Table 1.
Linear-by-linear association between year and occurrence of nasal bone fracture by cause
| Variable | Subgroup | No. (%) | Group A | Group B | Group C | p-value |
|---|---|---|---|---|---|---|
| Total | 2,092 (100) | 708 (33.8) | 731 (34.9) | 653 (31.2) | ||
| Traffic accident | Others | 1,636 (78.2) | 519 (31.7) | 585 (35.8) | 532 (32.5) | < 0.001* |
| Traffic accident | 456 (21.8) | 189 (41.4) | 146 (32.0) | 121 (26.5) | ||
| Assault | Others | 1,688 (80.7) | 575 (34.1) | 583 (34.5) | 530 (31.4) | 0.966 |
| Assault | 404 (19.3) | 133 (32.9) | 148 (36.6) | 123 (30.4) | ||
| Fall | Others | 1,687 (80.6) | 573 (34.0) | 630 (37.3) | 484 (28.7) | 0.002* |
| Fall | 405 (19.4) | 135 (33.3) | 101 (24.9) | 169 (41.7) | ||
| Other trauma | Others | 1,265 (60.5) | 457 (36.1) | 395 (31.2) | 413 (32.6) | 0.551 |
| Trauma | 827 (39.5) | 251 (30.4) | 336 (40.6) | 240 (29.0) |
Group A, 2002–2006; Group B, 2007–2012; Group C, 2013–2017. Year ranges are expressed as 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. Odds ratio and 95% confidence intervals were computed in the subsample of cause (others vs. each cause). The decreased tendency of the occurrence of nasal bone fractures caused by traffic accident over time was statistically significant. The incidence of nasal bone fracture in patients who had a fall increased over time.
*
p<0.05.