Table 1.

Patients on Thyroid Replacement (n=41) with Normal and Abnormal TFTs

	Patients with abnormal TFTs	Patients with normal TFTs	P values
N	15	23
Age (Years ± 1 SD)	77.4 ± 11.4	77.7 ± 9.86	0.466
Gender
Males	5 (33.3%)	7 (30.4%)
Females	10 (66.6%)	16 (69.5%)
Average dose of thyroid replacement
Levothyroxine (mcg)	129.1 ± 61.3	72 ± 49.3	<0.01
Dessicated thyroid (mg)	0	60
TSH (normal range 0.4–4.0 mU/L)*	0.33 ± 0.44	2.65 ± 2.00	<0.01
FT4 (normal range 0.86–1.94 mg/dL)†	1.53 ± 0.38	1.09 ± 0.74	0.03
Amiodarone	3	2
Years on Thyroid Replacement	2.36 ± 1.63	2.04 ± 0.96	0.22

^*Average of the lowest values is reported for abnormal patients and average of all values available is reported for normal patients.

^†Average of the highest values is reported for abnormal patients and average of all values availabe is reported for normal patients.