Periapical Lesions and Their Relationship to Schneider’s Membrane in Cone-Beam Computed Tomography

Table 3

Descriptive values of Schneider’s membrane thickness (mm) by sex, age group, and side.

Parameter	Categories	n	Half	95% CI		Median	SD	value
				LL	UL
Sex	Female	567	2,60	2,36	2,84	2,00	2,93	<0.05^a
	Male	409	3,59	3,26	3,92	3,10	3,36
	Total	976	3,01	2,82	3,21	2,50	3,15
Age group	18–36	246	3,10	2,68	3,52	2,75	3,37	0.935^b
	37–48	251	2,97	2,60	3,33	2,70	2,94
	49–59	253	2,75	2,42	3,08	2,50	2,66
	60–86	226	3,27	2,79	3,74	2,00	3,61
	Total	976	3,01	2,82	3,21	2,50	3,15
Side	Right	525	3,18	2,91	3,46	2,70	3,21	0.053
	Left	451	2,81	2,53	3,10	2,20	3,07
	Total	976	3,01	2,82	3,21	2,50	3,15

CI, 95% confidence interval; LL, lower limit; UL, upper limit; SD, standard deviation; based on the ^aMann–Whitney U test; ^bKruskall–Wallis test; significant differences ().