CSF protein reference values

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Reported reference values for CSF total protein (g/L) in infants, children, and adults.
Age	Mean ± SD^a (range)	Range^b	Mean (range)^c
Term newborn		0.40–1.20		0.63 (0.32–2.40)	0.90¹⁾(0.20–1.70)
0–1 week	0.77 ± 0.16 (0.45–1.09)		0.47 (0.27–0.65)
1–2 weeks				0.67²⁾(0.52–1.20)
2–3 weeks	0.66 ± 0.16³⁾ (0.51–1.01)	0.20–0.80⁴⁾
3–4 weeks				0.52⁵⁾ (0.26–0.88)
1–2 months				0.48 (0.17–0.63)
2–3 months	0.45 +/- 0.13⁶⁾ (0.24–0.65)
3–6 months	0.29 ± 0.04 (0.23–0.37)	0.15–0.45j
6–12 months	0.27 ± 0.07 (0.17–0.35)
1–16 years	0.22 ± 0.05 (0.16–0.31)
a From Statz and Felgenhauer (3). b From Soldin et al. (4). c From Klein and Marcy (5). d Age range, newborn to 1 week.
e Age range, 0–2 weeks.f Age range, 1–4 weeks.g Age range, 0–4 weeks.h Age range, 2–4 weeks.i Age range, 1–3 months.j Age range, 1 month to adult.