Mean Injury Rate Research Articles

Assessment of Germination and Seedling Development Factors of Soybean Cultivars in Different Salinity Levels

Salinity poses a significant abiotic stress factor that exerts detrimental effects on plant growth during germination and early seedling stages. The global prevalence of high salt concentration has transformed salinity into a serious problem, impacting vast expanses of land worldwide. This experiment aims to examine the effects of various concentrations of Sodium chloride (NaCl), including 200 mM, 150 mM, 50 mM, and 50 mM, on the seed development at early stage and germination of different cultivars of soybean to determine the variety with the highest value of tolerance, while exploring the underlying mechanisms responsible for salt tolerance in these plants. The parameters considered for measurement included relative injury rate, mean germination time, germination percentage, water uptake percentage, seedling height reduction, seedling biomass, and salt tolerance. Among these parameters, seedling height was highly affected with up to 72.58% reduction in 200 mM, followed by fresh weight and water uptake percentage. The parameters with minimum changes from 0 mM to 200 mM were mean germination time and relative injury rate. By assessing these parameters, a comprehensive understanding of the effects of salinity on soybean genotypes can be obtained. In conclusion, the study suggests that seedling traits are a reliable way to identify genotypes with increased tolerance to salinity stress by farmers according to the salinity situation in their soils.

A Prospective Multi-Institutional Evaluation of Iatrogenic Urethral Catheterization Injuries

Objectives To perform a multi-institutional investigation of incidence and outcomes of urethral trauma sustained during attempted catheterization. Patients & Methods A prospective, multi-center study was conducted over a designated 3-4 month period, incorporating seven academic hospitals across the UK and Ireland. Cases of urethral trauma arising from attempted catheterization were recorded. Variables included sites of injury, management strategies and short-term clinical outcomes. The catheterization injury rate was calculated based on the estimated total number of catheterizations occurring in each center per month. Anonymised data were collated, evaluated and described. Results Sixty-six urethral catheterization injuries were identified (7 centers; mean 3.43 months). The mean injury rate was 6.2 ± 3.8 per 1000 catheterizations (3.18–14.42/1000). All injured patients were male, mean age 76.1 ± 13.1 years. Urethral catheterization injuries occurred in multiple hospital/community settings, most commonly Emergency Departments (36%) and medical/surgical wards (30%). Urological intervention was required in 94.7% (54/57), with suprapubic catheterization required in 12.3% (n = 7). More than half of patients (55.56%) were discharged with an urethral catheter, fully or partially attributable to the urethral catheter injury. At least one further healthcare encounter on account of the injury was required for 90% of patients post-discharge. Conclusions This is the largest study of its kind and confirms that iatrogenic urethral trauma is a recurring medical error seen universally across institutions, healthcare systems and countries. In addition, urethral catheter injury results in significant patient morbidity with a substantial financial burden to healthcare services. Future innovation to improve the safety of urinary catheterization is warranted.

Agricultural Injury Surveillance Using a Regional Trauma Registry.

The burden of traumatic injury among workers in agriculture is substantial. Surveillance can inform injury prevention efforts to reduce farmworkers' risk. We posited that the regional trauma registry can provide surveillance for agricultural injury requiring trauma-center care. The Northeast Texas regional trauma registry was queried for patients injured in agricultural settings during 2016-2019 occurring in the 23,580 square mile study area subdivided into 219 US Census Zip Code Tract Area (ZCTA). Population at risk was estimated from the 2017 Census of Agriculture. Kuldorff's SaTScan identified case hot spots. A multivariable, geographically weighted regression model was fit for cases/1000 workers. In total, 273 cases occurred, (mean 68 cases per year [95% confidence interval 55.1-80.9]) among 96 ZCTA. The mean injury rate was 3.9 (95% confidence interval 3.4-4.3) cases per 1000 farmworkers. Animals and farm machinery were the most common injury mechanisms, 52.0% and 20.9%, respectively. Trauma ZCTA demonstrated more farms (median 170 versus 95.5, P<0.001), greater farm acreage (53,900 acres versus 32,800, P=0.004), and higher median total product sales ($6.5 million versus $3.9 million, P<0.001). Six hot spots were identified with relative risks from 2.85 to 5.31. The multivariable model of cases/1000 workers demonstrated significant associations with workers per ZCTA (a mean β-coefficient of 0.004 with P values <0.05 in 145 of 219 [66.5%] ZCTA) and percent rural population (β = -6.62, P values <0.05 in 76.1% of ZCTA). Regional trauma registry data, combined with census data and spatial analyses, can identify actionable geographic areas of high agriculture-related injury risk.

