Table 5.

Genetic Knowledge of Parents of Children Affected With Spinal Muscular Atrophy (SMA)

Topics	%
Parents who identify causative gene as SMN1	70
Parents who know SMN is on a chromosome	85
Parents who identify affected genotype	56
Parents who identify carrier genotype	73
Parents who identify recurrence risk	93
Parents who think genetic information is helpful	88
Parents who understand that a negative carrier test does not entirely rule out SMA recurrence	59
Parents who believe SMA can occur when both parents are carriers	99
Parents who believe SMA can occur when 1 parent is a carrier	27
Parents who believe SMA can occur with 0 carriers	68
Parents who infer a second child with SMA will have the same type as the firsta	63
Parents who perceive that SMN2 copy number predicts severity	77
Parents who know their child’s SMN2 copy number	51

^aData refer only to type 2 families.