Table 3 Prevalence of different types of malocclusion based on demographic characteristics
From: Prevalence of and factors affecting malocclusion in primary dentition among children in Xi’an, China
Variables | Prevalence of malocclusion (present/total) | χ 2 | P | Prevalence of anterior crossbite (present/total) | Prevalence of edge to edge occlusion (present/total) | Prevalence of increased overjet (present/total) | Prevalence of posterior crossbite (present/total) | Prevalence of midline deviation (present/total) | Prevalence of deep overbite (present/total) | Prevalence of open bite (present/total) |
|---|---|---|---|---|---|---|---|---|---|---|
Gender | ||||||||||
Male | 65.49 (776/1185) | 6.58 (78/1185) | 2.36 (28/1185) | 33.33 (395/1185) | 7.26 (86/1185) | 28.10 (333/1185) | 42.45 (503/1185) | 7.26 (86/1185) | ||
Female | 67.24 (706/1050) | 0.766 | 0.382 | 7.05 (74/1050) | 2.57 (27/1050) | 36.86 (387/1050) | 7.90 (83/1050) | 22.19 (233/1050) | 32.10 (337/1050) | 6.67 (70/1185) |
Birth Place | ||||||||||
Urban | 61.59 (935/1518) | 6.06 (92/1518) | 1.84 (28/1518) | 36.96 (561/1518) | 5.47 (83/1518) | 22.86 (347/1518) | 39.26 (596/1518) | 8.17 (124/1518) | ||
Rural | 76.29 (547/717) | 47.078 | <0.001 | 8.37 (60/717) | 3.77 (27/717) | 30.82 (221/717) | 11.99 (86/717) | 30.54 (219/717) | 34.03 (244/717) | 4.46 (32/717) |
Parental education level | ||||||||||
High school and below | 67.81 (394/581) | 8.09 (47/581) | 2.41 (14/581) | 38.55 (224/581) | 7.92 (46/581) | 29.09 (169/581) | 39.93 (232/581) | 8.26 (48/581) | ||
Undergraduate | 64.95 (921/1418) | 5.71 (81/1418) | 2.26 (32/1418) | 31.88 (452/1418) | 6.63 (94/1418) | 22.14 (314/1418) | 34.56 (490/1418) | 5.57 (79/1418) | ||
Graduate and above | 70.76 (167/236) | 3.856 | 0.145 | 10.17 (24/236) | 3.81 (9/236) | 44.92 (106/236) | 12.29 (29/236) | 35.17 (83/236) | 50.00 (118/236) | 12.29 (29/236) |
Familial monthly income (Yuan) | ||||||||||
< 2000 | 77.91 (261/335) | 9.85 (33/335) | 3.28 (11/335) | 47.16 (158/335) | 12.84 (43/335) | 33.43 (112/335) | 52.84 (177/335) | 11.64 (39/335) | ||
2000–5000 | 65.98 (516/782) | 6.01 (47/782) | 2.17 (17/782) | 30.82 (241/782) | 6.01 (47/782) | 17.77 (139/782) | 32.74 (256/782) | 6.27 (49/782) | ||
5000–8000 | 57.97 (389/671) | 4.92 (33/671) | 1.34 (9/671) | 25.93 (174/671) | 6.11 (41/671) | 22.95 (154/671) | 28.02 (188/671) | 4.02 (27/671) | ||
> 8000 | 70.69 (316/447) | 44.937 | <0.001 | 8.72 (39/447) | 4.03 (18/447) | 46.76 (209/447) | 8.50 (38/447) | 36.02 (161/447) | 48.99 (219/447) | 9.17 (41/447) |