Likelihood of injury due to vasovagal syncope: a systematic review and meta-analysis.

Vasovagal syncope (VVS) is the most common type of syncope and is usually considered a benign disorder. The potential for injury is worrisome but the likelihood is unknown. We aimed to determine the proportion of patients injured due to VVS. A systematic search of studies published until August 2020 was performed in multiple medical and nursing databases. Included studies had data on the proportion of patients with injury due to VVS prior to study enrolment. Random effects methods were used. Twenty-three studies having 3593 patients met inclusion criteria. Patients were diagnosed clinically with VVS, and 82% had >2 syncopal episodes before enrolment. Tilt test was positive in 60% and 14 studies reported comorbidities (32.6% hypertensive). The weighted mean injury rate was 33.5% [95% confidence interval (CI): 27.3-40.5%]. The likelihood of injury correlated with population age (r = 0.4, P = 0.05), but not with sex, positive tilt test, or hypertension. The injury rates were 25.7% (95% CI: 19.1-32.8%) in studies with younger patients (mean age ≤50 years, n = 1803) and 43.4% (95% CI: 34.9-52.3%) in studies with older patients (P = 0.002). Nine studies reported major injuries; with a weighted mean rate of major injuries of 13.9% (95% CI: 9.5-19.8%). Injuries due to syncope are frequent, occurring in 33% of patients with VVS. The risk of major injuries is substantial. Older patients are at higher risk. Clinicians should be aware of the risk of injuries when providing care and advice to patients with VVS.

There is no ‘I’ in team: Career concerns, risk‐taking incentives, and team outcomes

AbstractThe National Basketball Association contracting rules provide plausibly exogenous variation in career concerns near contract end. We use this setting to study how individual career concerns affect risk‐taking behavior and can sabotage team performance. Using the frequency and duration of player injuries from 1991 to 2013 we measure individual risk‐taking behavior. We find that the average player's likelihood of missing a game due to injury falls by 0.06 percentage points (or over 100% relative to the mean injury rate) in the final 3 months of his contract, and when missing games due to injury is unavoidable, his recovery time drops by 22 days. However, “elite” players with virtually no career concerns actually miss more games due to injury. Finally, we find that elite players missing too many games and “average” players playing before healthy, combine to hurt team performance. For each additional player in the last 3 months on contract, the win probability for that team falls by over 2.6%.

Ten-year nationwide review of netball ankle and knee injuries in New Zealand

ObjectivesTo review netball ankle and knee injuries between 2008 and 2017. DesignAudit of insurance injury claims. MethodsData were divided into 5 equal year groups (2008/9, 2010/11, 2012/13, 2014/15, 2016/17), and 3 age groups (10 to 14 years, 15 to 19 years, 20 to 24 years old). Raw injury counts and injury rates per 1000 affiliated players were reported. Changes in injury rates over the 10-year period and differences between age groups were expressed as Incident rate ratios (IRRs). A Shewhart control chart was created to identify monthly injury patterns. Results10-14-year-olds showed the biggest increase in injury counts (ankle 84% increase and knee 133% increase). 20-24-year-olds had the highest mean injury rate over the ten-years (ankle = 77.8, knee = 71.6 injuries/1000 players). 10-14-year-olds had the biggest increase in risk of injury between 2008/09 to 2016/17, (ankle IRR = 2.0; knee IRR = 2.5), 15-19-year-olds (ankle IRR = 1.4; knee IRR = 1.5), 20-24 year olds (ankle IRR = 0.5; knee IRR = 1.9). The older two groups had a significantly higher mean risk of ankle and knee injury (IRR = 1.9 to 2.2; p < 0.001). Higher than expected yearly injury incidence was repeatedly seen in 10-19-year-olds. ConclusionAnkle and Knee injuries have increased with the biggest increase in 10-19-year-olds. Injuries in 20-24-year-olds still represent the highest cost and continue at a higher rate than in younger players. Spikes in injury are likely associated with intense periods of trialling and tournament play.

