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Biomedical subjects

A K Kroksmark

Publications and source records attributed to A K Kroksmark.

4 recordsLinked to original sources
PubMed2001

Longitudinal data analysis: an application to construction of a natural history profile of Duchenne muscular dystrophy.

A 30-month prospective study of 27 Scandinavian boys with confirmed diagnosis of Duchenne muscular dystrophy was carried out to construct profiles of the natural history of the disease. Assessments which included measures of voluntary muscle strength and function were done at 3 monthly intervals except for the first and second which were separated by 1 month. Recently developed statistical methods for analysis of longitudinal data with repeated observations on the same individual were used avoiding the problem of induced serial correlations. This allowed for the construction of both reference and prediction profiles for the variables %MRC, motor ability, walking time for 10 m and the sum of myometry of seven muscle groups.

Child↗
PubMed2001

Muscle strength and motor function in children and adolescents with spinal muscular atrophy II and III.

The aim of this study was to quantify isometric muscle strength and motor function in children and adolescents with spinal muscular atrophy (SMA) and to analyse the impact of reduced muscle strength on motor function. Six children and adolescents with SMA II and eight with SMA IlI were assessed regarding isometric muscle strength and motor function. Isometric muscle strength was tested with a myometer and the values obtained were compared with normative data. Motor function was videotaped and 20 movements were scored according to a three-point scale. All of the assessed children and adolescents with SMA II and SMA III showed reduced muscle strength, but there were great differences within the group. The typical pattern of muscle weakness in SMA, with proximal weakness greater than distal and the lower limbs more affected than the upper, was also seen in these children. The muscle weakness affected motor function in all assessed children. Walking, transfer from lying or sitting to the standing position and stair-climbing were possible in some of the children, despite marked reduction of muscle strength. The study increases our knowledge concerning the degree of muscle weakness in children with SMA and the impact of muscle weakness on motor function. The results increase our possibilities of understanding the prerequisites for everyday life in these children and planning therapeutic interventions. Repeated assessments with the methods used in this study may be used to monitor the course of the disease and to evaluate the efficacy of treatment.

Activities of Daily Living↗
PubMed2000

A randomized comparative study of two methods for controlling Tendo Achilles contracture in Duchenne muscular dystrophy.

A 30-month prospective randomized study of 27 Scandinavian boys with confirmed diagnosis of Duchenne muscular dystrophy was done to compare the effect of passive stretching combined with the use of night splints (group A) or passive stretching (group B) on the evolution of Tendo Achilles contractures. Assessments were based on the methodology of Scott et al. (Muscle Nerve 1982;5:291-301)Analysis of the pattern and mechanism of dropout was done to eliminate bias between the two groups. Logistic regression showed that Tendo Achilles contracture was the most important variable (P=0.0020) for dropout. Methods of statistical analysis for longitudinal data avoiding induced serial correlations were used in the analysis. The expected annual change in Tendo Achilles contracture was found to be 23% less in group A than in group B after equalization for total muscle strength (%MRC).

Achilles Tendon↗