Table 2.

Characteristics of Physicians Responding to the Survey for the First Time (Number of Respondents = 363)

Question regarding physician characteristic	Response options	Percentage (%)	% ATA composition in 2017
Do you prescribe and adjust LT4 therapy for patients with hypothyroidism?	Yes	100
	Noa	0
How many years have you been in practice?	In training	2.8
	<5 years	8.8
	5–10 years	12.6
	11–20 years	22.5
	>20 years	53.3
Where do you practice?	North America	63.5	74
	South America	6.6	3
	Europe	17.6	9
	Asia	8.0	12
	Other	4.4	1
Which best describes your specialty?	Endocrinologist	86.0	63
	Surgeon	4.7	18
	Nuclear medicine physician	4.1	3
	Internist or primary-care physician	1.7	17
	Other	3.6

^aResults only reported for those who answered yes.

ATA, American Thyroid Association.