Fit to Dance Survey: Elements of Lifestyle and Injury Incidence in Chinese Dancers.

The Fit to Dance survey has been conducted using primarily Western participants and has provided foundation data for other studies. The purpose of the current study was to replicate the Fit to Dance 2 survey focusing on features of health and injuries in pre-professional and professional Chinese dancers of different genres. The survey was translated into Chinese with several new and modified questions. The survey was posted online for a 3-month period. A total of 1,040 individuals (82.8% female) completed the questionnaire, including 871 dance students (83.7%) and 169 professional dancers (16.3%), with focus in Chinese folk dance (44.4%), Chinese classical dance (25.6%), ballet (10.2%), and contemporary dance (9.8%). Compared to the Fit to Dance 2 survey, alcohol consumption (29% vs 82%; p<0.01) and smoking (13% vs 21%; p<0.05) were significantly less in Chinese dancers, but a higher percentage reported using weight-reducing eating plans (57% vs 23%; p<0.01) or having psychological issues with food (27% vs 24%; p<0.05). Reported injuries in a 12-month period prior to data collection were significantly lower in Chinese dancers (49% vs 80%; p<0.01). The type of injury (muscle and joint/ligament) and perceived cause of injury (fatigue, overwork, and reoccurrence of an old injury) were the same in both the current and previous survey. Mean injury rate ranged from 4.9 injuries/dancer (contemporary) to 3.4 injuries/dancer (Chinese folk dance), which is comparable to previously reported data on Western dance populations. This report provides the first comprehensive data on the health and injury incidence of Chinese dancers.

Injuries among volleyball players: a comprehensive survey of the literature

The purpose of this systematic review is to analyse and summarize current literature, to obtain an extensive overview, and improve the evidences concerning injury patterns in volleyball players. A comprehensive review of the literature was conducted. The main databases were accessed: PubMed, Medline, CINAHL, Cochrane, Embase and Google Scholar. Articles in English, French, Spanish, Italian, and German were considered for inclusion. We focused on the following outcomes of interest: injury place, type of injury, circumstance, injury severity. Missing data pertinent to these parameters warranted exclusion from this systematic review. We referred to the Newcastle–Ottawa Scale for the methodological quality assessment. A total of 28,889 patients were enrolled. The mean age was 22 years and the mean follow-up 24.9 months. There were seven retrospective cohort studies and 16 prospective cohort studies. The mean injury rate was 4.21/1000 playing hours. The methodological quality assessment resulted moderate. The lower limb was the most affected area, followed by the upper limb, trunk, and the head. Regarding lower limb, the most commonly injured area was the ankle, followed by the knee. Joint injuries were the most frequent, mostly represented by sprains and ligament damages. Spiking and blocking represented the most frequent circumstances correlated with these injuries. Acute onset lesions were more frequent than those caused by overuse. About a third of the injuries entailed a short-term absence from the field. Though volleyball is commonly considered to be a safe sport, the overall probability of sustaining an injury is comparable with previous reports from other high-contact team sports.

