Table S1 The characteristics and correlation of age distributions in different etiology groups
Etiology Age
＜12Y 12-18Y 18-40Y 40-60Y ≥60Y Total
BA 8 28 63 11 5 115
EBA 1 14 204 92 12 323
MCA 4 15 157 99 16 291
AMA 14 13 144 96 25 292
FAG 34 19 131 82 38 304
FFH 41 9 97 52 12 211
AR 2 4 124 99 7 236
Total 104 102 920 531 115 1772
Abbreviations: BA, bicycle accident; EBA, electric bicycle accident;
MCA, motorcycle accident; AMA, automobile accident; FAG, fall at ground levels; FFH, fall from heights; AR, assault-related.
The chi-square statistic was computed to provide a P value, set at P＜ 0.05.
Table S2 The characteristics and correlation of gender distributions in different etiology groups
Etiology Gender
Male Female Ratio of M to F Total
BA 65 50 1.3:1 115
EBA 234 89 2.63:1 323
MCA 238 53 4.49:1 291
AMA 218 74 2.95:1 292
FAG 231 73 3.16:1 304
FFH 170 41 4.15:1 211
AR 210 26 8.08:1 236
Total 1366 406 3.36:1 1772
Abbreviations: BA, bicycle accident; EBA, electric bicycle accident;
MCA, motorcycle accident; AMA, automobile accident; FAG, fall at ground levels; FFH, fall from heights; AR, assault-related.
The chi-square statistic was computed to provide a P value, set at P＜ 0.05.
Table S3 The characteristics and correlation of the distributions of maxilloface-fracture types in different etiology groups
Etiology
Types of maxillofacial fractures
Mandible fracture
Maxilla fracture
Zygomatic bone complex fracture
Isolated zygomatic arch fracture
Nasal-orbital- ethmoid complex
fracture
Isolated nasal bone fracture
Alveolar bone fracture
Frontal bone fracture
Panfacial fracture
BA 89 15 19 5 2 0 10 0 6
EBA 94 36 215 17 7 5 17 5 28
MCA 166 110 128 18 26 1 22 17 75
AMA 74 36 62 1 20 0 14 12 103
FAG 184 22 55 38 12 3 28 3 16
FFH 152 43 51 10 7 0 26 6 42
AR 107 38 43 30 10 8 14 7 9
Total 866 300 573 119 84 17 131 50 279
Abbreviations: BA, bicycle accident; EBA, electric bicycle accident;
MCA, motorcycle accident; AMA, automobile accident; FAG, fall at ground levels; FFH, fall from heights; AR, assault-related.
The chi-square statistic was computed to provide a P value, set at P＜ 0.05.
Table S4 The characteristics and correlation of the distributions of concurrent injuries in different etiology groups
Position
Yes No Cranium Four
limbs Chest Abdomen Spine Ocular region
BA 13 5 6 0 2 1 25 90
EBA 26 21 18 0 2 30 80 243
MCA 82 48 38 0 12 46 152 139
AMA 105 66 64 14 23 39 182 110
FAG 18 20 17 0 3 14 63 241
FFH 41 70 43 2 11 15 120 91
AR 26 9 13 0 2 29 59 177
Total 311 239 199 16 55 174 681 1091
Abbreviations: BA, bicycle accident; EBA, electric bicycle accident;
MCA, motorcycle accident; AMA, automobile accident; FAG, fall at ground levels; FFH, fall from heights; AR, assault-related.
The chi-square statistic was computed to provide a P value, set at P＜ 0.05.
