Autism prodrome 84 of 89
Table 2
Prospective screening studies
Reference |
Age (Months) |
Study design |
Administration |
Key items/content |
Instrument parameters | |
Baron-Cohen Baird et al. (2000) |
CHAT |
18m |
High risk sibling design; 2-stage |
Parental questionnaire and |
Joint attention; pretend play |
Sensitivity = 38% (1-stage) Positive predictive value = |
Willemsen- (2006) |
ESAT |
14m |
2-stage population screening (n = 31,724) |
Health practitioner |
Initial screen: play, emotional |
Positive predictive value for Positive predictive value for |