CGCatherine Gimbrone

Catherine Gimbrone

*This is an algorithmically generated author record based on publicly available information.

Current Organizations / Institutes

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Previous Organizations / Institutes

The organizations / institutes from the scholar's other articles in the past ten years


Catherine Gimbrone has a total of 32 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Internet Search Activity for Intentional Self-Harm Forums After a High-Profile News Publication: Interrupted Time Series Analysis

    by Nora Clancy Kelsall, Catherine Gimbrone, Mark Olfson, Madelyn Gould, Jeffrey Shaman, Katherine Keyes

    Searches for “pro-suicide” websites in the United States peaked during the week a high-profile news story was published and remained elevated for 6 months afterward, highlighting the need to avoid mentioning specific sources of explicit suicide instructions in media publications.

  • Florida’s Red Flag Gun Law and Firearm and Nonfirearm Homicide and Suicide Rates

    by Catherine Gimbrone, Kara E. Rudolph

    This study estimates the association between Florida’s red flag law enactment and firearm and nonfirearm homicide and suicide rates.


  • Open Access

    “Breaking the silence” suicide Prevention media campaign in Oregon: Evaluation of impact on help‐seeking and suicide mortality

    by Madelyn S. Gould, Alison M. Lake, Saba Chowdhury, Emily Noble, Katherine M. Keyes, Catherine Gimbrone, Thomas Niederkrotenthaler

    Introduction: Research has established that suicide‐related media can impact suicide rates both positively and negatively, supporting efforts to engage the media in the service of suicide prevention. The goal of the current study is to evaluate the impact of a suicide prevention media campaign implemented April 7–14, 2019 in Oregon.Methods: Several indices of help‐seeking behavior and suicide risk were employed: suicide‐related Google Health API searches, National Suicide Prevention Lifeline (Lifeline) (currently known as the 988 Suicide and Crisis Lifeline) call volume, and state suicide mortality data from April 7, 2016—May 6, 2019. Eight states with similar 2016–2018 average suicide rates were compared with Oregon. Bayesian structural time‐series modeling in R was used to test intervention effects.Results: During the 30 days following the start of the campaign, there was a significant increase in Lifeline calls from Oregon area codes (2488 observed vs. 2283 expected calls, p = 0.03). There were no significant changes in suicide mortality or suicide‐related Google searches in Oregon.Conclusions: The campaign appeared to increase help‐seeking behavior in the form of Lifeline calls, without any indication of an iatrogenic suicide contagion effect. However, the campaign's potential to reduce suicide mortality was unmet.


  • Open Access

    Sex-Specific Depressive Symptom Trajectories Among Adolescents in Los Angeles County, 2013 to 2017

    by Catherine Gimbrone, Samuel E. Packard, Megan C. Finsaas, Nadav L. Sprague, Ahuva Jacobowitz, Adam M. Leventhal, Andrew G. Rundle, Katherine M. Keyes


  • Open Access

    Association between pro-suicide website searches through Google and suicide death in the United States from 2010-2021. (Preprint)

    by Nora Clancy Kelsall, Catherine Gimbrone, Mark Olfson, Madelyn S. Gould, Jeffrey Shaman, Katherine Keyes

    Journal of Medical Internet Research - International Scientific Journal for Medical Research, Information and Communication on the Internet #Preprint #PeerReviewMe: Warning: This is a unreviewed preprint. Readers are warned that the document has not been peer-reviewed by expert/patient reviewers or an academic editor, may contain misleading claims, and is likely to undergo changes before final publication, if accepted, or may have been rejected/withdrawn. Readers with interest and expertise are encouraged to sign up as peer-reviewer, if the paper is within an open peer-review period. Please cite this preprint only for review purposes or for grant applications and CVs (if you are the author). Background: The rate of suicide death has been increasing, making understanding risk factors of growing importance. While exposure to explicit suicide-related media, such as description of means in news reports or sensationalized fictional portrayal, is known to increase population suicide rates, it is not known whether pro-suicide website forums, which often promote or facilitate information about fatal suicide means, are related to change in suicide deaths overall or by specific means. Objective: The present study aimed to estimate the association of the frequency of Google searches of known pro-suicide web forums and content with death by suicide over time in the US, by age, sex, and means of death. Methods: National monthly Google search data for names of common pro-suicide websites between January 2010 and December 2021 were extracted from Google Health Trends API. Suicide deaths were identified using the CDC National Vital Statistics System (NVSS), and three primary means of death were identified (poisoning, suffocation, and firearm). Distributed lag non-linear models (DLNMs) were then used to estimate the lagged association between the number of Google searches on suicide mortality, stratified by age, sex, and means, and adjusted for month. Sensitivity analyses, including using ARIMA modelling approaches, were also conducted. Results: Months in the US in which search rates for pro-suicide websites increased had more documented deaths by intentional poisoning and suffocation, among both adolescents and adults. For example, the risk of poisoning suicide among youth and young adults (age 10-24) was 1.79 (95% CI 1.06, 3.03) times higher in months with 22 searches per 10 million as compared to 0 searches. The risk of poisoning suicide among adults aged 25-64 was 1.10 (95% CI 1.03, 1.16) times higher one month after searches reached 9 per 10 million compared with zero searches. We also observed that increased search rates were associated with fewer youth suicide deaths by firearm with a three-month time lag for adolescents. These models were robust to sensitivity tests. Conclusions: Although more analysis is needed, the findings are suggestive of an association between increased pro-suicide website access and increased suicide deaths, specifically deaths by poisoning and suffocation. These findings emphasize the need to further investigate sites containing potentially dangerous information and their associations with deaths by suicide, as they may affect vulnerable individuals.


