Table 2.

Means (M), standard deviations (SD), and range of the demographic background for the two subgroups of CI users: “early-implanted” and “late-implanted”

CI group	Age at identification (years:months)	Age at first implantation (years:months)	Age at testing (years:months)
“Early-implanted”	M = 0:10 SD = 0:06 Range = 0:03–1:06	M = 3:01 SD = 0:07 Range = 2:03–4:0	M = 22:05 SD = 1:10 Range = 19:05–25:06
“Late-implanted”	M = 0:08 SD = 0:05 Range = 0:03–1:06	M = 16:07 SD = 10:01 Range = 6:0–33:04	M = 27:07 SD = 4:03 Range = 21:09–35:03