Table 2.

Characteristics of patients with and without HI

	Normal hearing	HI	p value
Patients, n	47	19
Age at the study, years	7.7±4.25 (3.1–17.4)	10.98±6.4 (3.1–21.9)	0.153
Age at diagnosis, days	11.0±9.94 (3.0–49.0)	11.2±7.0 (2–24)	0.566
Age at LT4 initiation, days	13.2±12.55 (3.0–62.0)	13.26±6.3 (2–24)	0.245
Gender (M:F)	24/23	10/9	0.909
Screening TT4, µg/dL	5.3±3.06 (0.5–13.0)	3.4±2.0 (0.8–8.2)	0.095
Laboratory FT4, pmol/L	6.1±5.0 (0.4–19.2)	4.0±2.4 (0.3–8.0)	0.450

Values denote mean ± SD (range) or n (%). HI, hearing impairment; LT₄, levothyroxine; TT₄, total T₄; FT₄, free T₄.