Table 2.

Median PGE₂ concentrations over time independent of migraine phase.

Group	[T0]	[T1]	[T2]
GTN responders	0.044 (0.02–0.10)	0.053 (0.03–0.10)	0.049 (0.03–0.08)
GTN non-responders	0.052 (0.01–0.09)	0.031 (0.01–0.07)	0.040 (0.02–0.07)
Controls	0.044 (0.02–0.08)	0.043 (0.03–0.09)	0.060 (0.03–0.09)

Values are the uncorrected medians of absolute concentrations in ng/mL with their interquartile range.

[T0] = baseline, [T1] = ∼140 min after the start of GTN infusion, [T2] = ∼320 min after GTN infusion. GTN responder, migraine patients who responded to GTN; GTN non-responder, migraine patients who did not respond to GTN. GTN, glyceryl trinitrate.