(UNHS) seen at age 8 years persist through the second decade. Design Prospective cohort
study of a population sample of children with permanent childhood hearing impairment
(PCHI) followed up for 17 years since birth in periods with (or without) UNHS. Setting Birth
cohort of 100 000 in southern England. Participants 114 teenagers aged 13–19 years, 76
with PCHI and 38 with normal hearing. All had previously their reading assessed aged 6–10 …