Table 2. Percent unconditioned (URs) and startle responses (SRs) by diagnostic group and age.

	FAS	Heavy exposed	Controls	Mean
Short delay
Percent URs
5 years	72.4 (3.8)	81.6 (1.7)	77.2 (2.5)	77.0 (1.6)
11 years	90.9 (4.8)	90.7 (2.2)	87.5 (2.2)	89.7 (1.9)
Mean	81.6 (3.1)	86.2 (1.4)	82.4 (1.7)	83.4 (1.3)
Percent SRs/alphas
5 years	6.4 (1.3)	3.1 (0.6)	4.7 (0.9)	4.7 (0.6)
11 years	3.7 (1.7)	3.9 (0.8)	3.5 (0.8)	3.7 (0.7)
Mean	5.0 (1.1)	3.5 (0.5)	4.1 (0.6)	4.2 (0.4)
Trace
Percent URs
	89.6 (5.6)	85.3 (3.6)	87.4 (3.9)	87.4 (2.6)
Percent SRs/alphas
	3.1 (2/6)	13.6 (1.7)	6.7 (1.8)	7.8 (1.2)

Values are means (SE). N = 80 at 5 years and 63 at 11 years for delay; N = 32 for trace. Data for one child from the 5-year cohort who only completed session 1 were omitted due to listwise deletion.