Table 3 Age-dependent reference intervals for 26 biochemical analytes in newborns
From: Reference intervals for 26 common biochemical analytes in term neonates in Jilin Province, China
Analytes | Age | Lower Limit (90% CI) | Upper Limit (90% CI) |
|---|---|---|---|
Chemistry | |||
 CO2, mmol/L | 1–3 d | 16 (16–17) | 28 (28–29) |
 Cl, mmol/L | 1–3 d | 92 (91–93) | 108 (108–109) |
 K, mmol/L | 1–3 d | 3.3 (3.2–3.4) | 5.4 (5.1–5.6) |
 Na, mmol/L | 1–3 d | 131 (130–131) | 140 (140–141) |
 Ca, mmol/L | 1–3 d | 1.53 (1.42–1.61) | 2.15 (2.12–2.16) |
 Mg, mmol/L | 1–3 d | 0.68 (0.65–0.70) | 0.94 (0.91–0.96) |
 P, mmol/L | 1–3 d | 1.70 (1.64–1.78) | 2.75 (2.68–2.84) |
 Fe, μmol/L | 1 d | 5.2 (4.6–5.9) | 14.6 (12.1–17.2) |
2 d | 6.8 (6.6–7.0) | 15.9 (14.6–17.4) | |
3 d | 6.4 (5.9–7.1) | 18.1 (16.3–19.8) | |
 TIBC, μmol/L | 1–3 d | 32.9 (31.9–35.1) | 52.4 (50.5–55.5) |
 BUN, mmol/L | 1 d | 0.71a | 5.72 (4.58–6.87) |
2 d | 0.71a | 3.77 (3.58–4.23) | |
3 d | 0.71a | 3.55 (2.56–5.04) | |
 Cr, μmol/L | 1 d | 41 (35–47) | 82 (76–87) |
2 d | 38 (37–40) | 76 (72–80) | |
3 d | 31 (29–34) | 65 (60–69) | |
 UA, μmol/L | 1 d | 99 (68–151) | 454 (388–512) |
2 d | 97 (87–110) | 335 (318–351) | |
3 d | 78 (69–88) | 271 (236–300) | |
Enzymes | |||
 ALT, U/L | 1–3 d | 6a | 44 (41–46) |
 ALP, U/L | 1–3 d | 91 (83–103) | 229 (214–240) |
 AST, U/L | 1–3 d | 29 (29–33) | 101 (92–115) |
 CHE, U/L | 1–3 d | 3299 (3272–3397) | 6491 (5838–6736) |
 GGT, U/L | 1–3 d | 42 (39–54) | 302 (280–316) |
 CK, U/L | 1–3 d | 95 (89–109) | 715 (566–773) |
 CK-MB, U/L | 1–3 d | 12 (11–13) | 40 (39–41) |
 LDH, U/L | 1–3 d | 651 (570–720) | 1577 (1524–1620) |
Proteins | |||
 Alb, g/L | 1–3 d | 28 (27–28) | 40 (39–43) |
 TP, g/L | 1–3 d | 41 (40–41) | 59 (57–61) |
Lipids/Lipoproteins | |||
 HDL-C, mmol/L | 1–3 d | 0.43 (0.39–0.46) | 1.13 (1.04–1.19) |
 LDL-C, mmol/L | 1–3 d | 0.20 (0.17–0.22) | 1.48 (1.26–1.76) |
 TCHO, mmol/L | 1–2 d | 1.29a | 2.57 (2.46–3.11) |
3 d | 1.29a | 3.16 (2.96–3.37) | |
 TG, mmol/L | 1–2 d | 0.38 (0.33–0.43) | 1.25 (1.12–1.55) |
3 d | 0.32 (0.22–0.44) | 1.84 (1.66–2.01) | |