Related Experiment Video
Updated: Jul 15, 2026

Hemodynamic Precision in the Neonatal Intensive Care Unit using Targeted Neonatal Echocardiography
Published on: January 27, 2023
Evaluation of the United States' Permitless Concealed Carry Laws and Child Health in the ECHO Cohort
Marie L ChurchilL1, Emily A Knapp2, Alexander D Mccourt3
1A senior biostatistician at Johns Hopkins Bloomberg School of Public Health, Baltimore, United States.
Abstract:
Firearms are the leading cause of death among children in the United States (US). As of 2023, half of US states had enacted laws allowing permitless concealed carry of firearms. Our cross-sectional study evaluated the association between permitless concealed carry laws and child general health using data from the nationwide Environmental influences on Child Health Outcomes (ECHO) Cohort collected between 2003 and 2023. Children aged 1-21 years with caregiver- or self-reported general health status were included. Secondary outcomes included child internalizing and externalizing behaviors and child stress. Regression models estimated the association of exposure to state-level permitless concealed carry laws six months prior to each outcome, adjusted for individual- and area-level covariates. One-fifth (20.9%) of the sample (n = 11,325) lived in states allowing permitless concealed carry of a handgun. Children living in these states were 25% less likely (OR: 0.75, 95% CI: 0.60, 0.95) to report excellent/very good general health and had psychological stress scores 0.21 standard deviations higher (β = 0.21, 95% CI: 0.10, 0.31) than children in other states. There was no statistically significant association with internalizing or externalizing behavior scores. Our study found that children living in states that allow permitless concealed carry of firearms had worse general health and higher stress, suggesting the need for policy changes to address gun violence as a public health and human rights crisis.
Related Concept Videos
Imaging Studies for Cardiovascular System I:Echocardiography
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...
Imaging Studies for Cardiovascular System II:Types of Echocardiography
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
Imaging Studies for Cardiovascular System III: X-Ray
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Assessment of the Cardiovascular System IV: Auscultation
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
Assessment of apical pulse
Assessing the apical pulse is a critical nursing procedure, particularly indicated for:
