title: Evaluating the CSAPPA subscales as potential screening instruments for developmental coordination disorder.
abstract: OBJECTIVE
  In this study, we assess the potential of three subscales of the Children's Self-Perceptions of Adequacy in and Predilection for Physical Activity (CSAPPA), a measure of generalised self-efficacy, as possible screens for developmental coordination disorder (DCD).
  
  
  METHODS
  We used the Bruininks-Oseretsky Test of Motor Proficiency short form (BOTMP-SF) to identify probable cases of DCD. We administered the BOTMP-SF and the CSAPPA to 590 children in grades 4-8 from four schools in the Niagara region of Ontario, Canada. We used receiver operator characteristic (ROC) analysis to assess and compare the performance of the subscales and the full instrument.
  
  
  RESULTS
  The area under the receiving operating characteristic curve (AUC), a measure of the overall performance of the test against a diagnostic standard, was good for the full CSAPPA (AUC = 0.81, 95% CI 0.75 to 0.87). The adequacy (AUC = 0.79, 95% CI 0.73 to 0.85) and predilection (AUC = 0.80, 95% CI 0.74 to 0.87) subscales had performance statistically equivalent to the full scale. Since the adequacy subscale is shorter and has good content validity with respect to DCD, we ran additional analyses on this measure. A cut-point of 24 on this subscale gives a sensitivity of 0.86 (95% CI 0.76 to 0.97) and a specificity of 0.47 (95% CI 0.43 to 0.51).
  
  
  CONCLUSIONS
  The adequacy subscale of the CSAPPA appears to be equivalent to the full measure for the purposes of screening for DCD. Further research should explore the possibility of adding further criteria to improve the CSAPPA's modest specificity in this role.
authors.affiliation: Health Systems Research and Consulting Unit, Centre for Addiction and Mental Health, Toronto, ON, Canada. john_cairney@camh.net
authors.forename: John
authors.initials: J
authors.lastname: Cairney
authors.forename: Scott
authors.initials: S
authors.lastname: Veldhuizen
authors.forename: Paul
authors.initials: P
authors.lastname: Kurdyak
authors.forename: Cheryl
authors.initials: C
authors.lastname: Missiuna
authors.forename: Brent E
authors.initials: BE
authors.lastname: Faught
authors.forename: John
authors.initials: J
authors.lastname: Hay
mesh_terms: D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D019957:Motor Skills Disorders / Q000175:diagnosis*; D009864:Ontario; D012372:ROC Curve; D020377:Self Efficacy; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires