Table 2

Details of each group

RetrospectiveProspectiveDifference
Number recruited1519
Mean age (SD)13.3 (1.71)9.3 (2.10)t=5.97
p<0.0001
Male/female12/314/5Fisher exact
p=0.99
Response to DDAVP87χ2=0.38
p=0.54
Number committing error (copy or memory)815Fisher exact
p=0.15
Mean height % (SD)57.7 (31.47)56.6 (31.08)t=0.10
p=0.98