Table 3.

Test-retest reliability measures of TSH, FT4, FT3, SPINA-GT, and SPINA-GD from repeated measurements with at least one month interval in 20 healthy volunteers from the SPINA network [11, 116]. e: repeatability = (interindividual variance)/(intraindividual variance + interindividual variance) [300]. Larger figures denote higher reliability.

Parameter	e	R 2
TSH	0.63	0.16
FT4	0.71	0.35**
FT3	0.68	0.36**
SPINA-GT	0.73	0.42**
SPINA-GD	0.64	0.36**

**P < 0.01.