Table 2.
Linear-by-linear association between year and fracture severity
| Classification | Subgroup | No. (%) | Group A | Group B | Group C | p-value |
|---|---|---|---|---|---|---|
| Total | 2,092 (100) | 708 (33.8) | 731 (34.9) | 653 (31.2) | ||
| Presence of combined fracture | No | 1,612 (77.1) | 611 (37.9) | 517 (32.1) | 484 (30.0) | < 0.001* |
| Yes | 480 (22.9) | 97 (20.2) | 214 (44.6) | 169 (35.2) | ||
| No. of combined facial bone fractures | No | 1,612 (77.1) | 611 (37.9) | 517 (32.1) | 484 (30.0) | < 0.001* |
| One | 393 (18.8) | 76 (19.3) | 174 (44.3) | 143 (36.4) | ||
| Two or more | 87 (4.2) | 21 (24.1) | 40 (46.0) | 26 (29.9) | ||
| Fracture type | I | 514 (24.6) | 122 (23.7) | 218 (42.4) | 174 (33.9) | < 0.001* |
| II | 1,106 (52.9) | 497 (44.9) | 329 (29.8) | 280 (25.3) | ||
| III | 300 (14.3) | 66 (22.0) | 110 (36.8) | 124 (41.3) | ||
| IV | 172 (8.2) | 23 (13.4) | 74 (43.0) | 75 (43.5) |
Group A, 2002–2006; group B, 2007–2012; and group C, 2013–2017. Year ranges are expressed as sample number and percent (computed column-wise). The p-values were computed using a linear-by-linear association test, and number (%) values were computed in the total sample or subgroups excluding missing data. The decrease in the incidence of related injuries was statistically significant. The number and severity of facial bone fractures and occurrence of concomitant facial bone fracture were aggravated.
*
p<0.05.