Table 3 Prevalence of tooth-size discrepancies of anterior and overall ratio defined as <2 SD or >2 SD by malocclusion, arch form, and gender and results of chi-square tests

Class I

110 (47.8 %)

22 (9.6 %)

P = 0.966

119 (51.7 %)

13 (5.6 %)

P = 0.089

132 (57.4 %)

Class II

24 (10.4 %)

6 (2.6 %)

27 (11.7 %)

3 (1.3 %)

30 (13 %)

Class III

21 (9.1 %)

4 (1.7 %)

19 (8.3 %)

6 (2.6 %)

25 (10.9 %)

Asymmetric

35 (15.2 %)

8 (3.5 %)

41 (17.8 %)

2 (0.9 %)

43 (18.7 %)

Total

190 (82.6 %)

40 (17.4 %)

206 (89.6 %)

24 (10.4 %)

230 (100 %)

Square

50 (21.7 %)

15 (6.5 %)

P = 0.459

58 (25.2 %)

6 (2.6 %)

P = 0.910

64 (27.8 %)

Ovoid

72 (31.3 %)

14 (6.1 %)

77 (33.5 %)

10 (4.3 %)

87 (37.8 %)

Tapered

68 (29.6 %)

11 (4.8 %)

71 (30.9 %)

8 (3.5 %)

79 (34.3 %)

Total

190 (82.6 %)

40 (17.4 %)

206 (89.6 %)

24 (10.4 %)

230 (100 %)

Male

90 (39.1 %)

19 (8.3 %)

P = 0.988

93 (40.4 %)

16 (6.9 %)

P = 0.037*

109 (47.4 %)

Female

100 (43.5 %)

21 (9.1 %)

113 (49.1 %)

8 (3.5 %)

121 (52.6 %)

Total

190 (82.6 %)

40 (17.4 %)

206 (89.6 %)

24 (10.4 %)

230 (100 %)