Table 2.
The frequency distribution of number of cases, mean, standard deviation (SD) and standard error of the mean (SEM) of tooth eruption age (years) of boys and girls according to tooth types
| Tooth number |
Boys (n = 520) |
Girls (n = 521) |
All (n = 1041) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of cases | Mean | SD | SEM | No. of cases | Mean | SD | SEM | No. of cases | Mean | SD | SEM | |
| 11 |
69 |
6.3 |
0.8 |
0.3 |
48 |
6.1 |
2.1 |
0.9 |
117 |
6.2 |
1.5 |
0.5 |
| 12 |
63 |
8.5 |
2.1 |
0.5 |
57 |
7.1 |
0.9 |
0.3 |
120 |
7.4 |
1.2 |
0.4 |
| 13 |
143 |
10.9 |
1.2 |
0.2 |
72 |
9.4 |
1.2 |
0.3 |
215 |
10.4 |
1.4 |
0.2 |
| 14 |
57 |
9.6 |
1.1 |
0.3 |
46 |
9.1 |
1.4 |
0.5 |
103 |
9.4 |
1.2 |
0.3 |
| 15 |
42 |
10.0 |
1.0 |
0.4 |
26 |
9.6 |
1.3 |
0.5 |
68 |
9.8 |
1.2 |
0.4 |
| 16 |
30 |
6.0 |
1.4 |
0.4 |
25 |
5.0 |
0.2 |
0.1 |
55 |
5.4 |
0.9 |
0.4 |
| 17 |
49 |
10.8 |
1.0 |
0.5 |
32 |
10.5 |
1.3 |
0.5 |
81 |
10.6 |
1.2 |
0.3 |
| 21 |
67 |
6.3 |
1.5 |
0.3 |
49 |
6.2 |
0.4 |
0.2 |
116 |
6.2 |
0.8 |
0.3 |
| 22 |
65 |
8.4 |
1.4 |
0.5 |
51 |
7.2 |
1.0 |
0.3 |
116 |
7.8 |
1.3 |
0.3 |
| 23 |
139 |
10.6 |
1.2 |
0.2 |
66 |
9.1 |
1.0 |
0.2 |
205 |
10.0 |
1.3 |
0.2 |
| 24 |
59 |
9.5 |
1.3 |
0.4 |
50 |
9.4 |
1.3 |
0.4 |
109 |
9.4 |
1.3 |
0.3 |
| 25 |
49 |
9.3 |
1.8 |
0.3 |
33 |
10.5 |
1.0 |
0.5 |
82 |
9.8 |
1.5 |
0.5 |
| 26 |
30 |
6.7 |
2.0 |
0.4 |
26 |
5.5 |
1.0 |
0.5 |
56 |
6.3 |
1.8 |
0.5 |
| 27 |
50 |
11.2 |
3.2 |
0.6 |
32 |
11.0 |
1.2 |
0.4 |
82 |
11.1 |
2.0 |
0.5 |
| 31 |
44 |
6.0 |
0.9 |
0.2 |
21 |
5.5 |
2.7 |
0.9 |
61 |
5.7 |
2.1 |
0.5 |
| 32 |
62 |
5.7 |
0.5 |
0.2 |
43 |
6.6 |
0.8 |
0.3 |
105 |
6.1 |
6.1 |
0.2 |
| 33 |
72 |
10.0 |
1.7 |
0.4 |
58 |
10.0 |
2.5 |
0.9 |
130 |
10.0 |
2.0 |
0.4 |
| 34 |
55 |
10.0 |
1.7 |
0.5 |
45 |
9.1 |
1.0 |
0.3 |
100 |
9.4 |
1.3 |
0.3 |
| 35 |
35 |
10.5 |
1.0 |
0.1 |
23 |
10.3 |
1.1 |
0.4 |
58 |
10.4 |
1.1 |
0.3 |
| 36 |
44 |
5.8 |
1.2 |
0.3 |
34 |
5.3 |
0.5 |
0.2 |
78 |
5.5 |
0.8 |
0.3 |
| 37 |
85 |
11.5 |
1.7 |
0.4 |
63 |
6.1 |
2.1 |
0.9 |
148 |
6.2 |
1.5 |
0.5 |
| 41 |
43 |
7.0 |
0.2 |
0.1 |
34 |
7.1 |
0.9 |
0.3 |
77 |
7.4 |
1.2 |
0.4 |
| 42 |
67 |
5.8 |
0.5 |
0.3 |
43 |
9.4 |
1.2 |
0.3 |
110 |
10.4 |
1.4 |
0.2 |
| 43 |
73 |
10.2 |
1.2 |
0.3 |
55 |
9.1 |
1.4 |
0.5 |
128 |
9.4 |
1.2 |
0.3 |
| 44 |
55 |
9.9 |
1.7 |
0.5 |
47 |
9.6 |
1.3 |
0.5 |
102 |
9.8 |
1.2 |
0.4 |
| 45 |
29 |
11.0 |
1.2 |
0.5 |
28 |
5.0 |
0.2 |
0.1 |
57 |
5.4 |
0.9 |
0.4 |
| 46 |
46 |
6.2 |
1.3 |
0.2 |
39 |
10.5 |
1.3 |
0.5 |
85 |
10.6 |
1.2 |
0.3 |
| 47 | 89 | 11.4 | 1.1 | 0.4 | 65 | 6.2 | 0.4 | 0.2 | 157 | 6.2 | 0.8 | 0.3 |