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Table 3 Serum IFABP and calprotectin by day of life (DOL) among preterm infants (24–29 weeks gestational age)

From: Normative values for circulating intestinal fatty acid binding protein and calprotectin across gestational ages

 IFABP ng/ml
Median (IQR; max)
Calprotectin ng/ml
Median (IQR; max)
DOL 1–7 (N = 56)0.03 (0.01–1.02; 8.11)1298 (730–2198; 10,056)
DOL 8–14 (N = 8)0.51 (0.02–2.0; 20.70)748 (596–886, 1367)
DOL 15–21 (N = 9)2.07 (1.22–3.95; 7.23)1021 (650–1329; 10,022)
DOL 22–28 (N = 11)1.20 (0.03–2.89; 6.57)784 (552–1808; 3592)
DOL 29–35 (N = 7)2.62 (2.06–3.71; 11.05)428 (345–971; 2043)
DOL 36–42 (N = 8)2.53 (0.59–3.79; 5.06)765 (588–878; 1009)
DOL 43–49 (N = 8)2.48 (2.07–3.31; 3.54)1023 (425–1639; 2528)
DOL 50–60 (N = 12)2.07 (0.97–2.66; 3.19)573 (353–917; 3321)
DOL > 60 (N = 12)1.54 (0.94–3.42; 15)608 (390–847; 2940)