Table 1.

Demographic Characteristics of Study Sample

CharacteristicNo.MeanSDRange
Age of identification 1121.551.10.00–4.53
Age at entry 1121.831.13.03–4.53
Degree of hearing loss (in dB)11277.7524.2025–120
 Mild (21–40 dB)930.845.4325–40
 Mild to moderate (41–55 dB)1748.804.3341–55
 Moderate (56–70 dB)1963.613.8356–70
 Severe (71–90 dB)2080.515.0971–88
 Profound (91 dB+)47101.905.5691–120
Nonverbal IQ84102.2714.1670–147
Ages of enrollment by  category
 0–11 mo (.0–.92 y)24.45.27.03–0.91
 11.1–23 mo (.93–1.92 y)421.39.29.93–1.90
 23.1–35 mo (1.93–2.92 y)242.37.311.95–2.90
 35.1+ mo (2.93+y)223.61.483.00–4.53
  • * Ages of identification and enrollment are expressed in years/portions of years.