Table 1.

The Accuracy of Four Approaches to Early Detection

Developmental Status
Developmental DisabilitiesNo Developmental Disabilities
N = 20N = 83
Approach to
Screening
True Positive
(% With Disabilities
Correctly Identified)
False Negative
(% Undetected)
True Negative
(% Without
Disabilities
Correctly Identified)
False Positive
(% Overdetected)
Total Requiring
Direct Screening
%N%N%N%N%N
Parents' concerns75%1525%571%5929%240%0
Direct screening100%103
 BDIST75%1525%572%6028%23
 Denver-II85%1715%345%3755%46
Two-stage positive (both
parents' concerns and
screening test are positive)
38%39
 BDIST60%1240%893%777%6
 Denver-II65%1335%784%7016%13
Two-stage negative (either
parents' concerns orscreening
test are positive)
62%64
 BDIST95%1810%251%4249%41
 Denver-II95%195%131%2669%57