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Table 1 Sample characteristics

From: Increased aperiodic gamma power in young boys with Fragile X Syndrome is associated with better language ability

  Age-matched
N = 12
FXS
N = 11
Cog-matched
N = 12
Age, mean in months (SD) 47.6 (13.1) 53.5 (16.3) 29.8 (10.1)
Maternal education, n (%)
 < 4-year college degree 0 (0) 0 (0) 1 (8)
 4-year college degree 4 (33) 2 (18) 2 (17)
 > 4-year college degree 8(77) 9 (81) 9 (75)
Paternal Education, n (%)
 < 4-year college degree 0 (0) 1 (9) 3 (25)
 4-year college degree 6 (50) 4 (36) 6 (50)
 > 4-year college degree 6 (50) 6 (54) 3 (25)
Household income, n (%)
 < $40,000 0 (0) 0 (0) 1 (8)
 $40–70,000 0 (0) 3 (27) 0 (0)
 $70–100,000 3 (25) 3 (27) 0 (0)
 $100–140,000 5 (42) 1 (8) 4 (33)
 > $140,000 4 (33) 4 (36) 7 (58)
Race, n (%)
 White 7 (58) 9 (81) 9 (75)
 African American 0 (0) 0 (0) 1 (8)
 Asian 1 (8) 1 (9) 0 (0)
 Mixed 4 (33) 1 (9) 2 (17)
Ethnicity, n (%)
 Hispanic or Latino 0 (0) 3 (27) 1 (8)
Mullen Scales of Early Learning
 Nonverbal Developmental Quotient (Mean ± SD) 112.6 ± 15.7 58.2 ± 14.3 102.8 ± 16.2
 Visual Reception Age Equiv (months ± SD) 54.5 ± 8.8 32.3 ± 14.4 32.2 ± 13.3
 Fine Motor Age Equiv
(months ± SD)
44.6 ± 7.1 29.5 ± 12.0 29.5 ± 12.0
EEG Quality Measures
 Number of 2 s Segments 116.9 ± 17.4 82.1 ± 38.5 101.9 ± 34.4
 Percent Good Channels 94.9 ± 4.0 94.1 ± 3.6 90.6 ± 3.8
 Percent ICs Rejected 36.2 ± 7.6 34.0 ± 9.1 37.0 ± 10.0
 Median Artifact Probability 0.03 ± 0.02 0.07 ± 0.04 0.05 ± 0.05