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At least 19 recordsLinked to original sources

PubMed1999

Results of physical inspection before races and race-related characteristics and their association with musculoskeletal injuries in Thoroughbreds during races.

OBJECTIVE: To estimate the relative risk of injury among horses deemed to be at increased risk of injury on the basis of prerace physical inspection findings and to examine the association of injury during races with race-related characteristics. DESIGN: Cohort study. ANIMALS: 2,187 Thoroughbred horses that started 3,227 races in Kentucky. PROCEDURE: All race starts for which a horse was deemed to be at increased risk of injury on the basis of prerace physical inspection findings and a random sample of race starts for which horses were not deemed at increased risk of injury were included in the study. Findings of prerace physical inspection, race-related characteristics, and outcome of the race (race results and whether the horse incurred an injury) were recorded for each race start. Race starts in which a horse incurred an injury during a race were compared with race starts in which injuries were not incurred to identify factors associated with injury during races. RESULTS: Abnormality of the suspensory ligament of the forelimbs detected during prerace physical inspection, racetrack, class of race (claiming race < or = $25,000 vs other classes), and distance of race (< 7 furlongs vs other distances) were significantly associated with increased risk of injury. CONCLUSIONS AND CLINICAL RELEVANCE: Prerace physical inspection findings, particularly abnormalities of the suspensory ligament, may be used to identify horses at increased risk of injury during races. Rate of injury differed among racetracks, and horses in certain types of races (lower-priced claiming races and races of shorter distance) may be at increased risk of injury during races.

Age Factors↗

PubMed2005

Attractiveness of own-race, other-race, and mixed-race faces.

Averaged face composites, which represent the central tendency of a familiar population of faces, are attractive. If this prototypicality contributes to their appeal, then averaged composites should be more attractive when their component faces come from a familiar, own-race population than when they come from a less familiar, other-race population. We compared the attractiveness of own-race composites, other-race composites, and mixed-race composites (where the component faces were from both races). In experiment 1, Caucasian participants rated own-race composites as more attractive than other-race composites, but only for male faces. However, mixed-race (Caucasian/Japanese) composites were significantly more attractive than own-race composites, particularly for the opposite sex. In experiment 2, Caucasian and Japanese participants living in Australia and Japan, respectively, selected the most attractive face from a continuum with exaggerated Caucasian characteristics at one end and exaggerated Japanese characteristics at the other, with intervening images including a Caucasian averaged composite, a mixed-race averaged composite, and a Japanese averaged composite. The most attractive face was, again, a mixed-race composite, for both Caucasian and Japanese participants. In experiment 3, Caucasian participants rated individual Eurasian faces as significantly more attractive than either Caucasian or Asian faces. Similar results were obtained with composites. Eurasian faces and composites were also rated as healthier than Caucasian or Asian faces and composites, respectively. These results suggest that signs of health may be more important than prototypicality in making average faces attractive.

Asian People↗

PubMed2004

Identification of own-race and other-race faces: implications for the representation of race in face space.

Own-race faces are recognized more easily than faces of a different, unfamiliar race. According to the multidimensional space (MDS) framework, the poor discriminability of other-race faces is due to their being more densely clustered in face space than own-race faces. Multidimensional scaling analyses of similarity ratings (Caucasian participants, n = 22) showed that other-race (Chinese) faces are more densely clustered in face space. We applied a formal model to test whether the spatial location of face stimuli could account for identification accuracy of another group of Caucasian participants (n = 30). As expected, own-race (Caucasian) faces were identified more accurately (higher hit rate, lower false alarms, and higher A') than other-race faces, which were more densely clustered than own-race faces. A quantitative model successfully predicted identification performance from the spatial locations of the stimuli. The results are discussed in relation to the standard MDS account of race effects and also an alternative "race-feature" hypothesis.

Adult↗

PubMed2002

Contact zones between chromosomal races of Mus musculus domesticus. 3. Molecular and chromosomal evidence of restricted gene flow between the CD race (2n = 22) and the ACR race (2n = 24).

