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Objective: To determine the association between burns and hospitalization for mental health disorders up to three decades later., Summary Background Data: Burns are associated with pain, disability, and scarring, but the long-term impact on mental health is unclear., Methods: We analyzed a cohort of 23,726 burn patients aged ≥10 years who were matched to 223,626 controls from Quebec, Canada, between 1989 and 2022. The main exposure was admission for a burn. We followed patients during 3,642,206 person-years of follow-up to identify future hospitalizations for psychiatric disorders, substance use disorders, and suicide attempts. We estimated adjusted hazard ratios (HR) with 95% confidence intervals (CI) for the association between burns and subsequent mental health hospitalization using Cox proportional hazards regression., Results: Burn patients had 1.76 times greater risk of mental health hospitalization over time (95% CI 1.72-1.81), compared with controls. Associations were present regardless of burn site, but were greatest for burns covering ≥50% of the body (HR 3.29, 95% CI 2.61-4.15), third degree burns (HR 2.04, 95% CI 1.94-2.14), and burns requiring skin grafts (HR 2.00, 95% CI 1.90-2.10). Compared with controls, burn patients had more than two times the risk of hospitalization for eating disorders (HR 3.14, 95% CI 2.50-3.95), psychoactive substance use disorders (HR 2.27, 95% CI 2.17-2.39), and suicide attempts (HR 2.42, 95% CI 2.23-2.62). Risks were particularly elevated within 5 years of the burn, but persisted throughout follow-up., Conclusions: Burns are associated with an increased risk of hospitalization for mental health disorders up to 30 years later., Competing Interests: Conflicts of Interest and Source of Funding : GK-A has received a grant from the Quebec Network on Suicide, Mood Disorders and Related Disorders. NA has received a grant (#PJT-191702) from the Canadian Institutes of Health Research, and a grant (#296785) from the Fonds de recherche du Québec-Santé. For the remaining authors none were declared., (Copyright © 2024 The Author(s). Published by Wolters Kluwer Health, Inc.)

Background : Pregnancy-related risk factors for necrotizing fasciitis are poorly understood. We investigated pregnancy-related characteristics associated with the long-term risk of developing necrotizing fasciitis, a rare life-threatening infectious disease. Methods : We analyzed a longitudinal cohort of 1,344,996 parous women in Quebec, Canada between 1989 and 2020. The main exposure measures included complications of pregnancy such as gestational diabetes, preterm delivery, metabolic disorder, and other maternal characteristics. We followed the women over time to identify future hospitalizations for necrotizing fasciitis up to three decades after delivery. We estimated adjusted hazard ratios (HR) and 95% confidence intervals (CI) for the association of pregnancy characteristics with risk of necrotizing fasciitis in time-varying Cox proportional hazards regression models. Results : A total of 420 women were hospitalized for necrotizing fasciitis during follow-up, including 83 (19.8%) with diabetes-related necrotizing fasciitis. The incidence of necrotizing fasciitis was elevated for women with gestational diabetes (2.9 per 100,000 person-years), preterm delivery (3.2 per 100,000 person-years), and metabolic disorders (5.4 per 100,000 person-years), compared with no pregnancy complication (1.1 per 100,000 person-years). Compared with no pregnancy complication, gestational diabetes was associated with 1.87 times the risk (95% CI 1.38-2.53), preterm delivery with 2.10 times the risk (95% CI 1.65-2.66), and metabolic disorder with 3.72 times the risk (95% CI 2.92-4.74) of developing necrotizing fasciitis over time. Pregnancy complications were more strongly associated with the risk of necrotizing fasciitis 5 years or more after delivery. Conclusions : Complications of pregnancy may be associated with the long-term risk of necrotizing fasciitis in women., (Copyright ©2021, Yale Journal of Biology and Medicine.)

The extent to which child traffic injuries may be attributed to parents who use cannabis before driving is unknown. We investigated whether prenatal cannabis use disorders may predict future road traffic injuries in children. We conducted a cohort study of 792,082 children in Quebec, Canada with 6,280,663 years of follow-up between 2006 and 2019. The main exposure measure was maternal cannabis use disorder before or during pregnancy. The main outcome measure was future hospitalizations for transport-related injuries in children after birth. Using Cox proportional hazards regression models adjusted for potential confounders, we estimated hazard ratios and 95% confidence intervals (CI) for the association of prenatal cannabis use disorders with transport-related injuries in children. Maternal cannabis use disorders before birth were associated with 5.64 times the risk of hospitalization for future motor vehicle crash injuries in children (95% CI 2.61-12.21). The risk increased with the child's age. Prenatal cocaine, opioid, and other drug use disorders were not associated with pediatric transport-related injuries. Maternal cannabis use disorders before birth may be an early predictor of childhood injuries from motor vehicle crashes., (Copyright © 2021 Elsevier Inc. All rights reserved.)

The extent to which socioeconomic status was associated with life expectancy in the 19 th and early part of the twentieth century is poorly understood. We sought to determine the association between a deceased individual's tombstone size, a potential marker of socioeconomic status, and their age of death in the late modern period. We conducted a cross-sectional study of 276 deceased individuals buried between 1820 and 1992 in a large cemetery in Quebec, Canada. The main outcome measure was age of death. We used generalized linear models adjusted for sex, marital status, and year of death to determine whether tombstone height and volume were associated with a greater number of years lived. Tombstone height and volume were associated with an older age of death in adjusted regression models. Individuals with tall tombstones lived 9.6 years longer than those with short tombstones (95% confidence interval, CI 3.9 to 15.4). Individuals with large volume tombstones lived 6.2 years longer than those with small tombstones (95% CI 1.7 to 10.8). Our findings indicate that in the 1800s and early 1900s, tombstone size was strongly associated with age of death. A possible explanation for this occurrence is that wealthy individuals, capable of purchasing more sizeable tombstones, were more likely to live a longer and healthier life., (© 2021. Springer Nature B.V.)