TABLE 2

Sample Characteristics

UNHS (NSW 2003–2005) (n = 69a)Risk Factor (VIC 2003–2005) (n = 65a)Opportunistic (VIC 1991–1993) (n = 86b)
Child
 Age at assessment, mo, mean (SD)65.3 (6.6)62.8 (4.9)95.3 (5.3)
 Male gender, %575562
 Initial severity of hearing impairment, mean (SD)61.0 (27.1)64.6 (31.6)64.5 (24.8)
 Current hearing impairment severity, mean (SD)65.2 (30.2)63.8 (32.4)57.3 (21.8)
 Nonverbal IQ,c mean (SD)
  Whole sample89.7 (31.9)93.0 (28.0)104.6 (16.7)
  Children without intellectual disability103.4 (15.2)102.0 (15.5)104.6 (16.7)
Family
 Language other than English household, %81011
 Disadvantage Index, mean (SD)1004.4 (71.4)1019.5 (60.7)1019.4 (68.1)
 Income category, %
  <$33 800 per year2016
  $33 800–$51 999 per year2527
  $52 000–$103 999 per year2929
  ≥$104 000 per year2628
 Parent with tertiary-level education, %314428
  • NSW, New South Wales; VIC, Victoria; --, data not available.

  • a Percent missing data (UNHS and risk factor combined sample): initial severity 3.0%, current severity 3.0%, nonverbal IQ 6.0%, languages other than English (LOTE) 3.7%, income 9.7%, educational level 6.0%, all other measures complete.

  • b Percent missing data (opportunistic): age at assessment 1.2%, initial severity 4.7%, current severity 15.1%, nonverbal IQ 1.2%, disadvantage index 1.2%, all other measures complete.

  • c Nonverbal IQ including unassessable children for whom the basal standard score (30) was imputed.