Table 5.

MRI findings of craniocervical obstructions with comparison to the Wakayama spine study by Teraguchi et al. (24).

	Female participants (number of)					Male participants (number of)
	Our study		Wakayama study			Our study		Wakayama study
Age	No obstr.	Obstr.	No obstr	Obstr.	*Stat.diff.	No obstr.	Obstr.	n:o	No obstr.	Stat. diff
<50	18	57	63	24	p < 0.01	5	3	28	10	n.s
50–59	1	24	59	57	p < 0.01	1	4	31	28	n.s
60–69	0	7	72	86	P < 0.05	0	3	22	43	n.s
70–79	0	2	48	124	n.s	0	0	17	72	n.s
>79	0	0	17	101	n.s.	0	0	10	63	n.s.
All	19	90	259	392	p < 0.01	6	10	108	216	n.s

^*Statistical difference between groups using Fischer exact test.