Table 3

Mean age at hearing loss and interval between diagnosis in sporadic and familial cases

M/FAge (y) HLAge (y) VSFU (y)Interval 1st to 2ndMutation detected Yes/No 
Mean (range)
Sporadic:
UVS6/1331.234.44.25/11
 (S1–19)(15–57)(15–59)(1–15)
 BVS4/921.625.112.96.42/9
 (S20–32)(6–44)(11–48)(4–29)(0–22)
Familial:
BVS
Parent4/227.837.012.86.55/1
 (P1–6)(17–37)(18–56)(6–21)(0–16)
 Child2/316.017.66.03.82/3
 (C3–7)(13–21)(11–27)(5–7)(2–6)
UVS:
Child1/12423.53.52/0
 (C1–2)(19–29)(18–29)(3–4)