Effect of cervical manipulation on vertebral artery and cerebral haemodynamics in patients with chronic neck pain: a crossover randomised controlled trial

Table 5

Order effect on vertebral artery haemodynamics

	Order by position interaction	Neutral—cervical manipulation	Neutral—max rotation	Cervical manipulation—max rotation
	F_2,24, p value	t₁₂, p value	t₁₂, p value	t₁₂, p value
Velocity (cm/s) ipsilateral	0.70, 0.51	−0.17, 0.87	1.01, 0.33	1.01, 0.33
Velocity (cm/s) contralateral	4.33, 0.02	−2.23, 0.045	−0.69, 0.51	2.47, 0.030
Flow (mL/s) ipsilateral	0.11, 0.90	−0.03, 0.98	0.40, 0.70	0.39, 0.70
Flow (mL/s) contralateral	0.06, 0.95	0.24, 0.81	0.37, 0.72	0.08, 0.93