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

From: Parental perception on oral health-related quality of life and dental features of ectodermal dysplasia and isolated hypodontia in children

Assessment ED (29)
n (%)
ED (29) controls n (%) IH (57)
n (%)
IH controls (57) n (%) Total sample (172) n (%)
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 (2o 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
  1. Significant *p values < 0.05 and the Bonferroni corrected critical ** p values < 0.017
  2. n = Number; (%) = Percentage; 1° = Primary; 2o = Secondary; Both = Primary and Secondary