Prevalence and risk factors in serous arthritis in the carpal joint of Norwegian coldblooded trotters.

The research article explores the incidence and risk factors of a joint disorder called ‘carpitis’ in a breed of Norwegian coldblooded trotters. The study evaluates the relationship between early lifestyle factors like training regimes, and the development of this condition among 508 young horses, and concludes that certain types of training can increase or decrease the risk of carpitis.

Study Demographics and Prevalence of Carpitis

• In a total population of 508 four-year-old coldblooded trotters, 135 or 27% were found to have carpitis, a condition affecting the carpal (wrist) joint.
• The affected horses consisted of 30 with carpitis on the left frontlimb, 52 on the right frontlimb, and 53 with the condition on both limbs.
• Among the various categories of horses – 105 stallions, 135 geldings, and 269 mares – the condition was most prevalent among the mares (28%), with a 25% occurrence rate in the other two categories.

Impact of Training Regimes on Carpitis Occurrence

• Information on the equine training routines during four life periods of 378 horses in the study was analyzed.
• The odds ratios for the different training variables were found to be similar across all four periods.
• A 10% increase in the sire index – calculated as the percentage of progeny with carpitis for each sire – corresponded to an odds ratio of 1.7, which indicates that horses with a higher sire index were more likely to develop carpitis.
• Three specific training activities were found to influence carpitis risk. Horses left out in a paddock at age two had a decreased risk (odds ratio of 0.4). However, horses subjected to activities such as walking in a jogcart and intense, fast training demonstrated increased risk with odds ratios of 2.5 and 2.0 respectively.

Other Factors: Diet and Nutrition

• Data on dietary plans for the first three years of the horses’ lives did not show any significant correlation with the occurrence of carpitis.
• The dietary plans were generally found to be within the normal range with one exception: Calcium levels were found to be lower than recommended, although the effect of calcium on carpitis was not explored in the paper.

The study therefore concludes that specific training programs may significantly increase the risk of developing carpitis in young trotters, and recommends further research to understand the application of these findings in the prevention of the condition.