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. Author manuscript; available in PMC: 2017 Jul 30.
Published in final edited form as: Am J Med Genet A. 2014 Nov 26;167A(2):331–344. doi: 10.1002/ajmg.a.36864

Table I.

Demographics of Angelman syndrome study cohort.

Full Cohort Known Genotype
% (n=109) % (n=93) p-valuea

Mean age 24.3y (sd: 7.24) 24.3 y (sd: 7.46) 0.895b
 16–20y 38% 38% 1.000
 21–25y 27% 28% 0.552
 26–30y 21% 19% 0.322
 31–40y 11% 11% 0.689
 41–50y 4% 4% 1.000
Sex
 Female 50% 51% 0.788
 Male 50% 49%
Interviewee
 Mother 89% 89% 0.689
 Father 6% 5% 0.273
 Both 2% 2% 1.000
 Other 3% 3% 1.000
Genotype
 Maternal deletion 68% 80% --
 UBE3A mutation 8% 10% --
 UPD 9% 11% --
 Mosaic Single case -- --
 Clinical 10% -- --
 Unknown 5% -- --
Home environment
 Parents’ home 75% 74% 0.756
 Group home 17% 16% 0.731
 Residential center 6% 7% 0.588
 Other 3% 3% 1.000
a

2-sided Fisher’s Exact Test.

b

Independent Samples T-Test/Levene’s Test for Equality (Sig. 0.510). y: years, UPD: uniparental disomy.