Between-site reliability of startle prepulse inhibition across two early psychosis consortia.

Abstract:

:Prepulse inhibition (PPI) and reactivity of the acoustic startle response are widely used biobehavioral markers in psychopathology research. Previous studies have demonstrated that PPI and startle reactivity exhibit substantial within-site stability; however, between-site stability has not been established. In two separate consortia investigating biomarkers of early psychosis, traveling participants studies were carried out as a part of quality assurance procedures to assess the fidelity of data across sites. In the North American Prodromal Longitudinal Studies (NAPLS) consortium, eight normal participants traveled to each of the eight NAPLS sites and were tested twice at each site on the startle PPI paradigm. In preparation for a binational study, 10 healthy participants were assessed twice in both San Diego and Mexico City. Intraclass correlations between and within sites were significant for PPI and startle response parameters, confirming the reliability of startle measures across sites in both consortia. There were between-site differences in startle magnitude in the NAPLS study that did not appear to be related to methods or equipment. In planning multisite studies, it is essential to institute quality assurance procedures early and establish between-site reliability to assure comparable data across sites.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Cadenhead KS,Addington J,Cannon TD,Cornblatt BA,de la Fuente-Sandoval C,Mathalon DH,Perkins DO,Seidman LJ,Tsuang M,Walker EF,Woods SW,Bachman P,Belger A,Carrión RE,Donkers FC,Duncan E,Johannesen J,León-Ortiz P,Light G

doi

10.1097/WNR.0b013e3283637845

subject

Has Abstract

pub_date

2013-08-07 00:00:00

pages

626-30

issue

11

eissn

0959-4965

issn

1473-558X

pii

00001756-201308070-00009

journal_volume

24

pub_type

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