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Table 6 ANOVA results comparing groups on ADOS and ADI-R

From: Parent-reported and clinician-observed autism spectrum disorder (ASD) symptoms in children with attention deficit/hyperactivity disorder (ADHD): implications for practice under DSM-5

  ADHD ASD    
  (n = 48) (n = 164)    
  Mean (SD) Mean (SD) F df p value
ADOS domainsa      
 CSS SA 3.3 (2.0) 6.4 (2.4) 66.80 1, 210 <0.001
 CSS RRB 3.3 (2.5) 7.0 (2.5) 80.60 1, 210 <0.001
 CSS overall 2.7 (1.6) 6.5 (2.5) 99.51 1, 210 <0.001
ADOS factorsb      
 Basic soc 1.2 (1.2) 3.2 (2.1) 41.16 1, 201 <0.001
 Interaction quality 1.8 (1.3) 3.6 (1.9) 38.19 1, 210 <0.001
 RRBs 0.6 (0.8) 2.7 (1.9) 53.26 1, 210 <0.001
ADI-R algorithm domains      
 Social total 12.1 (7.1) 16.1 (7.0) 11.43 1, 200 <0.01
 Communication total 10.4 (6.3) 13.7 (5.3) 12.24 1, 200 <0.01
 RRB-ADI total 4.6 (3.2) 6.0 (3.0) 8.21 1, 200 <0.01
ADI-R current domains      
 SC total 13.0 (7.5) 13.7 (7.1) 0.33 1, 184 n.s.
 RSM total 2.9 (2.5) 4.1 (2.7) 6.66 1, 193 n.s.
 IS total 5.6 (3.4) 5.2 (3.0) 0.34 1, 127 n.s.
  1. ADHD attention deficit/hyperactivity disorder, ASD autism spectrum disorder, CSS calibrated severity score, df degrees of freedom, IS insistence on sameness, n.s. not significant (p value >0.01), RRBs restricted repetitive behaviors on ADOS, RRB-ADI restricted repetitive behaviors on ADI-R, RSM repetitive sensory motor, SA social affect, SC social communication, SD standard deviation
  2. aIncludes both modules 3 and 4
  3. bSee text for details based on Bishop, Havdahl, Huerta, and Lord (in prep); see text for ANCOVA results