Measuring treatment outcome in children with developmental coordination disorder; responsiveness of six outcome measures

Abstract

Purpose Although measuring outcome of rehabilitation in children with Developmental Coordination Disorder is considered important no consensus exists on which instruments to use. An important attribute of a measurement instrument would be that it is sensitive to clinical changes. The aim of this prospective, observational study was therefore to investigate the responsiveness of six potentially suitable instruments. Methods Forty-one children (34 boys, median age 7.8 years, Inter Quartile Range: 7.2–9.2) receiving multidisciplinary rehabilitation treatment for Developmental Coordination Disorder were included (mean treatment time: 32.8 h, Standard Deviation 7.3). The following instruments were applied before and after rehabilitation: Movement-Asessment-Battery-Children-2 (MABC-2), Canadian Occupational Performance Measure (COPM), Systematic detection writing problems (SOS-2-NL), DCD-daily, Behaviour Rating Inventory of Executive Function (BRIEF), and TNO-AZL children’s Quality of Life questionnaire (TACQOL)). Change-scores (paired t-test/Wilcoxon-test) and responsiveness (Effect-sizes and Standardized-Response-Means) were calculated. Results Significant differences over time were found for the Canadian Occupational Performance Measure, DCDdaily and Movement-Asessment-Battery-Children-2 (p < 0.05). The responsiveness of these instruments was moderate-high (Canadian Occupational Performance Measure-performance Effect-Size:1.70/Standardized-Response-Mean:1.81, Canadian Occupational Performance Measure-satisfaction Effect-Size:1.65/Standardized-Response-Mean 1.53; DCDdaily-total-score Effect-Size:0.40/Standardized-Response-Mean:0.62, DCDdaily-Quality-score Effect-Size:0.74/Standardized-Response-Mean:0.89, DCDdaily-time-score Effect-Size:0.21/Standardized-Response-Mean:0.43; MABC-2-total-score Effect-Size:0.42/Standardized-Response-Mean:0.43, MABC-2-Ball-skills-score Effect-Size:0.33/Standardized-Response-Mean:0.36). Systematic detection of writing problems (SOS-2-NL), Behaviour Rating Inventory of Executive Function (BRIEF) and TNO-AZL children’s Quality of Life questionnaire (TACQOL) were not responsive to change. Conclusion Although the Movement-Asessment-Battery-Children-2 test is the most widely used instrument when measuring rehabilitation outcome in Developmental Coordination Disorder, the Canadian Occupational Performance Measure and DCDdaily seem to be more responsive and constitute a valuable addition. Implications for rehabilitation Currently, there is no consensus on the preferred measurement instruments to evaluate the outcomes of rehabilitation in children with Developmental Coordination Disorder. The responsiveness of the Canadian Occupational Performance Measure (COPM) was found to be large, of the DCDdaily moderate to large, and of the Movement-Assessment-Battery-Children-2 (MABC-2) small, whereas the systematic detection of writing problems (SOS-2-NL; Systematisch Opsporing Schrijfproblemen-2-NL), Behavior Rating Inventory of Executive Functioning (BRIEF) and TNO-AZL Questionnaire for Children’s Health-Related Quality of Life (TACQOL) were not responsive to change. Although the Movement-Assessment-Battery-Children-2 (MABC-2) is commonly used in Developmental Coordination Disorder rehabilitation, applying the Canadian Occupational Performance Measure (COPM) and DCDdaily should be considered, as these instruments were more sensitive to clinical changes.