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Dive into the research topics where Charles A. Jennissen is active.

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Featured researches published by Charles A. Jennissen.


Injury Prevention | 2013

More fatal all-terrain vehicle crashes occur on the roadway than off: increased risk-taking characterises roadway fatalities

Gerene M. Denning; Karisa K. Harland; David G Ellis; Charles A. Jennissen

Background All-terrain vehicles (ATVs) have steadily increased in popularity, size and speed, characteristics that likely contribute to the alarming rise in ATV-related fatalities. One potentially high-risk activity is riding on the road. Objectives To compare fatal ATV crashes that occur on the roadway and off, to more fully understand factors that contribute to fatalities at each location. Methods Fatality data from the US Consumer Product Safety Commission (CPSC) were used for descriptive and comparative analyses. Multivariate logistic regression analysis was performed to determine relative risk. Results Over 60% of all fatalities (1985–2009) resulted from roadway crashes. After 1998, roadway fatalities increased at over twice the rate of off-road fatalities. Roadway crashes were more likely than off-road crashes to involve multiple fatalities, carrying passengers, alcohol use, collisions and head injuries. Roadway victims were less likely to be helmeted than off-road victims. Passengers and operators with passengers were also less likely to be helmeted than operators riding alone. Helmeted victims were half as likely to suffer a head injury. Conclusions Fatal roadway crashes were more likely than off-road crashes to involve risk-taking behaviours (eg, carrying passengers) that could exacerbate the inherent difficulty of operating ATVs on roadway surfaces. Higher crash forces from greater speed, and lower use of protective equipment, may also have contributed to higher roadway mortality rates. Eliminating non-essential ATV road use may be an effective way to reduce ATV-related fatalities. This will likely require a substantial investment in rider education and better enforcement of ATV road use restriction laws.


Traffic Injury Prevention | 2013

All-Terrain Vehicles (ATVs) on the Road: A Serious Traffic Safety and Public Health Concern

Gerene M. Denning; Charles A. Jennissen; Karisa K. Harland; D Ellis; Christopher T. Buresh

Objectives: On-road all-terrain vehicle (ATV) crashes are frequent occurrences that disproportionately impact rural communities. These crashes occur despite most states having laws restricting on-road ATV use. A number of overall risk factors for ATV-related injuries have been identified (e.g., lack of helmet, carrying passengers). However, few studies have determined the relative contribution of these and other factors to on-road crashes and injuries. The objective of our study was to determine whether there were differences between on- and off-road ATV crashes in their demographics and/or mechanisms and outcomes of injuries. Methods: Data were derived from our statewide ATV injury surveillance database (2002–2009). Crash location and crash and injury mechanisms were coded using a modification of the Department of Transportation (DOT) coding system. Descriptive analyses and statistical comparisons (chi-square test) of variables were performed. Multivariate logistic regression analysis was used to determine relative risk. Results: 976 records were included in the final analysis, with 38 percent of the injured individuals from on-road crashes. Demographics were similar for crashes at each location, with approximately 80 percent males, 30 percent under the age of 16, and 15 percent passengers. However, females and youths under 16 were over 4 times more likely to be passengers (P ≤ 0.0001), regardless of crash location. Compared to those off-road, on-road crash victims were approximately 10 times more likely to be involved in a vehicle–vehicle collision (P < 0.001), 3 times more likely to have a severe brain injury (P < 0.001), and twice as likely to have suffered major trauma (P < 0.001). Adult operators in on-road crashes were also twice as likely to test positive for alcohol as those off-road (P < 0.05). Helmet use significantly reduced the odds of sustaining a brain injury and on-road victims were only half as likely to be helmeted (P < 0.01). Conclusions: More than 1 in 3 on-road crashes involved a collision with another vehicle, suggesting that ATVs on the road represent a potential traffic safety concern. Of note, helmets were associated with reduced risk for the number and severity of brain injuries, providing further support for the importance of helmet use. Finally, even controlling for helmet use, on-road crash victims suffered more major trauma and severe brain injuries than those off-road. Overall, our data reinforce the importance of laws restricting ATV road use and the need for effective enforcement, as well as the need to increase user education about ATV road-use laws and the dangers of riding on the roads.


