Table 2 Descriptive data regarding UMICs with LIRR and without LIRR

Age (mean ± SD)

16.76 ± 4.07

16.29 ± 4.03

-

0.39

Gender

0.60

0.48

 Female

44(23.8%)

141(76.2%)

 Male

24(20.0%)

96(80.0%)

Affected side

0.30

0.68

 Right

43(25%)

129(75%)

 Left

35(21.2%)

130(78.8%)

Canine crown position

10.20

0.006**

 Palatal

34(29.1%)

83(70.9%)

 Buccal

19(13.9%)

118(86.1%)

 Midalveolus

15(29.4%)

36(70.6%)

Mesiodistal location

20.85

 < 0.001***

 S1

89(87.9%)

12(12.1%)

 S2

38(84.4%)

7(15.6%)

 S3

62(73.8%)

22(26.2%)

 S4

19(52.8%)

17(47.2%)

 S5

31(75.6%)

10(24.4%)