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Table 3 Proportion (%) new-borns with TSH = 1 mIU/L in heel prick blood by laboratory and calendar year and by age at heel prick screening 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 78.74 85.66 84.54 74.08 76.38 75.45 77.37 75.17 75.47 < 0.0001
 Tilburg 83.84 81.77 74.96 78.16 78.52 69.46 55.27 39.9 44.21 < 0.0001
 Capelle 76.16 78.85 77.18 73.29 72.56 69.99 57.71 40.6 48.98 < 0.0001
 Bilthoven 80.02 84.64 80.02 73.87 78.36 69.11 52.84 43.25 50.72 < 0.0001
 Amsterdam 43.2 39.04 55.11 48.78 65.2 75.85 72.76 62.55 36.25 < 0.0001
Age
 day 3 71.27 74.62 74.77 66.58 69.64 67.69 59.02 47.00 49.81 < 0.0001
 day 4 72.71 75.73 74.76 69.55 73.08 69.79 60.21 48.97 50.30 < 0.0001
 day 5 74.19 76.27 76.37 71.59 76.04 73.57 64.05 51.89 51.92 < 0.0001
 day 6 72.08 72.00 70.72 66.78 75.46 75.66 67.33 55.27 50.41 < 0.0001
 day 7 61.44 52.78 65.08 59.22 79.39 73.92 65.44 51.93 44.94 0.0004