  • Open Access

    Association Between Prosuicide Website Searches Through Google and Suicide Death in the United States From 2010 to 2021: Lagged Time-Series Analysis (Preprint)

    by Nora Clancy Kelsall, Catherine Gimbrone, Mark Olfson, Madelyn S Gould, Jeffrey Shaman, Katherine Keyes

    BACKGROUND The rate of suicide death has been increasing, making understanding risk factors of growing importance. While exposure to explicit suicide-related media, such as description of means in news reports or sensationalized fictional portrayal, is known to increase population suicide rates, it is not known whether prosuicide website forums, which often promote or facilitate information about fatal suicide means, are related to change in suicide deaths overall or by specific means. OBJECTIVE This study aimed to estimate the association of the frequency of Google searches of known prosuicide web forums and content with death by suicide over time in the United States, by age, sex, and means of death. METHODS National monthly Google search data for names of common prosuicide websites between January 2010 and December 2021 were extracted from Google Health Trends API (application programming interface). Suicide deaths were identified using the CDC (Centers for Disease Control and Prevention) National Vital Statistics System (NVSS), and 3 primary means of death were identified (poisoning, suffocation, and firearm). Distributed lag nonlinear models (DLNMs) were then used to estimate the lagged association between the number of Google searches on suicide mortality, stratified by age, sex, and means, and adjusted for month. Sensitivity analyses, including using autoregressive integrated moving average (ARIMA) modeling approaches, were also conducted. RESULTS Months in the United States in which search rates for prosuicide websites increased had more documented deaths by intentional poisoning and suffocation among both adolescents and adults. For example, the risk of poisoning suicide among youth and young adults (age 10-24 years) was 1.79 (95% CI 1.06-3.03) times higher in months with 22 searches per 10 million as compared to 0 searches. The risk of poisoning suicide among adults aged 25-64 was 1.10 (95% CI 1.03-1.16) times higher 1 month after searches reached 9 per 10 million compared with 0 searches. We also observed that increased search rates were associated with fewer youth suicide deaths by firearms with a 3-month time lag for adolescents. These models were robust to sensitivity tests. CONCLUSIONS Although more analysis is needed, the findings are suggestive of an association between increased prosuicide website access and increased suicide deaths, specifically deaths by poisoning and suffocation. These findings emphasize the need to further investigate sites containing potentially dangerous information and their associations with deaths by suicide, as they may affect vulnerable individuals. CLINICALTRIAL

  • Open Access

    Internet Search Activity for Intentional Self-Harm Forums After a High-Profile News Publication: Interrupted Time Series Analysis (Preprint)

    by Nora Clancy Kelsall, Catherine Gimbrone, Mark Olfson, Madelyn Gould, Jeffrey Shaman, Katherine Keyes

    UNSTRUCTURED Searches for “pro-suicide” websites in the United States peaked during the week a high-profile news story was published and remained elevated for 6 months afterward, highlighting the need to avoid mentioning specific sources of explicit suicide instructions in media publications.

  • Racial Disparities in Spatial and Temporal Youth Suicide Clusters

    by Jonathan M. Platt, John R. Pamplin, Catherine Gimbrone, Caroline Rutherford, Sasikiran Kandula, Mark Olfson, Madelyn S. Gould, Gonzalo Martínez-Alés, Jeffrey Shaman, Katherine Keyes


  • Open Access

    Associations between COVID-19 mobility restrictions and economic, mental health, and suicide-related concerns in the US using cellular phone GPS and Google search volume data

    by Catherine Gimbrone, Caroline Rutherford, Sasikiran Kandula, Gonzalo Martínez-Alés, Jeffrey Shaman, Mark Olfson, Madelyn S. Gould, Sen Pei, Marta Galanti, Katherine M. Keyes

    During the COVID-19 pandemic, US populations have experienced elevated rates of financial and psychological distress that could lead to increases in suicide rates. Rapid ongoing mental health monitoring is critical for early intervention, especially in regions most affected by the pandemic, yet traditional surveillance data are available only after long lags. Novel information on real-time population isolation and concerns stemming from the pandemic’s social and economic impacts, via cellular mobility tracking and online search data, are potentially important interim surveillance resources. Using these measures, we employed transfer function model time-series analyses to estimate associations between daily mobility indicators (proportion of cellular devices completely at home and time spent at home) and Google Health Trends search volumes for terms pertaining to economic stress, mental health, and suicide during 2020 and 2021 both nationally and in New York City. During the first pandemic wave in early-spring 2020, over 50% of devices remained completely at home and searches for economic stressors exceeded 60,000 per 10 million. We found large concurrent associations across analyses between declining mobility and increasing searches for economic stressor terms (national proportion of devices at home: cross-correlation coefficient (CC) = 0.6 (p-value <0.001)). Nationally, we also found strong associations between declining mobility and increasing mental health and suicide-related searches (time at home: mood/anxiety CC = 0.53 (<0.001), social stressor CC = 0.51 (<0.001), suicide seeking CC = 0.37 (0.006)). Our findings suggest that pandemic-related isolation coincided with acute economic distress and may be a risk factor for poor mental health and suicidal behavior. These emergent relationships warrant ongoing attention and causal assessment given the potential for long-term psychological impact and suicide death. As US populations continue to face stress, Google search data can be used to identify possible warning signs from real-time changes in distributions of population thought patterns.