The contact zone between the Ancarano (ACR; 2n = 24) and Cittaducale (CD; 2n = 22) races of Mus musculus domesticus was studied. We used chromosomes and mitochondrial DNA (mtDNA) sequences of the control region as genetic markers to detect introgression between races. In total, 76 mice were trapped at 17 localities. Cytogenetic analysis was performed on 73 mice. A segment of the control region (468 bp) was sequenced in 41 specimens. The two races are distributed parapatrically and the contact zone was identified inside a village (Pizzoli). No mixed population was found in the study area. The contact zone does not correspond to any geographical or ecological barrier but is located in a zone of potentially high density of mice. The sequence analysis clearly demonstrates genetic differentiation between races (1.4% of sequence divergence). Hybridization is rare. Evidence of introgression was found in two individuals in the contact zone: one individual of the ACR race carries a metacentric belonging to the CD race, while another ACR individual carries a CD-like haplotype. In these ecological conditions, the observed distribution pattern and the very low level of hybridization suggest the presence of a premating mechanism of reproductive isolation.

Animals↗

PubMedDate not supplied

The role of reported primary race on health measures for multiple race respondents in the National Health Interview Survey.

OBJECTIVES: As data for multiple race groups have only recently been collected and tabulated, the current understanding of the health of multiple race groups is not well developed. In the National Health Interview Survey (NHIS), survey respondents who report more than one race are asked to identify a primary race. This report compares selected health and demographic measures by the response to the primary race question and compares estimates for specific primary race groups to corresponding estimates for single race groups. METHODS: Using 1997-2003 NHIS data, several demographic and health measures were compared by reported primary race within the four largest multiple race groups. Then estimates by primary race for these four multiple race groups were compared to those for their single race counterparts. RESULTS: There were few statistically significant associations between reported primary race and health or demographic variables within the four multiple race groups. This lack of association may be due to the small number of multiple race respondents (which results in large standard errors) rather than similarity of point estimates among the subgroups. A greater number of differences between estimates for single race groups and for multiple race respondents who reported the same single race as their primary race were identified. CONCLUSIONS: The apparent lack of association between primary race within a multiple race group and health outcomes suggests that tabulating multiple race responses by primary race is unnecessary for valid health estimates for multiple race groups, at least with available statistical power. However, differences between single race and primary race estimates within a multiple race group suggest that inferences for multiple race respondents using single race estimates may be imprecise for some outcomes.

Adolescent↗

PubMed1986

Career profile of the Canadian Standardbred. II. Influence of age, gait and sex upon number of races, money won and race times.

The objective of the study was to examine the career profile of the average racehorse in order to establish normal values for performance. Records of race performance for a population of 762 horses randomly-selected from the 1972 registrations of the Canadian Standardbred Horse Society were summarized to provide annual statistics for number of races, money won, and times for the mile (race times) over the period 1974 to 1983 inclusive. Results were analyzed to determine the influence of sex, gait, age, and year of the first race. The transformation log (1 + X) was used to achieve normality where necessary. The 95% confidence interval for the mean (mean range) for career total for number of races was 21.8 to 69.6. Of the horses which raced, 30% raced 20 or fewer times, 29% raced more than 100 times. Females raced significantly less often than either males or geldings (p less than 0.001), pacers significantly more often than trotters (p less than 0.01). Regardless of the age at which they first competed all horses were raced lightly in their first race year. Mean range for career total for money won was $2,212 to $2,798 (n = 507). Of 507 horses which raced, 65.8% earned less than $10,000, 6.3% more than $50,000. Trotting geldings had the highest mean money won, mean range $2,448 to $38,105. Mean range for money won per race for all horses racing was $67.77 to $74.51. Overall, 58% of horses earned less than $100 per race, 4.5% over $500. Only 4.5% of horses racing met their immediate training expenses. Increase in age at first race was associated with highly significant and progressive reductions in career races, money won, and money won per race. Of 507 horses which raced, 409 or 80% won at least one race and thus acquired an official winning time or mark. Population mean for career mark was 2.126 min (2.07.3.). Population trend in mean mark was for progressive improvement over the ten year racing period amounting to 0.0968 min or 5.81 s. The average horse achieved its best winning time 2.55 years after starting racing, at a mean age of 5.27 years. The results suggest that the best nonwinning time may be a better indicator of potential than the best winning time. For the average as opposed to the superlative horse, number of races appears to be of greater importance than speed.(ABSTRACT TRUNCATED AT 400 WORDS)

Age Factors↗

PubMed1999

A longitudinal study of racing thoroughbreds: performance during the first years of racing.

