Diagnostic Accuracy of Periapical Radiography in Detection and Measurement of the External Root Resorption in Primary Molars: A Single-Blind Prospective Clinical Study

Table 1

Descriptive statistics and 95% CIs for the extents of radiographic resorption estimates (mm) observed by each of the radiograph examiners in the case of each of the extents of actual resorption (mm).

Observer	AR (mm)	N	Mean	SD	95% CI		Min	Max
Observer 1	0 mm	62	1.61	1.74	1.17	2.05	0	5
	1 mm	2	1.50	0.71			1	2
	2 mm	14	2.57	2.14	1.34	3.81	0	7
	3 mm	6	3.00	2.83	0.03	5.97	0	7
	4 mm	9	3.33	2.24	1.61	5.05	0	7
	5 mm	13	3.85	1.77	2.78	4.92	1	6
	6 mm	4	4.50	2.08	1.19	7.81	2	7
	7 mm	24	5.79	1.41	5.19	6.39	3	7
	10 mm	1	7.00
	Total	136	2.95	2.40	2.54	3.36	0	7
Observer 2	0 mm	44	1.77	1.75	1.24	2.30	0	6
	1 mm	2	2.50	0.71			2	3
	2 mm	13	3.23	2.09	1.97	4.49	0	7
	3 mm	5	3.20	2.17	0.51	5.89	0	5
	4 mm	8	3.38	1.85	1.83	4.92	0	5
	5 mm	10	3.50	2.12	1.98	5.02	0	6
	6 mm	4	3.75	1.89	0.74	6.76	1	5
	7 mm	16	4.94	1.57	4.10	5.77	2	7
	10 mm	1	1.00
	Total	103	2.89	2.10	2.48	3.30	0	7

AR, actual resorption; SD, standard deviation; CI, confidence intervals; min, minimum; max, maximum.