3a. How old was -- when [he/she] began to have trouble hearing?
00[] At birth (4a)
01[] Less than 1 year old (4a)
Years old ____ (4a)
88[] No trouble (4a)
99[] DK (3c)
b. How old was -- when [he/she] began to have serious trouble hearing or became deaf?
00[] At birth (4a)
01[] Less than 1 year old (4a)
Years old ____ (4a)
88[] No trouble (4a)
99[] DK (3c)
c. Was it before or after -- 19th birthday?
1[] Before
2[] After (4a)
9[] DK (4a)
d. Was it before or after -- 3rd birthday?
1[] Before
2[] After
9[] DK