ratio (aHR) of 1.96 (95% CI, 1.85-2.08). The greatest risk was observed in the first year following the assault (aHR, 3.08; 95% CI, 2.68-3.54). In both groups, nonpsychotic disorders were the most common type of mental illness. Initial mental illness diagnoses occurred in an acute care setting for 14.0% of exposed children (769 children) vs 2.8% of unexposed children (609 children). Conclusions and Relevance: In this population-based matched cohort study, children who experienced assault had, on average, a 2 times higher risk of receiving a mental illness diagnosis and were more likely than children who had not experienced assault to present to acute care for mental illness. Early intervention to support mental health of assaulted children is warranted, particularly in the first year following assault.

Health Care Use and System Costs Among Pediatric Refugees in Canada.

BACKGROUND: Resettled refugees land in Canada through 3 sponsorship models with similar health insurance and financial supports but differences in how resettlement is facilitated. We examined whether health system utilization, costs, and aggregate 1-year morbidity differed by resettlement model. METHODS: Population-based matched cohort study in Ontario, 2008 to 2018, including pediatric (0-17 years) resettled refugees and matched Ontario-born peers and categorized refugees by resettlement model: (1) private sponsorship (PSRs), (2) Blended Visa Office-Referred program (BVORs), and (3) government-assisted refugee (GAR). Primary outcomes were health system utilization and costs in year 1 in Canada. Multivariable logistic regression was used to test the associations between sponsorship model and major illnesses. RESULTS: We included 23 287 resettled refugees (13 360 GARs, 1544 BVORs, 8383 PSRs) and 93 148 matched Ontario-born. Primary care visits were highest among GARs and lowest in PSRs (median visits [interquartile range], GARs 4[2-6]; BVORs 3[2-5]; PSRs 3[2-5]; P <.001). Emergency department visits and hospitalizations were more common among GARs and BVORs versus PSRs (emergency department: GARs 19.2%; BVORs 23.4%; PSRs 13.8%; hospitalizations: GARs 2.5%; BVORs 3.2%; PSRs 1.1%, P <.001). Mean 1-year health system costs were highest among GARs (mean [standard deviation] $1278 [$7475]) and lowest among PSRs ($555 [$2799]; Ontario-born $851 [9226]). Compared with PSRs, GARs (adjusted odds ratio 1.63, 95% confidence interval 1.47-1.81) and BVORs (adjusted odds ratio 1.52, 95% confidence interval 1.26-1.84) were more likely to have major illnesses. CONCLUSIONS: Health care use and morbidity of PSRs suggests they are healthier and less costly than GARs and BVOR model refugees. Despite a greater intensity of health care utilization than Ontario-born, overall excess demand on the health system for all resettled refugee children is low.

Multicountry review: developmental surveillance, assessment and care by outpatient paediatricians.

BACKGROUND: Care of young children with neurodevelopmental disorders (NDD) is a major component of paediatric outpatient practice. However, cross-country practice reviews to date have been limited, and available data demonstrate missed opportunities for early identification, particularly in vulnerable population subgroups. METHODS: Multicountry review of national paediatric body guidance related to developmental surveillance, early identification and early childhood intervention together with review of outpatient paediatrician practices for developmental assessment of children aged 0-5 years with/at risk of NDDs. Review included five countries with comparable nationalised universal child healthcare systems (ie, Australia, Canada, New Zealand, Sweden and the UK). Data were collected using a combination of published and grey literature review, supplemented by additional local sources with descriptive review of relevant data points. RESULTS: Countries had broadly similar systems for early identification of young children with NDDs alongside universal child health surveillance. However, variation existed in national paediatric guidance, paediatric developmental training and practice, including variable roles of paediatricians in developmental surveillance at primary care level. Data on coverage of developmental surveillance, content and quality of paediatric development assessment practices were notably lacking. CONCLUSION: Paediatricians play an important role in ensuring equitable access to early identification and intervention for young children with/at risk of NDDs. However, strengthening paediatric outpatient care of children with NDD requires clearer guidance across contexts; training that is responsive to shifting roles within interdisciplinary models of developmental assessment and improved data to enhance equity and quality of developmental assessment for children with/at risk of NDDs.

Factors associated with experiencing reassault in Ontario, Canada: a population-based analysis.