Sport injuries in international masters rowers: a cross-sectional study

MethodsA cross-sectional study was conducted among 743 masters rowers who participated in the 34th International Federation of Rowing Associations (Fédération Internationale des Sociétés d’Aviron, FISA) World Rowing Masters Regatta held in Zagreb, September 2-9, 2007. A rowing-specific questionnaire was used, followed by an interview about the injuries sustained during the 12-month period before the competition.ResultsThe mean injury rate per year was 0.48 injuries/masters rower (2.25 injuries/1000 training sessions/rower). The majority of injuries were chronic injuries (the ratio of acute to chronic injuries was 1:1.7), and did not lead to the loss of training/competition time. Of all acute injuries, 49.6% were acquired during rowing-specific training, 43.7% during cross-training, and 6.7% in the gym. The most commonly affected region was the low back (32.6%), followed by the knee (14.2%), shoulder/upper arm, and elbow (10.6% each).ConclusionInternational masters rowers sustained predominantly chronic injuries of low severity, and the most commonly injured region was the low back. The mean injury rate per rower per year was lower than the rates previously reported for juniors and seniors.

Delaware surf zone injuries and associated environmental conditions

Surf zone injury and environmental condition data were collected concurrently during the summer of 2014 along the Delaware coast. Documented injury data included injury type, gender, age and activity, while measured environmental conditions included local wave height, wave period and foreshore slope. Daily water user counts were used to normalize injury rates relative to the number of beachgoers at risk. There were 280 injuries over 116 sample days along the entire Delaware coast and 169 injuries over 82 sample days within the 5-beach focused study area where water user count data were available. Injuries were not distributed randomly as tested against a Poisson distribution and occurred in clusters with up to 15 injuries occurring in a single day. There were 32 serious injuries (cervical fractures, spinal cord injuries) and 1 fatality. Water user counts throughout the course of a day exceeded 25,000 on busy weekends such that the mean injury rate was 0.02 %. Men were twice as likely to be injured relative to women, and the mean injury age was 32 years old. Tourists were six times more likely to be injured compared to local beachgoers. Wading (44 %) was the dominant injury activity followed by body surfing (20 %) and body boarding (17 %). Direct correlation between injury occurrence or injury rate and any environmental factors was weak (highest squared correlation coefficient <0.12), but the highest injury rates were associated with moderate wave height (0.6 m) with lower injury rates for both smaller and larger waves. Lack of direct correlation between injury occurrence or injury rate and environmental parameters suggests there was an important (and as yet undetermined) human element that also dictates the injury rate. Additionally, the high proportion of injuries to tourists may require alternate strategies in local beach safety and injury awareness campaigns.

Acute and chronic injuries among senior international rowers: a cross-sectional study.

The aim of the study was to define the types of musculoskeletal injuries present in senior international rowers. According to the literature, no such study has been performed in this group. Injury data were obtained from a total of 634 rowers (33 % female, 67 % male) who completed a 12-month retrospective questionnaire on injury incidence while participating in the Senior World Rowing Championships in Munich, Germany, in 2007. The mean injury rate per one year was 0.92 injuries per rower (1.75 injuries per 1,000 training sessions per rower). The vast majority of self-reported injuries were chronic injuries (acute vs chronic ratio was 1:2.63), and the majority of reported injuries did not result in loss of time from training or competition. Of all acute injuries, 58.1 % were sustained during rowing-specific training, with 20.6 % injuries sustained in the gym and 21.3 % during cross-training. The most common site of injury was the low back followed by the knee and the chest/thoracic spine. Senior open weight rowers who sustained chronic injuries achieved significantly better final ranking at the 2007 Senior World Rowing Championships compared to the same group of rowers who did not sustain any injury. Senior international rowers participating in World Rowing Championships sustained predominantly chronic (overuse) injuries during the rowing season studied. Those were mainly low severity injuries, with the low back being the most frequently injured site. This study may will help in prevention and early diagnosis of eventual injuries in top-level rowers.

