Functional magnetic resonance imaging outcomes from a comprehensive magnetic resonance study of children with fetal alcohol spectrum disorders

Table 2 Number of subjects able to participate successfully in the N-back tasks and the fMRI scan across the four study groups

fMRI—N-back task participation	1. FAS/PFAS	2. SE/AE	3. ND/AE	4. Control
	N = 20	N = 24	N = 21	N =16
	N (%)	N (%)	N (%)	N (%)
1-back task
Unable to enter or lie still in the scanner	4 (20.0)	1 (4.2)	0 (0.0)	2 (12.5)
Entered scanner
But did not provide adequate performance/effort^a	1 (5.0)	1 (4.2)	1 (4.7)	1 (6.3)
And provided adequate performance/effort^a	15 (75.0)	22 (91.6)	20 (95.3)	13 (81.3)
2-back task
Unable to enter or lie still in the scanner	5 (25.0)	2 (8.3)	2 (9.5)	2 (12.5)
Entered scanner
But did not provide adequate performance/effort^a	2 (10.0)	4 (16.7)	3 (14.3)	1 (6.3)
And provided adequate performance/effort^a	13 (65.0)	18 (75.0)	16 (76.2)	13 (81.3)

^aAdequate performance on N-back was defined as ≥65% correct true-positive and true-negative responses

ISSN: 1866-1955