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Table 1 Characteristics of the 8 to 10-year-old group

From: Oral health-related quality of life in children and adolescents with osteogenesis imperfecta: cross-sectional study

Patients aged between 8 and 10 OI I OI III OI IV Others All
Sociodemographic Characteristics
 Enrolment number – n (%) 26 (46) 16 (29) 11 (20) 3 (5) 56 (100)
  Female 13 (50) 12 (75) 7 (64) 2 (66) 34 (61)
 Age – mean (SD) 9.3 (1.0) 9.2 (0.9) 9.8 (0.5) 9.6 (0.5) 9.4 (0.9)
 Race (White) – n (%) 22 (85) 13 (81) 5 (45) c 3 (100) 43 (77)
  others 4 (15) 3 (19) 6 (55) c 0 (0) 13 (23)
 Insurance status (Private) – n (%) 20 (77) 8 (50) 8 (73) 2 (67) 38 (68)
  Medicare/Medicaid 6 (23) 8 (50) 3 (27) 1 (33) 18 (32)
Pertinent Medical and Physical Conditions
 Family history (Yes) – n (%) 19 (73) a 2 (12) 3 (21) c 3 (100) 27 (48)
 Chronic pain in body (Yes) – n (%) 8 (31) 9 (56) 3 (27) 1 (33) 21 (37)
 Bisphosphonate (Yes) – n (%) 11 (42) 16 (100) 11 (100) 3 (100) 41 (73)
 Wheelchair use (Yes) – n (%) 1 (4) a 14 (88) b 4 (36) c 2 (67) 21 (38)
Oral condition
 DI (Yes) – n (%) 5 (19) a 11 (69) 6 (55) c 0 (0) 22 (39)
 Molar Malocclusion Classification – n (%)
  Cl I 11 (42) 3 (19) 1 (9) 0 (0) 15 (27)
  Cl III 11 (42) 12 (75) 7 (64) 2 (67) 32 (57)
  Cl II & mutilated 4 (16) 1 (6) 3 (27) 1 (33) 9 (16)
  1. Statistical tests determine the significant relationship between categorical variables and OI types I, III and IV: Chi-square test or the Fisher’s exact test for contingency tables with small cell counts; Compare means of a continuous variable between OI types I, III and IV: Welch’s t-test for independent samples. As the sample size is small in each group (n < 15), results have been confirmed by Mann-Whitney U test (non-parametric test)
  2. ap < 0.05 OI type I compared to OI type III
  3. bp < 0.05 OI type III compared to OI type IV
  4. cp < 0.05 OI type IV compared to OI type I