Tennis-Related Injuries Treated in United States Emergency Departments, 1990 to 2011

To analyze the patterns and causes of tennis-related injuries using, for the first time, a nationally representative data set. A retrospective cohort analysis was performed using the National Electronic Injury Surveillance System database. All tennis-related injuries treated in US emergency departments (EDs) from 1990 to 2011 were analyzed. During the study period, an estimated 492,002 (95% confidence interval, 364,668-619,336) individuals, aged 5 to 94 years, presented to US EDs for tennis-related injuries. Independent variables included patient age and gender, mechanism of injury, and location of injury event. Outcome variables included injury diagnosis, body region injured, disposition from ED, and involvement of the net. Most injuries were sustained by a nonspecific mechanism during play (37.9%) and occurred at a sport or recreation facility (83.4%). Children aged 5 to 18 years had a higher mean injury rate than adults older than 19 years. The most commonly injured body regions were the lower extremities (42.2%) and upper extremities (26.7%). Sprains or strains (44.1%) were the most common type of injury. The number of tennis-related injuries decreased by 41.4% during the years 1990 to 2011, and the tennis-related injury rates decreased by more than 45% during the study period. Among the 3.4% of patients who were admitted to the hospital, two-thirds (65.6%) involved patients 56 years of age or older. Despite the decrease in tennis-related injuries, the growing popularity of this sport warrants increased efforts to prevent injuries, especially among child and older adult participants.

Fatalities on Austrian Ski Slopes During a 5-year period

While the mean injury rate from snow sports in Austria is low (less than 2 injuries per 1000 skier days), there is little information about fatalities on Austrian ski slopes. The purpose of this study was to evaluate incidence and causes of fatalities among recreational skiers and snowboarders over a 5-season period on Austrian ski slopes. All traumatic and nontraumatic fatal ski accidents from the 2005-2006 through the 2009-2010 winter season were compiled by members of the Federal Ministry of the Interior. Data on age, gender, nationality, gear used, altitude, accident cause, primary cause of death, and helmet use were collected. The number of fatalities was related to a million skier days during this 5-year period. In total, 207 fatalities were registered during this time period. An overall incidence of 0.79 deaths per million skier days was calculated. Mean age was 50.9 ± 17.7 years. More than 85% of all fatalities occurred in males and 93.1% in skiers. Mean altitude was 1706.1 ± 517.7 m above sea level. In total, 52.7% were nontraumatic deaths, with the majority (73%) attributed to cardiac arrest. Regarding traumatic deaths, 41.2% died after a fall, 18.6% after collision with another skier, and 35.1% after an impact with a solid object. Head injury was the primary cause of death in 46.4% of traumatic deaths. Death is a rare event in recreational winter sports on Austrian ski slopes. Nevertheless, awareness of potential risk factors and common dangers may impact snow riders' behavior and help reduce the incidence of on-slope fatalities.

Influence of pinniped-caused injuries on the survival of adult Chinook salmon (Oncorhynchus tshawytscha) and steelhead trout (Oncorhynchus mykiss) in the Columbia River basin

Increasing pinniped abundance in the Pacific Northwest has coincided with population declines of Pacific salmon ( Oncorhynchus spp.) and steelhead trout ( Oncorhynchus mykiss ), and concentrated predation may affect the recovery of some threatened and endangered salmonid stocks. We used radiotelemetry to evaluate pinniped-caused injury effects on migration survival of 17 007 adult Columbia River Chinook salmon ( Oncorhynchus tshawytscha ) and steelhead trout. Injuries from pinnipeds were common (mean injury rate across 29 run-years = 36.5%) and were most common for spring Chinook salmon and steelhead trout. Injury was not consistently associated with adult survival to spawning tributaries, but some negative survival effects were detected. Pinniped-caused injury rates decreased as annual run sizes increased, indicating density-dependent or saturation effects. Within a run, large fish generally had a higher injury incidence than small fish, suggesting pinnipeds targeted large fish or more efficiently captured small fish. Seasonal, size-dependent, and density-dependent results imply that pinniped effects likely differ widely among salmonid populations within the Columbia River basin. A better understanding of these effects is needed to guide management and conservation strategies.

