Children with autistic spectrum disorders. II: parents are unable to distinguish secretin from placebo under double-blind conditions.
BACKGROUND
Standardised measures of behaviour have failed to detect short term improvement in children with autism following treatment with secretin. However, it is possible that standardised measures are insensitive to dimensions of child behaviour that are nonetheless detectable by parents.


OBJECTIVE
To determine the ability of parents of children with autism to guess, under double blind conditions, whether their child had received secretin or placebo.


METHODS
2x2 crossover randomised blinded study, comparing the effect of synthetic human secretin 2 U/kg to placebo (saline). Sixty two children with autism (aged 43-103 months) were randomly allocated to two groups: group 1 received placebo, followed six weeks later by secretin, and group 2 received secretin followed by placebo. At the conclusion of the study, parents were asked to guess their child's group assignment.


RESULTS
Twenty seven families guessed their child's group assignment correctly and 27 guessed incorrectly. In 48 instances, parents based their guess on perceived improvement; in six cases, parents based their guess on perceived deterioration. Six families saw no difference after either infusion, and offered no guess. One family dropped out after the first infusion, and one family was lost to follow up after the second infusion.


CONCLUSIONS
In a controlled setting, parents of young children with autism are unable to distinguish the short term behavioural effects of secretin from placebo.
Coplan
J
J
Division of Child Development and Rehabilitation, Children's Seashore House of The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA.
Souders
M C
MC
Mulberg
A E
AE
Belchic
J K
JK
Wray
J
J
Jawad
A F
AF
Gallagher
P R
PR
Mitchell
R
R
Gerdes
M
M
Levy
S E
SE
D001321:Autistic Disorder / Q000188:drug therapy* / Q000523:psychology; D002648:Child; D002675:Child, Preschool; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D010290:Parents / Q000523:psychology; D015990:Placebo Effect; D011619:Psychotropic Drugs / Q000009:adverse effects / Q000627:therapeutic use*; D012633:Secretin / Q000009:adverse effects / Q000627:therapeutic use*; D016896:Treatment Outcome
D011619:Psychotropic Drugs; D012633:Secretin