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Laboratory Procedure Manual - Centers for Disease Control and ...

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Free Thyroxine (Free T4) in Serum<br />

NHANES 2007-2008<br />

19. Summary Statistics <strong>and</strong> QC Graphs<br />

Summary Statistics <strong>for</strong> Free Thyroxine (FT4) by Lot<br />

Lot N Start Date End Date Mean<br />

St<strong>and</strong>ard<br />

Deviation<br />

Coefficient of<br />

Variation<br />

40671 100 2/5/2007 10/29/2007 0.716 0.066 9.3<br />

40673 100 2/5/2007 10/29/2007 4.914 0.303 6.2<br />

40672 35 9/13/2007 10/29/2007 2.949 0.082 2.8<br />

40701 200 10/31/2007 1/29/2009 0.646 0.054 8.3<br />

40702 200 10/31/2007 1/29/2009 1.846 0.080 4.3<br />

40703 200 10/31/2007 1/29/2009 3.759 0.180 4.8<br />

2007-2008 Free Thyroxine (FT4) Quality <strong>Control</strong><br />

6<br />

40673<br />

5<br />

40703<br />

4<br />

40672<br />

3<br />

2<br />

40702<br />

1<br />

40671 40701<br />

0<br />

2/5/2007 5/16/2007 8/24/2007 12/2/2007 3/11/2008 6/19/2008 9/27/2008 1/5/2009<br />

14

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