Table 2.

The mean mastoid defect area at the 1st and 2nd CT (cm²).

	1st CT		2nd CT		Mean difference	95% CI	p-value*
	Mean	SD	Mean	SD
Child (N = 18)	1.336	0.834	0.753	0.477	− 0.582	− 0.95 to − 0.22	< 0.001
Adult (N = 4)	2.168	0.376	2.015	0.388	− 0.152	− 0.38 to 0.081	0.068
Total (N = 22)	1.487	0.831	0.983	0.674	− 0.504	− 0.81 to − 0.20	< 0.001
p-value&	< 0.001		0.002		0.166

*p-value of the difference between 1st and 2nd CT; calculated by Wilcoxon-Signed test.

^&p-value of the difference between children and adults; calculated by Mann–Whitney test.

Bold values indicate statistically significant p-values.