Publications by authors named "Andi Camden"

Article Synopsis
  • This study investigates the barriers to preventive health care, specifically well-child visits and immunizations, for children whose mothers have disabilities in Ontario, Canada.
  • Results show that children of mothers with intellectual or developmental disabilities are significantly less likely to receive recommended health care compared to children of mothers without disabilities.
  • The findings highlight the need for resources to improve access to preventive health care for these vulnerable populations, especially targeting those with intellectual or developmental disabilities.
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Individuals with disabilities may require specific medications in pregnancy. The prevalence and patterns of medication use, overall and for medications with known teratogenic risks, are largely unknown. This population-based cohort study in Ontario, Canada, 2004-2021, comprised all recognized pregnancies among individuals eligible for public drug plan coverage.

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Objectives: To quantify well-child visits by age 2 years and developmental screening at the 18-month enhanced well-child visit among children with prenatal opioid exposure (POE) and to identify factors associated with study outcomes.

Design: Population-based cohort study.

Setting: Ontario, Canada.

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Background: Pregnant patients with particular types of health insurance may have distinct demographic and medical characteristics that have a biologic effect on associations between opioid analgesics and congenital anomalies (CA).

Methods: We followed 199,884 pregnant prescription beneficiaries in Ontario, Canada (1996-2018). Opioid analgesics dispensed in the first trimester and CA were identified from universal-access administrative health records.

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Importance: Early identification of people who use opioids in pregnancy may improve health outcomes for pregnant people and infants. However, characterization of diverse circumstances surrounding type of opioid use and indications for opioid use are lacking.

Objective: To develop clinically distinct groups of people who use opioids in pregnancy and to evaluate their association with drug overdose or death up to 1 year post partum.

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Background: Recent data suggest an increased risk of congenital anomalies with prenatal exposure to opioid analgesics. We sought to further quantify the risk of anomalies after opioid analgesic exposure during the first trimester in a population-based cohort study.

Methods: Using administrative health data from Ontario, we followed 599 579 gestational parent-infant pairs from singleton pregnancies without opioid use disorder.

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Prenatal opioid use is increasingly common and can have adverse impacts on maternal and child health. In Ontario, there are no clear guidelines or universal programs to support the healthy development of children with prenatal opioid exposure. We present the epidemiology of prenatal opioid exposure in Ontario, summarize research examining child health outcomes with a focus on child development, review emerging guidelines for child health and developmental surveillance and highlight promising programs.

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Risk of postpartum opioid use disorder or overdose is low among women with prenatal opioid analgesic use.

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Background: It is unclear whether confounding accounts for the increased risk of preterm birth and small for gestational age (SGA) birth in opioid analgesic exposed pregnancies.

Methods: Using universal coverage health data for Ontario, we assembled a cohort of mother-infant pairs without opioid use disorder (627,172 pregnancies and 509,522 women). We estimated risk ratios (RRs) between opioid analgesics and preterm birth, SGA birth, and stillbirth; neonatal abstinence syndrome was a secondary outcome.

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This population-based cohort study assesses the prevalence of opioid use in pregnant women in Ontario, Canada, from 2014 through 2019.

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Background: Health administrative data offer a vital source of data on maternal prenatal opioid exposure (POE). The impact of different methods to estimate POE, especially combining maternal and newborn records, is not known.

Methods: This population-based cross-sectional study included 454 746 hospital births with linked administrative data in Ontario, Canada, in 2014-2017.

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Background: Despite rapid expansion of public bicycle share programs (PBSP), there are limited evaluations of the population-level impacts of these programs on cycling, leaving uncertainty as to whether these programs lead to net health gains at a population level or attract those that already cycle and are sufficiently physically active. Our objective was to determine whether the implementation of PBSPs increased population-level cycling in cities across the US and Canada.

Methods: We conducted repeat cross-sectional surveys with 23,901 residents in cities with newly implemented PBSPs (Chicago, New York), existing PBSPs (Boston, Montreal, Toronto) and no PBSPs (Detroit, Philadelphia, Vancouver) at three time points (Fall 2012, 2013, 2014).

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Objective: Assess the consumer nutrition environment in midsize to large supermarkets by supermarket type and area-level socioeconomic variables.

Design: Cross-sectional census of 257 supermarkets using the Toronto Nutrition Environment Measures Survey in Stores.

Setting: Toronto, Canada.

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Background: Few international studies examine public bicycle share programs (PBSP) health impacts. We describe the protocol for the International Bikeshare Impacts on Cycling and Collisions Study (IBICCS).

Methods: A quasi-experimental non-equivalent groups design was used.

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Objective: To perform a more sophisticated analysis of previously published data that advances the understanding of the efficacy of pedestrian countdown signal (PCS) installation on pedestrian-motor vehicle collisions (PMVCs), in the city of Toronto, Canada.

Methods: This is an updated analysis of the same dataset from Camden et al. A quasi-experimental design was used to evaluate the effect of PCS on PMVC.

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Background: Pedestrian incidents represent an increasing proportion of serious injuries resulting from motor vehicle collisions in Canada. However, few studies have examined the effect of pedestrian crossing location in urban areas on injury severity. The objective of this study was to investigate the relationship between pedestrian-motor vehicle collision injury severity and crossing location.

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Objective: To investigate the use of helmets for cyclists choosing to use BIXI bikes in comparison to personal bike riders in the City of Toronto.

Design: Cross-sectional study design.

Setting: Cyclists were observed in Toronto, Canada.

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Objective: To determine whether pedestrian countdown signals (PCS) reduce pedestrian-motor vehicle collisions in the city of Toronto, Canada.

Methods: A quasi-experimental study design was used to evaluate the effect of PCS on the number of pedestrian-motor vehicle collisions in the city of Toronto, from January 2000 to December 2009. Each intersection acted as its own control.

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