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Table 1 Immunoreactive trypsin values (in ng/ml) in newborn screening

From: Differences in immunoreactive trypsin values between type of feeding and ethnicity in neonatal cystic fibrosis screening: a cross-sectional study

Variable Mean (SD) 95% CI Percentile 95 Percentile 99
*Gender:     
Male 21.5(13.7) 21.2-21.8 44.2 68.7
Female 22.8(13.5) 22.5-23.1 47.2 71.2
*Maternal origin:     
Spain 22.2(13.7) 21.9-22.4 45.6 69.3
Africa 24.0(17.2) 23.0-25.1 54.0 94.8
South America 20.8(11.3) 20.1-21.5 41.7 63.6
Rest of Europe 22.3(12.6) 21.5-23.0 45.6 71.6
Asia 20.1(12.1) 18.9-21.4 46.2 69.3
**Maternal age (y):     
<20 23.8(13.2) 22.5-25.1 52.0 73.3
20-40 22.1(13.7) 21.9-22.3 45.7 69.6
>40 22.9(14.2) 21.7-24.2 47.9 70.6
*Gestational age (w):     
<32 25.0(16.7) 23.2-26.8 53.9 83.0
32-37 23.2(11.7) 22.5-24.0 46.6 65.9
>37 22.0(13.8) 21.8-22.3 45.4 69.5
*Feeding methods:     
Natural 22.2(14.3) 21.9-22.4 46.1 71.5
Mixed 21.9(12.0) 21.4-22.4 44.0 62.8
Formula 22.2(12.4) 21.8-22.7 45.3 65.1
Special 53.3(52.9) 29.2-77.4 234.6 nd
*Extraction (d):     
<20 22.2(13.9) 22.0-22.5 46.1 70.3
≥20 15.4(19.8) 10.3-20.6 48.0 nd
  1. *Kruskal-Wallis test (p < 0.001); **Kruskal-Wallis test (p < 0.01).
  2. nd: not determined.
  3. 2012-2013 data for a Spanish region.