Table 2 Dried blood spot total T4 concentration (nmol/L) per calendar year (median (P5-P95) for total neonatal population and TSH subpopulation (Kruskall-Wallis)
From: Neonatal heel prick screening TSH concentration in the Netherlands as indicator of iodine status
Total T4 (nmol/L) | p-value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | ||
Total population | 87 (58-126) | 83 (57-118) | 85 (58-120) | 90 (63-127) | 88 (61-125) | 87 (60-123) | 86 (60-122) | 86 (59-122) | 91 (62-128) | χ2 = 40, 8 d.f., p < 0.0001 |
TSH-subpopulation | 64 (48-77) | 62 (46-74) | 64 (47-77) | 68 (52-79) | 66 (50-78) | 65 (49-77) | 65 (49-77) | 65 (48-76) | 68 (51-80) | χ2 = 150, 8 d.f., p < 0.0001 |