OBJECTIVES: To develop a profile of the racing careers of Thoroughbred horses in south-eastern Queensland, and to examine factors that affect racing during the first years of racing. DESIGN AND PROCEDURE: A longitudinal study using the racing records of a defined cohort of Thoroughbred horses that were born on or within 12 months following 1 August 1991. Data collection commenced in 1996 and will continue until all horses cease racing. In this paper two measures of performance were examined: race earnings during the first year of racing and cumulative proportion of horses still racing up to 2 years after their first start. Univariable and multivariable methods were used to describe and identify factors associated with the performance of these horses. RESULTS: By 31 July 1997, 1804 horses were enrolled in the study including 916, 701, 152 and 35 horses that first raced at 2, 3, 4 and 5 years of age, respectively. During their first year of racing, half the horses earned no more than A$450 from race earnings, and 710 (39.4%) horses earned no money at all. In comparison to poorly performing horses, well-performing horses were more likely to be male, to have started as 2-year-olds and to have had more starts during this year. Of the horses that first started as 2 and 3-year-olds, only 71 and 46% continued racing for at least 1 and 2 years after their first start, respectively. Length of racing life was associated with performance during the first year of racing (number of starts and average earnings per race), and with sex, date of birth and age at first start. CONCLUSIONS: The study confirmed a high wastage among racing Thoroughbreds. As expected, premature retirement from racing was linked to poor performance. During the first year of racing, the race earnings of an estimated 1567 (86.9%) horses were insufficient to cover training costs. The 2-year-old racing cohort outperformed the older racing cohorts in each of the performance measures under investigation. Interpretation of this result, and the long-term effects of 2-year-old racing, was limited by the problem of confounding.

Age Factors↗

PubMed2004

Race- and course-level risk factors for fatal distal limb fracture in racing Thoroughbreds.

REASONS FOR PERFORMING STUDY: Considerable variation in the rates of equine fatality at different racecourses draws attention to probable risk factors at the level of course or race that might be partly responsible. Distal limb fractures are the most common cause of equine fatality on UK racecourses and identification of risk factors for such injuries and subsequent implementation of intervention strategies could significantly reduce the total number of racecourse fatalities. OBJECTIVES: To identify race- and course-level risk factors for fatal distal limb fracture in Thoroughbreds on UK racecourses. METHODS: A case-control study design was used. Case races were defined as those in which one or more horses sustained fatal fracture of the distal limb. Controls were selected in 2 different ways. Firstly, 3 races in which no fracture occurred were selected from all races of the same type held within 5 days of the case race (Analysis 1). Secondly, 3 control races were selected for each case race from all races of the same type held in the same year (Analysis 2). One hundred and nine cases were included in the study. Information about the race and the racecourses was collected from Computer Raceform. Conditional logistic regression was used to identify the relationship between a number of independent variables and the likelihood of fracture in a race. RESULTS: Longer races with a larger number of runners were more likely to contain a fracture. Firmer going and fewer days since the last race on the same course were associated with an increased risk of fracture. The going at the course at the previous race meeting was also associated with the likelihood of fracture. CONCLUSIONS: Modifications to the going on the day of a race and greater emphasis on ground maintenance between race meetings may have an impact on the risk of fatal distal limb fracture during racing. POTENTIAL RELEVANCE: Modification of risk factors such as the going and number of days since the last race meeting could reduce the number of equine fatalities on UK racecourses. The condition of the racecourse may be an important risk factor and future research should focus on the identification of course maintenance techniques that produce the safest possible racing surfaces.

Animals↗

PubMed2004

Injuries in professional motor car racing drivers at a racing circuit between 1996 and 2000.

BACKGROUND: Research on injuries in racing drivers is limited. OBJECTIVE: To gain more information about such injuries. METHODS: Injuries recorded during and after races between 1996 and 2000 were investigated using the medical charts from the circuit medical centre at Fuji Speedway, which is one of the biggest circuits in Japan. Races were in either single seat/formula cars or saloon cars. RESULTS: Data were obtained from 39 races in single seat cars (1030 participating cars) and 42 races in saloon cars (1577 cars). Fifty injuries were recorded during the single seat car races, and 62 during the saloon car races (injury rate 1.2 per 1000 competitors per race and 0.9 per 1000 competitors per race respectively). Thirteen injuries were recorded after the race, 12 of them in saloon car racing. Bruises were the major injury in single seat car racing (58%). Lower limb bruising was more common than upper limb bruising. Most of the injuries in saloon car racing (53.2%) were neck sprains. The incidence of concussion was high in both groups compared with other high risk sports. CONCLUSIONS: There were some differences in injuries between the two types of car. No serious injuries occurred except for one death. However, the driver's body is subjected to large forces in a crash, hence the high incidence of concussion. The injuries recorded after the race emphasise that motor racing is a demanding sport.

