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, % | 57 | 55 | 62 | ||
| 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 sample | 89.7 (31.9) | 93.0 (28.0) | 104.6 (16.7) | ||
| Children without intellectual disability | 103.4 (15.2) | 102.0 (15.5) | 104.6 (16.7) | ||
| Family | |||||
| Language other than English household, % | 8 | 10 | 11 | ||
| Disadvantage Index, mean (SD) | 1004.4 (71.4) | 1019.5 (60.7) | 1019.4 (68.1) | ||
| Income category, % | |||||
| <$33 800 per year | 20 | 16 | — | ||
| $33 800–$51 999 per year | 25 | 27 | — | ||
| $52 000–$103 999 per year | 29 | 29 | — | ||
| ≥$104 000 per year | 26 | 28 | — | ||
| Parent with tertiary-level education, % | 31 | 44 | 28 | ||
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.