Controlled evaluation of injury in an international Safe Community: Kashmar, Iran

To determine the degree to which the Safe Community (SC) model is effective in reducing injuries. Although positive results have been reported for some communities in developed countries, there is no consistent relationship between being an international designated SC and subsequent changes in observed rate of injury, and no controlled studies have examined the effectiveness of the SC model in developing countries. The aim of this study was to evaluate and compare the injuries in the SC programme of Kashmar (population 149,358) with injuries in counties in Iran that have not applied the SC model. Retrospective study using available data from 20 March 2005 to 19 March 2008. Data were obtained from the Injury Prevention and Safety Promotion Department of the Disaster and Emergency Management Centre of the Ministry of Health and Medical Education of Iran. These data are collected upon presentation of injured patients to the emergency room. Different types of injuries are evaluated, including motor vehicle injuries (including pedestrians, passengers, drivers and motorcyclists), falls, blows by an object or a person, violence, burns, scorpion and snake bites, electrocution, animal attack, toxicity, suicide and other causes. A control group was selected from all counties in Iran with a population between 100,000 and 200,000. The mean injury rate of these counties was calculated, and counties which had an injury rate within one standard deviation (SD) of the mean rate for all 3 years of the study were included in the control group (n=44 counties). The mean population of the 44 control counties was 142,123 in 2006. The numbers of injuries per 100,000 population in Kashmar were 4654.6 [95% confidence interval (CI) 4584.3-4762.6], 4570.9 (95% CI 4465.5-4678.0) and 4949.2 (95% CI 4839.7-5060.4) in 2005-2006, 2006-2007 and 2007-2008, respectively. At the same time, the mean numbers of injuries per 100,000 population in the 44 control counties were 822.7 (95% CI 815.6-829.8), 1130.0 (95% CI 1121.7-1138.3) and 1245.5 (95% CI 1236.8-1254.2). The injury-related fatality rate in the emergency room was 57.6, 52.9 and 44.2 per 100,000 population in Kashmar and 12.2, 13.0 and 11.9 per 100,000 population in the control counties in the three study years. Although a comparison of the fatality rate between the first and third years of the study shows a decrease of 13.4 per 100,000 population in Kashmar, this was not significant (P=0.1056). In the 44 control counties, the injury-related fatality rate decreased by 0.3 per 100,000 population between the first and third years of the study. The difference between the decrease in injury-related fatality rate in Kashmar (13.4 per 100,000 population) and the 44 control counties (0.3 per 100,000 population) was significant (P<0.0001). The controlled evaluation of injury in the international SC of Kashmar showed an increase in the number and rate of injuries in Kashmar and in the 44 control counties over 3 years, but the injury-related fatality rate decreased over the same time period. A greater decrease was seen in Kashmar than in the control counties. Long-term evaluation is necessary to confirm these results.

Crashes involving motorised rickshaws in urban India: Characteristics and injury patterns