Pediatrics | 2014

Age-Based Risk Factors for Pediatric ATV-Related Fatalities

Gerene M. Denning; Karisa K. Harland; Charles A. Jennissen

OBJECTIVES: To compare and contrast characteristics and determinants of fatal all-terrain vehicle (ATV) crashes among pediatric age groups. METHODS: Retrospective descriptive and multivariable analyses of Consumer Product Safety Commission fatality data (1985–2009) were performed. RESULTS: Relative to 1985–1989 (baseline), pediatric deaths over the subsequent 4-year periods were lower until 2001–2004, when they markedly increased. Also, the proportion of vehicles involved in fatalities with engine sizes >350 cubic centimeter increased, reaching ∼50% of crashes in 2007–2009. Ninety-five percent of all pediatric fatalities were on adult-size vehicles. Victims <6 years old had the highest proportion of girls (24%) and passengers (76%), and the lowest helmet use (17%). More than half of 6- to 11-year-old children were vehicle operators; 1 in 4 were carrying passengers in their own age range. Over the study period, 12- to 15-year-old children accounted for more than half of all pediatric ATV-related fatalities. The proportion of youth riding on the road increased with age, as did the proportion of collisions with other vehicles. Older teens had the highest proportions of roadway fatalities (72%) and collision events (63%), and 19% of their crashes involved alcohol. Head injuries occurred in 63% of victims (the major determinant being roadway riding), and helmets reduced the likelihood of head injury among fatal crash victims by 58%. CONCLUSIONS: There were significant differences between pediatric age groups in the relative contribution of known risk factors for ATV-related fatalities. Future injury prevention efforts must recognize these differences and develop interventions based on the age range targeted.


Journal of Community Health | 2012

All-Terrain Vehicle Injury Prevention: Healthcare Providers’ Knowledge, Attitudes, and the Anticipatory Guidance They Provide

Charles A. Jennissen; Gerene M. Denning; Shane Sweat; Karisa K. Harland; Christopher T. Buresh

All-terrain vehicles (ATVs) continue to be an increasing cause of injuries and deaths in children, especially in rural communities. More children die in the United States each year from ATV-related events than from bicycle crashes. The purpose of this study was to determine the ATV anticipatory guidance practices of primary care providers, as well as their attitudes, knowledge, and the barriers faced in educating families about the risk of ATV use. An electronic survey was administered to primary care providers belonging to state medical societies. More than 60% of respondents (Total Nxa0= 218) believed that ATV anticipatory guidance was important to provide to pediatric patients and their families. However, 78% stated they provide ATV safety counseling less than 10% of the time during regular pediatric exams, and only 12% stated they do so greater than 25% of the time. Families rarely ask providers for advice on ATV safety issues; 84% of providers were asked once a year or less. ATV knowledge scores were low (median score 2 of 12); however, those with previous ATV exposure had significantly higher scores. Many respondents affirmed insufficient knowledge (47%) and inadequate resources (63%), but the most commonly identified barrier was that it was not a routine part of their practice. Providers in the study demonstrated limited knowledge, reported multiple barriers, and provided little or no ATV safety counseling. However, they consider ATV anticipatory guidance important for their patients. Armed with increased knowledge and appropriate resources, providers could play a significant role in promoting ATV safety.


Injury Prevention | 2014

Optimising seat design for all-terrain vehicle injury prevention: wide variability illustrates need for evidence-based standardisation

Charles A. Jennissen; Nathan S Miller; Kaiyang Tang; Gerene M. Denning

Background All-terrain vehicle (ATV)-related deaths and injuries are a growing public health concern, particularly in rural and suburban communities. More engineering approaches that address vehicle safety and promote injury prevention are critically needed. Objectives Our study was designed to determine the variability in seat characteristics among 2012 model-year, adult-size ATVs. Methods Measurements of 67 models were performed using an image-based method. Seat characteristics were compared by manufacturer and by ATV type (sport vs utility). Results There were significant differences in seat length and seat placement among manufacturers and between sport and utility ATVs. Seat lengths ranged from 19.8 to 37.0 inches, with sport models significantly longer than utility models. Longer seats resulted from the back of the seat extending further beyond the rear axle and/or the seat front extending closer to the handle grips. Seat front to handle grip distances ranged from 3.25 to 16.5 inches. Combined data showed a strong inverse correlation between seat length and the distance from the seat front to the handle grips, but no significant correlation with wheelbase or engine size. Conclusions We found wide variability in seat length and placement for adult-size ATVs. However, existing seat specifications were identified that may be a good starting point for improved seat design. Optimal design would allow for safe operation while reducing the likelihood of multiple riders and use by underaged operators, both major risk factors for ATV-related deaths and injuries. Ultimately, regulations may be needed to ensure standardised seat design is incorporated throughout the ATV industry.