Athletic Injuries↗

PubMed1998

Effect of distance traveled and speed of racing on body weight and serum enzyme activity of sled dogs competing in a long-distance race.

OBJECTIVE: To determine the relationship of serum biochemical values and change in body weight with finishing status (retired from or finished the race), finishing order of a team, and distance traveled for dogs participating in a long-distance sled dog race. ANIMALS: 262 of 848 dogs that participated in the 1995 Iditarod Trail sled dog race. DESIGN: Prospective study. PROCEDURE: Body weight was recorded for 261 dogs before the race and again when these dogs retired from or completed the race. Using a nonrandom convenience sample of participating dogs, blood samples were obtained from 151 dogs that retired from the race and 111 dogs that completed the race. RESULTS: Serum biochemical indices of skeletal muscle damage were significantly higher in dogs retiring during the first 500 miles of the race than in dogs retiring in the last 638 miles or finishing the race. Serum sodium concentration was less than the reference range in a significantly greater proportion of dogs that retired from the race than of dogs that completed the race. There was little relationship between finishing order and serum biochemical values. Dogs completing the race lost a mean of 8.9% of body weight, and amount of weight lost was not related to finishing order. CLINICAL IMPLICATIONS: Results indicated that exertional rhabdomyolysis develops more often in dogs that retire during the initial 500 miles of a long-distance race, compared with dogs that complete the race. There is no detectable relationship between the speed with which the race is run (finishing order) and body weight loss or serum biochemical values.

Animals↗

PubMed2001

Racehorse injuries, clinical problems and fatalities recorded on British racecourses from flat racing and National Hunt racing during 1996, 1997 and 1998.

For improvements to the safety and welfare of racehorses to be possible, it is essential to have access to basic descriptive information about the veterinary incidents encountered during horseracing. A 3 year surveillance study (1996-1998) was conducted by The Jockey Club into racing injuries, other postrace clinical problems and fatalities from all 59 British racecourses (mainland Britain only) to identify risk factors. During the survey there were 222,993 racing starts: 106,897 starts in flat races on turf (47.9%), 26,519 starts in flat races on all-weather surfaces (11.9%), 30,932 starts in chases on turf (13.9%), 51,786 starts in hurdle races on turf (23.2%) and 6,859 starts in National Hunt flat races (3.1%). Information was recorded about age of horses, racing surfaces and clinical events observed or attended by a veterinary team of 2 clinicians and one veterinary surgeon employed by the racing authority. Of the 2358 clinical events reported (1.05% of all starts), 1937 involved the musculoskeletal system and 421 involved other body systems. Six hundred and fifty-seven incidents (0.29% of starts) resulted in death or euthanasia. Eighty-one percent of limb injury reports involved forelimbs and 46% involved flexor tendons/suspensory ligaments. Nonlimb problems included epistaxis (0.83/1000 starts), 'exhausted horse syndrome' (0.47/1000 starts) and paroxysmal atrial fibrillation (0.20/1000 starts). Incidents including fatalities per 1000 starts were 24.7 from chases, 19.45 from hurdle races, 8.46 from National Hunt flat races and 3.97 from flat races. The overall tendon injury was higher in chases than in hurdle races, even though age-specific rates of tendon injury were higher in hurdle races than in chases. The risk of injuries per start increased significantly with age, while softer racing surfaces were associated with fewer fatalities and injuries than firmer surfaces. The survey described in this paper has provided an up-to-date description of the fatal and non-fatal horseracing incidents under conditions on mainland Britain, enabling progress to be made towards improving the safety and welfare of racehorses.

Age Factors↗

PubMed2004

Recognition of own-race and other-race faces by three-month-old infants.

