Prevalence and Morphology of C-Shaped Canals: A CBCT Analysis in a Korean Population
Table 3
The distribution of classification types according to age.
Age
, (%)
C1, (%)
C2, (%)
C3a, (%)
C3b, (%)
c4, (%)
18–20
113 (100)
63 (55.8)
14 (12.4)
13 (11.5)
14 (12.4)
9 (8)
21–30
402 (100)
153 (38.1)
86 (21.4)
72 (17.9)
77 (19.2)
14 (3.5)
31–40
134 (100)
49 (36.6)
36 (26.9)
22 (16.4)
23 (17.2)
4 (3)
41–50
124 (100)
31 (25)
33 (26.6)
24 (19.4)
34 (27.4)
2 (1.6)
51–60
72 (100)
17 (23.6)
12 (16.7)
17 (23.6)
23 (31.9)
3 (4.2)
61+
69 (100)
10 (14.5)
13 (18.8)
12 (17.4)
26 (37.7)
8 (11.6)
Total
914 (100)
323 (35.3)
194 (21.2)
160 (17.5)
197 (21.6)
40 (4.4)
value
18–20 vs. 21–30
0.001
0.045
0.140
0.127
0.075
18–20 vs. 31–40
0.004
0.008
0.358
0.385
0.144
18–20 vs. 41–50
<0.001
0.010
0.138
0.007
0.044
18–20 vs. 51–60
<0.001
0.549
0.048
0.002
0.474
18–20 vs. 61+
<0.001
0.331
0.369
<0.001
0.580
21–30 vs. 31–40
0.837
0.234
0.793
0.701
1.000
21–30 vs. 41–50
0.011
0.275
0.817
0.065
0.447
21–30 vs. 51–60
0.026
0.451
0.329
0.022
1.000
21–30 vs. 61+
<0.001
0.748
1.000
0.001
0.008
31–40 vs. 41–50
0.061
1.000
0.651
0.067
0.751
31–40 vs. 51–60
0.081
0.139
0.285
0.024
0.966
31–40 vs. 61+
0.002
0.275
1.000
0.002
0.032
41–50 vs. 51–60
0.964
0.156
0.600
0.610
0.533
41–50 vs. 61+
0.127
0.299
0.886
0.189
0.008
51–60 vs. 61+
0.245
0.907
0.481
0.590
0.184
To compare total sample ratios between age groups, the 2-sample proportion test was performed. A value < 0.05 was considered to indicate statistical significance.
