Table 2.

Scores (degrees) obtained for the flexion rotation test (FRT) and the global active cervical range of motion for individuals with chronic migraine, episodic migraine, and headache-free women.

	Chronic Migraine (n = 25)	Episodic Migraine (n = 30)	Headache-free (n = 30)	Mean differences (95%CI). Effects Sizes
	Mean (95%CI)	Mean (95%CI)	Mean (95%CI)	CM × EM	CM × HF	EM × HF
Right FRT	26 (23; 28)*,a,#,b	33 (31; 36)*,a	41 (39; 45)	−7° (−13°; −3°) 1.13	−15° (−21°; −11°) 2.08	−8° (−13°; −4°) 1.09
Left FRT	27 (24; 30)*,a,#,b	32 (30; 34)*,a	40 (38; 43)	−5° (−10°; −1.5°) 0.87	−13° (−20°; −12°) 1.89	−8° (−12; −5°) 1.32
Flexion	50 (45; 55)*,a	54 (50; 57)	58 (55; 62)	−4° (−9°; 4°) 0.31	−8° (−15°; −1°) 0.79	−4° (−13°; 5°) 0.50
Extension	59 (54; 64)*,a	65 (60; 70)	72 (68; 7)	−6° (−14°; 2°) 0.45	−13° (−20°; −4°) 1.15	−7° (−15°; −3°) 0.54
Right Lateral flexion	33 (30; 36)*,a	35 (33; 37)	37 (34; 39)	−2° (−6°; 2°) 0.42	−4° (−9°; −0.2°) 0.62	−2° (−6°; 4°) 0.30
Left Lateral flexion	33(30; 36)*,a	36 (34; 38)	39 (36; 41)	−3° (−7; 1°) 0.57	−6° (−10°; −2°) 0.86	−3° (−4°; 6°) 0.38
Right Rotation	58 (54; 61)*,a	61 (58; 64)*,a	67 (64; 70)	−3° (−7°; 3°) 0.37	−9° (−15°; −4°) 1.15	−5° (−9°; −6°) 0.86
Left Rotation	54 (50; 59)*,a	58 (55; 62)	62 (58; 65)	−4° (−9°; 3°) 0.41	−8° (−13°; −2°) 0.72	−6° (−9°; 5°) 0.35

Abbreviations: 95%CI, confidence interval of 95%; CM, chronic migraine group; EM, episodic migraine group; HF, headache-free group.

^*p < 0.05 compared to headache-free group;

^#p < 0.05 compared to episodic migraine.

^aClinically relevant factors determined using the headache-free group as a reference. Chronic migraine MIDs: FRT = 6.9°, flexion = 5.2°; extension = 5.4°; lateral-flexion = 6.5°, rotation = 8.6°. Episodic migraine MIDs: FRT = 6.01°, flexion = 4.8°, extension = 6.1°, lateral-flexion = 6.6°, rotation = 7.6°.

^bClinically relevant factors when comparing chronic and episodic migraine. MIDs: FRT = 5.4°, flexion = 5.6°; extension = 6.5°; lateral-flexion = 5.9°, rotation = 8.5°.