Table 6 Comparison of clinical characteristics in ED, IH and their control groups

Caries (both dentitions)

No

23 (79.3%)

14 (48.3%)

32 (56.1%)

36 (63.2%)

105 (61%)

Yes

6 (20.7%)

15 (51.7%)

25 (43.9%)

21 (36.8%)

67 (39%)

Fisher’s exact

p = 0.014**

p = 0.445

–

McNemar

p = 0.035*

p = 0.556

–

Restorations (fillings due to caries) (both dentitions)

No

21 (72.4%)

15 (51.7%)

29 (50.9%)

28 (49.1%)

93 (54.1%)

Yes

8 (27.6%)

14 (48.3%)

28 (49.1%)

29 (50.9%)

79 (45.9%)

Fisher’s Exact

p = 0.104

p = 0.851

–

McNemar

p = 0.180

p = 1.000

–

Microdont (both dentitions)

No

11 (37.9%)

28 (96.6%)

22 (38.6%)

51 (89.5%)

112 (65.1%)

Yes

18 (62.1%)

1 (3.4%)

35 (61.4%)

6 (10.5%)

60 (34.5%)

Fisher’s exact

p < 0.001**

p < 0.001**

–

McNemar

p < 0.001**

p < 0.001**

–

Infraocclusion (only noted in 1° dentition)

No

21 (72.4%)

28 (96.6%)

36 (63.2%)

53 (93.0%)

138 (80.2%)

Yes

8 (27.6%)

1 (3.4%)

21 (36.8%)

4 (7%)

34 (19.8%)

Fisher’s exact

p = 0.025*

p < 0.001**

–

McNemar

p = 0.039*

p < 0.001**

–

Hypomineralisation (both dentitions)

No

26 (89.7%)

17 (58.6%)

42 (73.7%)

43 (75.4%)

128 (74.4%)

Yes

3 (10.3%)

12 (41.4%)

15 (26.3%)

14 (24.6%)

44 (25.6%)

Fisher’s exact

p = 0.007**

p = 0.830

–

McNemar

p = 0.022*

p = 1.000

–

Hypoplasia (both dentitions)

No

28 (96.6%)

29 (100%)

55 (96.5%)

56 (98.2%)

168 (97.7%)

Yes

1 (3.4%)

0 (0%)

2 (3.5%)

1 (1.8%)

12 (7%)

Fisher’s exact

p = 1.000

p = 1.000

–

McNemar

p = 1.000

p = 1.000

–

Taurodontism (2^o molar teeth only)

No

12 (41.4%)

24 (82.8%)

56 (98.2%)

50 (87.7%)

142 (82.6%)

Yes

17 (58.6%)

5 (17.2%)

1 (1.8%)

7 (12.3%)

30 (17.4%)

Fisher’s exact

p = 0.001**

p = 0.061

–

McNemar

p = 0.004*

p = 0.070

–