Diagnostic Accuracy of Periapical Radiography in Detection and Measurement of the External Root Resorption in Primary Molars: A Single-Blind Prospective Clinical Study
Table 5
Descriptive statistics and 95% CIs for the extents of directionless absolute error (mm) on different sides and in different jaws, teeth, and roots. The values are calculated using the unpaired t-test and one-way ANOVAs.
Variable
Absolute error
Factor
N
Mean
SD
95% CI
Min
Max
Side
Observer 1
Right
79
1.52
1.66
1.15
1.89
0.0
8.0
0.492
Left
57
1.72
1.69
1.27
2.17
0.0
5.0
Observer 2
Right
58
1.83
1.70
1.38
2.27
0.0
9.0
0.568
Left
45
2.02
1.73
1.50
2.54
0.0
6.0
Average of both
Right
58
1.64
1.42
1.27
2.01
0.0
6.0
0.232
Left
45
1.99
1.54
1.53
2.45
0.0
5.5
Jaw
Observer 1
Maxilla
36
1.94
1.80
1.33
2.55
0.0
5.0
0.153
Mandible
100
1.48
1.61
1.16
1.80
0.0
8.0
Observer 2
Maxilla
36
2.14
1.62
1.59
2.69
0.0
6.0
0.326
Mandible
67
1.79
1.75
1.37
2.22
0.0
9.0
Average of both
Maxilla
36
2.04
1.42
1.56
2.52
0.0
5.5
0.208
Mandible
67
1.66
1.49
1.29
2.02
0.0
6.0
Tooth
Observer 1
D
106
1.69
1.69
1.36
2.01
0.0
8.0
0.262
E
30
1.30
1.60
0.70
1.90
0.0
5.0
Observer 2
D
83
1.98
1.72
1.60
2.35
0.0
9.0
0.445
E
20
1.65
1.63
0.89
2.41
0.0
5.0
Average of both
D
83
1.82
1.50
1.49
2.15
0.0
6.0
0.696
E
20
1.68
1.41
1.02
2.33
0.0
5.0
Root
Observer 1
MB
45
1.51
1.70
1.00
2.02
0.0
5.0
0.599
ML
29
1.52
1.86
0.81
2.23
0.0
8.0
DB
46
1.76
1.62
1.28
2.24
0.0
5.0
DL
4
0.50
1.00
−1.09
2.09
0.0
2.0
Palatal
12
1.92
1.44
1.00
2.83
0.0
4.0
Observer 2
MB
45
1.67
1.51
1.21
2.12
0.0
5.0
0.267
DB
46
2.22
1.93
1.64
2.79
0.0
9.0
Palatal
12
1.67
1.37
0.80
2.54
0.0
5.0
Average of both
MB
45
1.59
1.39
1.17
2.01
0.0
5.0
0.436
DB
46
1.99
1.61
1.51
2.47
0.0
6.0
Palatal
12
1.79
1.20
1.03
2.55
0.0
4.5
Sex
Observer 1
Female
69
1.78
1.60
1.40
2.17
0.0
5.0
0.204
Male
67
1.42
1.73
1.00
1.84
0.0
8.0
Observer 2
Female
54
1.98
1.74
1.51
2.46
0.0
9.0
0.669
Male
49
1.84
1.68
1.36
2.32
0.0
5.0
Average of both
Female
54
1.88
1.53
1.46
2.30
0.0
6.0
0.525
Male
49
1.69
1.41
1.29
2.10
0.0
4.5
SD, standard deviation; CI, confidence intervals; min, minimum; max, maximum; D, the first molar; E, the second molar; MB, mesiobuccal; ML, mesiolingual; DB, distobuccal; DL, distolingual.
