(a).

	TSH		FT3		FT4		T3		T4
	B (95% CI)	P	B (95% CI)	P	B (95% CI)	P	B (95% CI)	P	B (95% CI)	P
Factor 1	-0.056 (-0.107, -0.004)	0.034	0.010 (-0.036, 0.056)	0.670	-0.051 (-0.233, 0.132)	0.586	0.014 (-0.009, 0.037)	0.225	0.575 (-0.885, 2.036)	0.440
Factor 2	0.189 (-0.044, 0.422)	0.111	-0.033 (-0.240, 0.174)	0.753	-0.190 (-1.019, 0.638)	0.652	-0.058 (-0.161, 0.046)	0.276	-3.196 (-9.820, 3.428)	0.344
Factor 3	-0.026 (-0.073, 0.020)	0.269	0.019 (-0.023, 0.060)	0.371	0.045 (-0.121, 0.211)	0.592	0.011 (-0.009, 0.032)	0.284	0.507 (-0.818, 1.833)	0.453
Factor 4	0.001 (-0.002, 0.010)	0.202	-0.004 (-0.046, 0.038)	0.863	-0.056 (-0.224, 0.122)	0.512	0.004 (-0.017, 0.025)	0.710	-0.506 (-1.848, 0.836)	0.459