BACKGROUND: Individuals who experience a violence-related injury are at high risk for subsequent assault. The extent to which characteristics of initial assault are associated with the risk and intensity of reassaults is not well described yet essential for planning preventive interventions. We sought to describe the incidence of reassault and associated risk factors in Ontario, Canada. METHODS: In this population-based retrospective cohort study using linked health and demographic administrative databases, we included all individuals discharged from an emergency department or hospitalised with a physical assault between 1 April 2005 and 30 November 2016 and followed them until 31 December 2016 for reassault. A sex-stratified Andersen-Gill recurrent events analysis modelled associations between sociodemographic and clinical risk factors and reassault. RESULTS: 271 522 individuals experienced assault (mean follow-up=6.4 years), 24 568 (9.0%) of whom were reassaulted within 1 year, 45 834 (16.9%) within 5 years and 52 623 (19.4%) within 10 years. 40 322 (21%) males and 12 662 (17%) females experienced reassault over the study period. Groups with increased rates of reassault included: those aged 13-17 years versus older adults (age 65+) (males: relative rate (RR) 2.16; 95% CI 1.96 to 2.38; females: RR 2.79; 95% CI 2.39 to 3.26)), those living in rural areas versus urban (males: RR 1.22; 95% CI 1.19 to 1.24; females: RR 1.32; 95% CI 1.27 to 1.37) and individuals with a history of incarceration versus without (males: RR 2.38; 95% CI 2.33 to 2.42; females: RR 2.57; 95% CI 2.48 to 2.67). CONCLUSION: One in five who are assaulted experience reassault. Those at greatest risk include youth, those living in rural areas, and those who have been incarcerated, with strongest associations among females. Timely interventions to reduce the risk of experiencing reassault must consider both sexes in these groups.

Utilization of Physician-Based Mental Health Care Services Among Children and Adolescents Before and During the COVID-19 Pandemic in Ontario, Canada.

IMPORTANCE: Public health measures to reduce the spread of COVID-19 have heightened distress among children and adolescents and contributed to a shift in delivery of mental health care services. OBJECTIVES: To measure and compare physician-based outpatient mental health care utilization before and during the COVID-19 pandemic and quantify the extent of uptake of virtual care delivery. DESIGN, SETTING, AND PARTICIPANTS: Population-based repeated cross-sectional study using linked health and administrative databases in Ontario, Canada. All individuals aged 3 to 17 years residing in Ontario from January 1, 2017, to February 28, 2021. EXPOSURES: Pre-COVID-19 period from January 1, 2017, to February 29, 2020, and post-COVID-19 onset from March 1, 2020, to February 28, 2021. MAIN OUTCOMES AND MEASURES: Physician-based outpatient weekly visit rates per 1000 population for mental health diagnoses overall and stratified by age group, sex, and mental health diagnostic grouping and proportion of virtual visits. Poisson generalized estimating equations were used to model 3-year pre-COVID-19 trends and forecast expected trends post-COVID-19 onset and estimate the change in visit rates before and after the onset of COVID-19. The weekly proportions of virtual visits were calculated. RESULTS: In a population of almost 2.5 million children and adolescents (48.7% female; mean [SD] age, 10.1 [4.3] years), the weekly rate of mental health outpatient visits was 6.9 per 1000 population. Following the pandemic onset, visit rates declined rapidly to below expected (adjusted relative rate [aRR], 0.81; 95% CI, 0.79-0.82) in April 2020 followed by a growth to above expected (aRR, 1.07; 95% CI, 1.04-1.09) by July 2020 and sustained at 10% to 15% above expected as of February 2021. Adolescent female individuals had the greatest increase in visit rates relative to expected by the end of the study (aRR, 1.26; 95% CI, 1.25-1.28). Virtual care accounted for 5.0 visits per 1000 population (72.5%) of mental health visits over the study period, with a peak of 5.3 visits per 1000 population (90.1%) (April 2020) and leveling off to approximately 70% in the latter months. CONCLUSIONS AND RELEVANCE: Physician-based outpatient mental health care in Ontario increased during the pandemic, accompanied by a large, rapid shift to virtual care. There was a disproportionate increase in use of mental health care services among adolescent female individuals. System-level planning to address the increasing capacity needs and to monitor quality of care with such large shifts is warranted.

Cerebral palsy and assisted conception.

