Table 2 CGRP concentration in plasma, cerebrospinal fluid, and their ratio

Plasma (pmol/L)

n = 87

n = 47

n = 36

Mean (± SD)

158 (± 86)

154 (± 77)

167 (± 66)

Median (IQR)

144 (90–200)

128 (106–218)

168 (119–216)

Range

42–374

36–348

42–333

CSF (pmol/L)

n = 82

n = 45

n = 31

Mean (± SD)

49 (± 17)

49 (± 13)

47 (± 12)

Median (IQR)

47 (37–58)

48 (41–55)

49 (37–56)

Range

17–110

29–91

19–77

CSF: plasma ratio

n = 72

n = 40

n = 30

Mean (± SD)

0.38 (± 0.20)

0.35 (± 0.17)

0.31 (± 0.15)

Median (IQR)

0.35 (0.23–0.53)

0.33 (0.25–0.39)

0.28 (0.20–0.35)

Range

0.07–1.05

0.12–0.89

0.17–0.88