BACKGROUND: People are better at recognizing faces of their own race than faces of another race. Such race specificity may be due to differential expertise in the two races. METHOD: In order to find out whether this other-race effect develops as early as face-recognition skills or whether it is a long-term effect of acquired expertise, we tested face recognition in 3-month-old Caucasian infants by conducting two experiments using Caucasian and Asiatic faces and a visual pair-comparison task. We hypothesized that if the other race effect develops together with face processing skills during the first months of life, the ability to recognize own-race faces will be greater than the ability to recognize other-race faces: 3-month-old Caucasian infants should be better at recognizing Caucasian faces than Asiatic faces. If, on the contrary, the other-race effect is the long-term result of acquired expertise, no difference between recognizing own- and other-race faces will be observed at that age. RESULTS: In Experiment 1, Caucasian infants were habituated to a single face. Recognition was assessed by a novelty preference paradigm. The infants' recognition performance was better for Caucasian than for Asiatic faces. In Experiment 2, Caucasian infants were familiarized with three individual faces. Recognition was demonstrated with both Caucasian and Asiatic faces. CONCLUSIONS: These results suggest that (i) the representation of face information by 3-month-olds may be race-experience-dependent (Experiment 1), and (ii) short-term familiarization with exemplars of another race group is sufficient to reduce the other-race effect and to extend the power of face processing (Experiment 2).

Child Development↗

PubMed2006

Factors influencing pre-race serum concentration of total carbon dioxide in Thoroughbred horses racing in California.

REASONS FOR PERFORMING STUDY: Many racing jurisdictions monitor pre-race serum concentration of total carbon dioxide (TCO2) among racing horses. To our knowledge, factors influencing concentration of TCO2 among horses participating in racing have not been systematically evaluated and reported. OBJECTIVES: To determine if characteristics of horses and racing conditions routinely recorded were significantly associated with pre-race concentration of TCO2, while accounting for and estimating effects of trainer and horse. METHODS: Pre-race serum TCO2 concentrations from 5028 starts made by 2,349 horses trained by 287 trainers at 2 racetracks in California during 2005 were examined. Data regarding characteristics of starters and race conditions obtained from a commercial database were recorded for each start. Data were analysed using mixed-effects, with TCO2 concentration as the dependent variable, and trainer and horse nested within trainer as random effects. RESULTS: Sex, class and distance of race, frusemide administration and cloudy weather conditions were significantly (P<0.001) associated with pre-race TCO2 concentration. Horses that finished in the top 3 positions had values that were slightly (0.2 mmol/) but significantly (P<0.001) greater than horses not finishing in the top 3. There were significant effects of trainer on pre-race TCO2 concentration. CONCLUSIONS: A variety of factors may influence pre-race TCO2 concentration in horses. Horses with better performance tend to have higher pre-race TCO2 concentrations. POTENTIAL RELEVANCE: TCO2 concentration is associated with improved performance although the magnitude of effect was quite small. Regulatory programmes based on monitoring should consider the influence of other factors on TCO2 concentration.

Administration, Oral↗

PubMed1988

Hemolysis during triathlon races: its relation to race distance.

Ninety-five triathletes were evaluated for evidence of hemolysis during triathlon races of two different distances. Thirty competitors (11 males, 19 females) were studied before and after the United States Triathlon Series (USTS) National Championship Race (1.5K swim, 40K bike, and 10K run). Pre- and post-race venous blood samples showed that 93% of the USTS athletes had decreased serum haptoglobin, post-race (mean decrease = 20%). Seven of 30 of the USTS triathletes (3 males, 4 females) were found to have occult blood in their urine, post-race. Only two of the USTS triathletes (1 male, 1 female) were anemic as judged by pre-race hemoglobin levels. Similar data were collected on 65 triatheletes (46 males, 19 females) at the Hawaii IRONMAN Triathlon World Championship (3.9K swim, 180.2K bike, and 42.2K run). Pre- and post-race venous blood samples showed that 95% of the IRONMAN athletes had decreases in serum haptoglobin, post-race (mean decrease = 32%). Occult blood was found in the post-race urine of 19 (12 males, 7 females) of the IRONMAN competitors. Nineteen IRONMAN triathletes (18 males, 1 female) were judged to be anemic from pre-race hemoglobin measurements. Data from two different length triathlons suggest that nearly all triathletes break down red blood cells during a race, and that the extent of the hemolysis is related to race distance.

