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Table 4 Proportion (%) new-borns with nTSH >5 mIU/L in heel prick blood by laboratory and calendar year and by age at heel prick sampling and calendar year (both Cochran-Mantel-Haenzel test)

From: Neonatal heel prick screening TSH concentration in the Netherlands as indicator of iodine status

  2007 2008 2009 2010 2011 2012 2013 2014 2015 p-value
Laboratory
 Zwolle 0.45 0.67 0.50 0.93 0.73 0.72 0.48 0.62 0.55 0.8723
 Tilburg 0.38 0.55 0.71 0.87 0.69 0.96 0.93 0.69 0.78 0.0018
 Capelle 0.44 0.63 0.72 0.97 0.80 0.96 0.77 0.69 0.78 0.0450
 Bilthoven 0.46 0.50 0.81 0.96 0.78 0.69 0.81 0.91 0.76 0.0157
 Amsterdam 1.40 1.59 1.55 2.44 1.41 1.31 0.96 1.14 2.58 0.3723
Age
 day 3 0.81 1.13 0.97 1.7 0.62 0.95 0.89 0.99 1.28 0.8156
 day 4 0.8 0.9 1.01 1.35 1.09 1.01 1.02 0.91 1.16 0.0681
 day 5 0.54 0.7 0.71 0.85 0.67 0.91 0.5 0.78 0.93 0.0529
 day 6 0.47 0.55 0.92 1.41 0.65 0.73 0.58 0.5 0.94 0.4966
 day 7 0.15 0.76 0.64 1.33 1.02 0.89 0.36 0.77 1.1 0.029