Accident Analysis & Prevention | 2013

Off-highway vehicle parks: Combining environment, knowledge, and enforcement for all-terrain vehicle injury prevention

Gerene M. Denning; Charles A. Jennissen; Karisa K. Harland; D Ellis; Christopher T. Buresh

The number of off-highway vehicle (OHV) parks continues to grow to meet the recreational needs of ATV enthusiasts and the increasing popularity of the vehicle. Little is known about how OHV park regulations and enforcement affect ATV safety among their users. This study was designed to determine whether there were differences in crash mechanisms and/or compliance with ATV safety laws and regulations when comparing off-road ATV crashes inside and outside state OHV parks. Relative to outside the parks, a smaller percentage of park victims were under the age of sixteen, a lower percentage were passengers, and a dramatically higher percentage were helmeted. Mean injury severity scores were not different inside and outside the parks, but 5% of outside victims had severe brain injuries, as compared to no park victims. Overall, park victims exhibited better compliance with ATV safety laws and regulations and suffered less severe brain injury outcomes. However, park crashes involved more jump-related injuries, suggesting that additional approaches are needed to improve park safety. These findings support the hypothesis that riding environments with safety regulations and effective enforcement can promote safe behaviors and may prevent injuries.


Traffic Injury Prevention | 2016

All-terrain vehicle fatalities on paved roads, unpaved roads, and off-road: Evidence for informed roadway safety warnings and legislation.

Gerene M. Denning; Charles A. Jennissen

ABSTRACT Objective: All-terrain vehicles (ATVs) are designed for off-highway use only, and many of their features create increased risk with roadway travel. Over half of all ATV-related fatalities occur on roadways, and nonfatal roadway crashes result in more serious injuries than those off the road. A number of jurisdictions have passed or have considered legislation allowing ATVs on public roadways, sometimes limiting them to those unpaved, arguing that they are safe for ATVs. However, no studies have determined the epidemiology of ATV-related fatalities on different road surface types. The objective of the study was to compare ATV-related deaths on paved versus unpaved roads and to contrast them with off-road fatalities. Methods: Retrospective descriptive and multivariable analyses were performed using U.S. Consumer Product Safety Commission fatality data from 1982 through 2012. Results: After 1998, ATV-related deaths increased at twice the rate on paved versus unpaved roads. Still, 42% of all roadway deaths during the study period occurred on unpaved surfaces. States varied considerably, ranging from 18% to 79% of their ATV-related roadway deaths occurring on unpaved roads. Paved road crashes were more likely than those on unpaved surfaces to involve males, adolescents and younger adults, passengers, and collisions with other vehicles. Both the pattern of other vehicles involved in collisions and which vehicle hit the other were different for the 2 road types. Alcohol use was higher, helmet use was lower, and head injuries were more likely in paved versus unpaved roadway crashes. However, head injuries still occurred in 76% of fatalities on unpaved roads. Helmets were associated with lower proportions of head injuries among riders, regardless of road surface type. Relative to off-road crashes, both paved and unpaved roads were more likely to involve collisions with another vehicle. The vast majority of roadway crashes, however, did not involve a traffic collision on either paved or unpaved roads. Conclusions: Although differences were observed between paved and unpaved roads, our results show that riding on either represented significantly greater dangers than riding off the road. Many vehicle warnings specifically mention the risks of paved but not unpaved roads, yet we found 23 states with half or more of their roadway deaths on unpaved surfaces. Safety warnings should explicitly state the dangers of roadway riding regardless of surface type. These data further support laws/ordinances greatly restricting ATV riding on all types of public roadways.


Journal of Agromedicine | 2010

Unintentional Needlestick Injuries in Livestock Production: A Case Series and Review

Charles A. Jennissen; Jamie Wallace; Kelley J. Donham; David Rendell; Susan Brumby

