Table 5 Independent effects of headache on AmpStd in migraine subjects from a linear model

(Reference)^a

(−1.04 ± 0.10)

–

(− 0.92 ± 0.08)

–

Migraine within last 60 days (n = 28)

−0.45 ± 0.16

0.004

−0.08 ± 0.12

0.994

Migraine within last 2 weeks (n = 24)

− 0.64 ± 0.14

< 0.001

−0.65 ± 0.14

< 0.001

Migraine within last week (n = 19)

− 0.80 ± 0.10

< 0.001

−0.57 ± 0.08

< 0.001

Triptan use (n = 13)

0.45 ± 0.10

0.006

0.49 ± 0.07

< 0.001

Other headaches (n = 2)

2.39 ± 0.25

< 0.001

−1.16 ± 0.14

< 0.001

Female gender (n = 22)

0.06 ± 0.10

1.000

0.41 ± 0.08

< 0.001

Age (dB per decade)^b

−0.28 ± 0.03

< 0.001

− 0.14 ± 0.02

< 0.001