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Therapies for Children With Autism Spectrum Disorders

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that this somnolence improved over time. 202,206,210,211 Both these studies also reported more<br />

extrapyramidal symptoms, including tremor, dyskinesia, and rigidity, in the risperidone arm in<br />

comparison with the placebo arm, but these events were categorized and summed differently<br />

between the two studies and did not clearly show a statistically significant difference between<br />

treatment arms. 202,206,210,211<br />

The RUPP study 206 also reported a greater rise in prolactin levels in the risperidone arm<br />

(27.7 ng/mL) compared with the placebo arm (0.8 ng/mL); 209 although it did not report clinical<br />

events such as gynecomastia or galactorrhea that could be related to elevated prolactin<br />

levels. 203,206 The RUPP study specifically assessed cognitive function in a subset of subjects and<br />

found no worsening and some evidence of improvement on risperidone that would not be<br />

statistically significant after correction <strong>for</strong> multiple testing. 201,206<br />

Table 17. Outcomes of RCTs of antipsychotic medications <strong>for</strong> challenging and repetitive<br />

behaviors<br />

Author, year, country<br />

Groups, N enrollment / N<br />

final<br />

Study quality<br />

RUPP 203 2005, US<br />

G1:risperidone, 16/16<br />

G2:placebo, 16/16<br />

Quality: Fair<br />

Shea, et al. 210,211<br />

2004, Canada<br />

G1: risperidone, 41/39<br />

G2: placebo, 39/38<br />

Quality: Fair<br />

Mean age, years<br />

± SD<br />

NR, subset of<br />

subjects from<br />

RUPP 2002<br />

G1: 7.6 ± 2.3<br />

G2: 7.3 ± 2.3<br />

Mean IQ ±SD Outcome<br />

measure/Baseline<br />

scores, mean ±SD<br />

NR, subset of<br />

subjects from<br />

RUPP 2002<br />

G1:<br />

≥85:3<br />

71-84:6<br />

50-70:12<br />

35-49:10<br />

G2:<br />

≥85:11<br />

71-84:4<br />

50-70:8<br />

35-49:12<br />

63<br />

Overall,<br />

ABC-C-Irritability:<br />

27.6 ± 6.1<br />

Overall,<br />

ABC-C-Hyperactivity/<br />

Noncompliance: 34.4<br />

± 8.7<br />

Relapse: 2<br />

consecutive weeks of<br />

25% increase on<br />

ABC-C-Irritability and<br />

CGI-I of “much worse”<br />

or “very much worse”<br />

ABC-C-Irritability: G1:<br />

18.9 ± 8.8<br />

G2: 21.2 ± 9.7<br />

ABC-C-Hyperactivity/<br />

Noncompliance: G1:<br />

27.3 ± 9.7<br />

G2: 30.9 ± 8.8<br />

ABC-Stereotypic<br />

behavior:<br />

G1: 7.9 ± 5.0<br />

G2: 8.1 ± 5.6<br />

Outcome<br />

measure/Posttreatment<br />

scores a ,<br />

mean ± SD<br />

Relapse:<br />

G1:<br />

2/16 (12.5%)<br />

G2: 10/16 (62.5%)<br />

p=0.01<br />

Change in:<br />

ABC-C-Irritability:<br />

G1: -12.1 ± 5.8<br />

G2: -6.5 ± 8.4<br />

p ≤ 0.001<br />

ABC-C-Hyperactivity/<br />

Noncompliance:<br />

G1: -14.9 ± 6.7<br />

G2: 7.4 ± 9.7<br />

p ≤ 0.001<br />

ABC-Stereotypic<br />

behavior:<br />

G1: -4.3 ± 3.8<br />

G2: -2.4 ± 4.0<br />

p ≤ 0.05

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