IntroductionMotorised three-wheeled vehicles (motorised rickshaw) are popular in Asian countries including India. This study aims to describe the crash characteristics and injury patterns for motorised rickshaw occupants and the road users hit-by-motorised rickshaw in urban India. MethodsConsecutive cases of road traffic crashes involving motorised rickshaw, irrespective of injury severity, whether alive or dead, presenting to the emergency departments of two large government hospitals and three branches of a private hospital in Hyderabad city were recruited. Crash characteristics, details of injuries, injury severity parameters and outcome were documented in detailed interviews. ResultsA total of 139 (18%) of the 781 participants recruited were injured as a motorised rickshaw occupant (11%) or were hit by a motorised rickshaw (7%) in 114 crashes involving motorised rickshaw. Amongst motorised rickshaw occupants, single-vehicle collisions (54%) were more frequent than multi-vehicle collisions (46%), with overturning of motorised rickshaw in 73% of the single-vehicle collisions. Mortality (12%), the mean Injury Severity Score (5.8) and rate of multiple injured (60%) indicated a substantial trauma load. No significant differences in injury pattern were found between motorised rickshaw occupants and hit-by-motorised rickshaw subjects, with the pattern being similar to that of the pedestrians and two-wheeled vehicle users. With bivariate analysis for motorised rickshaw occupants, the risk of fatal outcome (odds ratio (OR) 2.60, 95% confidence interval (CI): 0.64–10.54), upper limb injury (OR 2.25, 95% CI: 0.94–5.37) and multiple injuries (OR 2.03, 95% CI 0.85–4.83) was high, although not statistically significant in multi-motorised-vehicle collisions as compared with the single-vehicle collisions or overturning. The risk of having multiple injuries (OR 4.55, 95% CI: 1.15–17.95) was significantly higher in motorised rickshaw occupants involved in front collisions. Being a front-seat motorised rickshaw passenger in a vehicle collision increased the risk of having a fatal outcome (OR 7.37, 95% CI: 0.83–65.66) and a Glasgow coma score≤12 (OR 2.21, 95% CI: 0.49–9.89), although not significantly when compared to the back-seat passengers. ConclusionThese findings can assist with planning to deal with the consequences and prevention of road traffic injuries due to crashes involving motorised rickshaw, given the high use of these and substantial morbidity of related injuries in India. The need for improved understanding of the risk characteristics of motorised rickshaw is highlighted.

A 12-month prospective cohort study of injury in international rowers

ObjectiveIn this study, the injury incidence and association with type and volume of training in international rowers were described.DesignA prospective cohort design was used over a 12-month period.Patients20 international rowers...

Analysis of non-fatal and fatal injury rates for mine operator and contractor employees and the influence of work location

Introduction Mining injury surveillance data are used as the basis for assessing the severity of injuries among operator and contractor employees in the underground and surface mining of various minerals. Method Injury rates during 1983–2002 derived from Mine Safety and Health Administration (MSHA) database are analyzed using the negative binomial regression model. The logarithmic mean injury rate is expressed as a linear function of seven indicator variables representing Non-Coal Contractor, Metal Operator, Non Metal Operator, Stone Operator, Sand and Gravel Operator, Coal Contractor, and Work Location, and a continuous variable, RelYear, representing the relative year starting with 1983 as the base year. Results Based on the model, the mean injury rate declined at a 1.69% annual rate, and the mean injury rate for work on the surface is 52.53% lower compared to the rate for work in the underground. With reference to the Coal Operator mean injury rate: the Non-Coal Contractor rate is 30.34% lower, the Metal Operator rate is 27.18% lower, the Non-Metal Operator rate is 37.51% lower, the Stone Operator rate is 23.44% lower, the Sand and Gravel Operator rate is 16.45% lower, and the Coal Contractor rate is 1.41% lower. Fatality rates during the same 20 year period are analyzed similarly using Poisson regression model. Based on this model, the mean fatality rate declined at a 3.17% annual rate, and the rate for work on the surface is 64.3% lower compared to the rate for work in the underground. With reference to the Coal Operator mean fatality rate: the Non-Coal Contractor rate is 234.81% higher, the Metal Operator rate is 5.79% lower, the Non-Metal Operator rate is 47.36% lower, the Stone Operator rate is 8.29% higher, the Sand and Gravel Operator rate is 60.32% higher, and the Coal Contractor rate is 129.54% higher.

Effect of trail design and grooming on the incidence of injuries at alpine ski areas

Objectives: To identify the conditions at certain sites on slopes known as black spots for injury. Method: In the Hafjell and Voss alpine ski areas in Norway, 1410 skiing injuries...

Rates of pediatric injuries by 3-month intervals for children 0 to 3 years of age.

Rates of pediatric injuries by 3-month intervals for children 0 to 3 years of age.