Assisted reproductive technologies have been widely used over the past 30 years, and 1% to 4% of births worldwide are products of these technologies. However, adverse health outcomes related to assisted reproductive technologies, including cerebral palsy, have been reported. We extracted and reviewed all relevant studies cited by Medline from 1996 to 2010 evaluating the role of assisted reproductive technologies as a causative factor for cerebral palsy and poor long-term neurologic outcome. The research suggests that multiple pregnancy, preterm delivery, and babies small for gestational age are factors in the development of cerebral palsy. The vanishing embryo syndrome may also play a role. We review the evidence for these potentially causative factors, as well as their implications for embryo transfer policies.

Use of administrative record linkage to measure medical and social risk factors for early developmental vulnerability in Ontario, Canada.

BACKGROUND: Linkage of demographic, health, and developmental administrative data can enrich population-based surveillance and research on developmental and educational outcomes. Transparency of the record linkage process and results are required to assess potential biases. OBJECTIVES: To describe the approach used to link records of kindergarten children from the Early Development Instrument (EDI) in Ontario to health administrative data and test differences in characteristics of children by linkage status. We demonstrate how socio-demographic and medical risk factors amass in their contribution to early developmental vulnerability and test the concordance of health diagnoses in both the EDI and health datasets of linked records. METHODS: Children with records in the 2015 EDI cycle were deterministically linked to a population registry in Ontario, Canada. We compared sociodemographic and developmental vulnerability data between linked and unlinked records. Among linked records, we examined the contribution of medical and social risk factors obtained from health administrative data to developmental vulnerability identified in the EDI using descriptive analyses. RESULTS: Of 135,937 EDI records, 106,217 (78.1%) linked deterministically to a child in the Ontario health registry using birth date, sex, and postal code. The linked cohort was representative of children who completed the EDI in age, sex, rural residence, immigrant status, language, and special needs status. Linked data underestimated children living in the lowest neighbourhood income quintile (standardized difference [SD] 0.10) and with higher vulnerability in physical health and well-being (SD 0.11) , social competence (SD 0.10), and language and cognitive development (SD 0.12). Analysis of linked records showed developmental vulnerability is sometimes greater in children with social risk factors compared to those with medical risk factors. Common childhood conditions with records in health data were infrequently recorded in EDI records. CONCLUSIONS: Linkage of early developmental and health administrative data, in the absence of a single unique identifier, can be successful with few systematic biases introduced. Cross-sectoral linkages can highlight the relative contribution of medical and social risk factors to developmental vulnerability and poor school achievement.

Firearm injury epidemiology in children and youth in Ontario, Canada: a population-based study.

BACKGROUND AND OBJECTIVE: Despite firearms contributing to significant morbidity and mortality globally, firearm injury epidemiology is seldom described outside of the USA. We examined firearm injuries among youth in Canada, including weapon type, and intent. DESIGN: Population-based, pooled cross-sectional study using linked health administrative and demographic databases. SETTING: Ontario, Canada. PARTICIPANTS: All children and youth from birth to 24 years, residing in Ontario from 1 April 2003 to 31 March 2018. EXPOSURE: Firearm injury intent and weapon type using the International Classification of Disease-10 CM codes with Canadian enhancements. Secondary exposures were sociodemographics including age, sex, rurality and income. MAIN OUTCOMES: Any hospital or death record of a firearm injury with counts and rates of firearm injuries described overall and stratified by weapon type and injury intent. Multivariable Poisson regression stratified by injury intent was used to calculate rate ratios of firearm injuries by weapon type. RESULTS: Of 5486 children and youth with a firearm injury (annual rate: 8.8/100 000 population), 90.7% survived. Most injuries occurred in males (90.1%, 15.5/100 000 population). 62.3% (3416) of injuries were unintentional (5.5/100 000 population) of which 1.9% were deaths, whereas 26.5% (1452) were assault related (2.3/100 00 population) of which 18.7% were deaths. Self-injury accounted for 3.7% (204) of cases of which 72.0% were deaths. Across all intents, adjusted regression models showed males were at an increased risk of injury. Non-powdered firearms accounted for half (48.6%, 3.9/100 000 population) of all injuries. Compared with handguns, non-powdered firearms had a higher risk of causing unintentional injuries (adjusted rate ratio (aRR) 14.75, 95% CI 12.01 to 18.12) but not assault (aRR 0.84, 95% CI 0.70 to 1.00). CONCLUSIONS: Firearm injuries are a preventable public health problem among youth in Ontario, Canada. Unintentional injuries and those caused by non-powdered firearms were most common and assault and self-injury contributed to substantial firearm-related deaths and should be a focus of prevention efforts.