Female↗

PubMed2006

The effects of interviewer race and child race on sexual abuse disclosures in forensic interviews.

This study examined the impact of interviewer race and child race on disclosures by alleged child sexual abuse victims during forensic interviews. Despite findings that supportiveness of caretaker, gender of interviewer, gender of child, and age of child affect disclosure, previous studies have failed to examine race as a variable impacting disclosure in a real-world setting. The study examined 220 cases from an archive of reports generated from forensic interviews in an urban setting. The reports were reviewed and coded for degree of disclosure, focusing on African American and Caucasian children and interviewers. The results indicate that child race and the interaction of child race and interviewer race reliably distinguished between no disclosure, tentative disclosure, and disclosure with detailed account of activity, while interviewer race alone failed to serve as a significant predictor. The interaction between child race and interviewer race was not in the predicted direction, with cross-race dyads disclosing more than same-race dyads. Results are discussed in the context of real-world applications versus the previous analogue child sexual abuse literature.

Adolescent↗

PubMed2003

From single-race reporting to multiple-race reporting: using imputation methods to bridge the transition.

In 1997, the Office of Management and Budget issued revised standards for the collection of race information within the Federal statistical system. One revision allows individuals to choose more than one race group when responding to Federal surveys and other Federal data collections. This paper explores methods that impute single-race categories for those who have given multiple-race responses. Such imputations would be useful when it is desired to conduct analyses involving only single-race categories, such as when trends over time are being examined by race group so that data collected under the old and new standards are being combined. The National Health Interview Survey has allowed multiple-race responses for several years, while also asking respondents to specify one race as their primary race. Exploratory analyses of data from the survey suggest that imputation methods that use demographic and contextual covariate information to predict primary race can have advantages with respect to lower bias and improved variance estimation compared to simpler methods discussed by the Office of Management and Budget. It also appears, however, that the relationships between primary race and covariates might be changing over time. Thus, caution should be exercised if an imputation model fitted to data from one time period is to be applied to data from another time period. Published in 2003 by John Wiley & Sons, Ltd.

Adolescent↗

PubMed2001

Differential responses in the fusiform region to same-race and other-race faces.

Many studies have shown that people remember faces of their own race better than faces of other races. We investigated the neural substrates of same-race memory superiority using functional MRI (fMRI). European-American (EA) and African-American (AA) males underwent fMRI while they viewed photographs of AA males, EA males and objects under intentional encoding conditions. Recognition memory was superior for same-race versus other-race faces. Individually defined areas in the fusiform region that responded preferentially to faces had greater response to same-race versus other-race faces. Across both groups, memory differences between same-race and other-race faces correlated with activation in left fusiform cortex and right parahippocampal and hippocampal areas. These results suggest that differential activation in fusiform regions contributes to same-race memory superiority.

Adolescent↗

PubMed1987

Molecular characterization of cloned avirulence genes from race 0 and race 1 of Pseudomonas syringae pv. glycinea.

A wide-host-range cosmid cloning vector, pLAFR3, was constructed and used to make cosmid libraries of partially digested Sau3A DNA from race 0 and race 1 of Pseudomonas syringae pv. glycinea. Two avirulence genes, avrB0 and avrC, cloned from race 0, elicited the hypersensitivity reaction (HR) on specific cultivars of soybean. Race 4 transconjugants containing avrB0 induced a dark brown necrotic HR within 24 h on the soybean cultivars Harosoy and Norchief, whereas race 4 transconjugants containing avrC induced a light brown necrotic HR within 48 h on the soybean cultivars Acme, Peking, Norchief, and Flambeau. An additional avirulence gene, avrB1, cloned from race 1, appeared to be identical to avrB0 from race 0. The avrB0 and avrC genes from race 0 were characterized by restriction enzyme mapping, Southern blot analysis, Tn5 transposon mutagenesis, and site-directed gene replacements. The effects of these three genes on the in planta bacterial growth of race 4 transconjugants have also been examined. The identification and cloning of avrB1 provides genetic evidence for a gene-for-gene interaction in the bacterial blight disease of soybean, as avrB1 from race 1 interacts with the soybean disease resistance locus, Rpg1.

Cloning, Molecular↗