Table 3.

Adapted spinal canal occupation ratio values in controls and patients.

	Controls		Patients non-stenotic segments		Patients stenotic segments		P
	N	% (median [IQR])	N	% (median [IQR])	N	% (median [IQR])	Controls - patients non-stenotic segments	Controls - patients stenotic segments	Patients non-stenotic - stenotic segments
C2	18	25.7 [22.8–29.8]	72	36.8 [33.4–40.9]	0	na	< 0.01	na	na
C3	18	34.0 [31.4–36.8]	46	47.2 [42.4–51.8]	26	70.8 [58.8–84.7]	< 0.01	< 0.01	< 0.01
C4	18	34.9 [32.6–36.7]	34	51.7 [46.1–56.5]	38	62.7 [53.7–81.0]	< 0.01	< 0.01	< 0.01
C5	18	35.6 [31.5–38.6]	15	51.7 [39.8–55.2]	57	72.5 [59.1–83.6]	0.20	< 0.01	< 0.01
C6	18	29.2 [26.2–34.6]	41	44.5 [35.2–51.3]	29	66.2 [54.8–74.6]	< 0.01	< 0.01	< 0.01
C7	18	22.0 [20.9–25.5]	17	32.2 [29.6–35.4]	0	na	< 0.01	na	na

N, number of measurements; IQR, interquartile range; na, not available. Significant findings are illustrated in bold letters.