Shoulder belts in motor vehicle crashes: a statewide analysis of restraint efficacy

Click it or give it: Increased seat belt law enforcement and organ donation

Laws mandating that individuals wear a seat belt have the presumed goal of reducing motor vehicle accident fatalities, but the prevailing view is that they may reduce the number of organs available. I provide a conceptual model identifying mechanisms whereby the law could either increase or decrease organ donation. Exploiting variation across states and time in the adoption of primary seat belt enforcement, I investigate these mechanisms and estimate the effect of the law on the supply of organs. The law increases seat belt usage and decreases motor vehicle accident fatalities, which translates to a sizeable reduction in the number of motor vehicle accident-based organ donors. In contrast, the law is not associated with changes in the number of organ donors from nonmotor vehicle accident-based sources and is robust to controlling for hospital-specific effects. The effects are concentrated within organs expected to be most negatively impacted by the seat belt. Although primary enforcement represents a net-gain to society in terms of lives saved, the negative impact on organ donation suggests further emphasis be placed on policies aimed at increasing the availability of organs.

A comprehensive statewide analysis of seatbelt non-use with injury and hospital admissions: new data, old problem

OBJECTIVES

To investigate the association of seatbelt nonuse with injury patterns, injury severity, and in-patient hospital admission among adults presenting to emergency departments (EDs) in a statewide, population-based, sample of motor vehicle crashes.

METHODS

Using data from the 2002 Crash Outcome Data Evaluation System (CODES) for Wisconsin, 23,920 occupants of motor vehicle crashes, aged 16 years or older, who were treated in an ED, were analyzed. Logistic regression was used to compare the odds ratio of having sustained an injury to specific body regions and of being admitted to an inpatient unit in unbelted individuals compared with those who were belted.

RESULTS

Compared with belted occupants presenting to an ED, their unbelted counterparts were more likely to be male (56% vs. 40%) and to have used alcohol (17% vs. 4%). Unbelted occupants were younger (31 years vs. 38 years) and incurred higher ED charges ($681 vs. $509) than belted occupants. Additionally, unbelted occupants have a higher proportion of single-vehicle crashes, such as rollovers (44% vs. 22%), and rural crashes (56% vs. 44%). Unbelted occupants comprised 20% of study patients treated in the ED and discharged, 44% of patients treated in the ED and admitted, and 68% of patients dying in the ED. Unbelted occupants were more likely to be admitted (odds ratio [OR] = 2.6) than belted individuals and were more likely to suffer severe injuries to the head, face, thorax, abdomen, spine, upper and lower extremities (OR ranging from 1.6 to 3.9).

CONCLUSIONS

Among patients presenting to an ED after a motor vehicle crash, unbelted occupants are more likely to require inpatient admission and to have sustained a severe injury to numerous body regions than are belted occupants.