ABSTRACT Livestock producers and their employees sometimes experience unintentional needlestick injury (NSI) while vaccinating or injecting medications into animals. There is little published regarding the medical complications that can develop from this occupational exposure. The objectives of this study were to (1) perform a retrospective review of animal-related NSIs treated at a tertiary medical center of a rural state; and (2) review the risks of NSI and measures to decrease their occurrence. Medical records of patients with NSI related to animal injection were identified from the University of Iowa Hospitals and Clinics database from 2002 to 2008 and reviewed. Nine patients received medical care for NSI that occurred while vaccinating farm animals. Most common NSI site was the nondominant hand and most occurred while attempting to inject the animal. Soft tissue infection was common and all nine received oral and/or intravenous antibiotics. Two thirds required hospital admission. Three required surgery and one had a bedside incision and drainage procedure. One patient had a serious inflammatory reaction with necrosis in the leg due to the oil adjuvant in the animal vaccine. Another case had a probable mycetoma with osteomyelitis and soft tissue infection due to the bacteria Streptomyces, which is a NSI complication not previously reported. Although medical complications from farm-related NSIs do not appear to be common, this case series illustrates how these injuries can be debilitating, costly, and lead to loss of work time and productivity. Producers and employees who inject livestock need to be aware of the risks and utilize measures to decrease unintentional NSI.


Injury Prevention | 2015

The Safety Tips for ATV Riders (STARs) programme: short-term impact of a school-based educational intervention.

Charles A. Jennissen; Jeffrey Peck; Kristel Wetjen; Pam Hoogerwerf; Karisa K. Harland; Gerene M. Denning

Background Since 1985, one-third of all US all-terrain vehicle (ATV)-related injuries and one-quarter of deaths involved victims <16u2005years of age. ATV safety education of youth could help reduce these tragedies. Objectives To assess the efficacy of the Safety Tips for ATV Riders (STARs) school-based programme targeting adolescents. Methods A survey was anonymously administered before and after the programme to determine demographics, knowledge and reported likelihood of using the information learned. Results Over 4600 students in 30 Iowa schools participated from November 2010 to April 2013. Initially, 52% knew most ATVs are designed for one rider, 25% knew the recommended vehicle size for their age range and 42% knew riding on Iowas roads was legal only for agricultural purposes. After the programme, this increased to 92%, 82% and 76%, respectively (p<0.0001 in each case), with 61% of students correct on all three. Better preintervention scores were associated with being males, higher riding frequency and being from isolated rural communities. After the programme, 48% and 32% said they were likely/very likely versus unlikely/very unlikely to use the safety information learned, respectively; younger students, females and infrequent riders reported higher likelihoods. Conclusions STARs increased short-term ATV safety knowledge and almost half the participants reported they would use the safety information presented. Males and frequent riders seemed more resistant, but some groups that may be more vulnerable to potential ATV crash and injury appeared amenable to the training with higher increases in postprogramme scores and greater intention of improving safety behaviours.


The Journal of Pain | 2011

Evidence-based pediatric pain management in emergency departments of a rural state.

Charmaine Kleiber; Charles A. Jennissen; Ann Marie McCarthy; Timothy N. Ansley

UNLABELLEDnEvidence-based pediatric pain management (EBPPM) has been identified as a practice too often overlooked in Emergency Departments (EDs). Studies show EBPPM is practiced inconsistently in urban EDs, and even less is known about the practice in rural EDs. The objectives of this study were: A) Determine the frequencies with which specific EBPPM practices are used in EDs of a primarily rural state; and B) Explore the differences in EBPPM practice in Critical Access, rural, and urban hospital EDs. A web-based survey, measuring the use of 14 EBPPM practices, was offered to all licensed independent providers (Medical Doctors, Doctors of Osteopathy, Physicians Assistants, and Advanced Registered Nurse Practitioners) and nurses from the 118 hospital EDs in a rural state. Responses from 259 providers and 1,177 nurses revealed that the majority of respondents infrequently used any type of topical analgesic before venipuncture or IV insertion in children, or oral sucrose for infant procedures. Tests for group differences show that providers from urban EDs more frequently used a topical analgesic for suturing lacerations, provided analgesics for blood draws, and gave pain medication to children with abdominal pain. Nurses from urban hospitals used significantly more EBPPM practices than nurses from Critical Access and rural hospitals (P < .001).nnnPERSPECTIVEnIn hospitals of all types, ED providers and nurses fail to take advantage of EBPPM practices. This study reveals that health professionals in rural settings are particularly in need of improving the use of recommended pediatric pain management practices.

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Gerene M. Denning

Roy J. and Lucille A. Carver College of Medicine

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Karisa K. Harland

Roy J. and Lucille A. Carver College of Medicine

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Christopher T. Buresh

Roy J. and Lucille A. Carver College of Medicine

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D Ellis

Roy J. and Lucille A. Carver College of Medicine

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