Univariate analysis of intraocular foreign body (IOFB) injury characteristics and the development of endophthalmitis
| Factor | Total no. (%) | Endophthalmitis, no. (%) | P values |
| Sex | 0.383 | ||
| Female | 66 (13.6) | 18 (27.3) | |
| Male | 418 (86.4) | 98 (23.4) | |
| Age (years) | 0.169 | ||
| 0–3 | 40 (8.3) | 14 (35.0) | |
| 4–12 | 283 (58.5) | 75 (26.5) | |
| 13–17 | 161 (33.3) | 27 (16.8) | |
| IOFB material* | 0.001 | ||
| Non-metal | 304 (63.2) | 91 (29.9) | |
| Metal | 177 (36.8) | 25 (14.1) | |
| IOFB location† | 0.701 | ||
| Anterior segment | 164 (34.0) | 41 (25.0) | |
| Posterior segment | 299 (62.0) | 74 (24.7) | |
| Co-existing | 19 (3.9) | 6 (31.6) | |
| Wound location‡ | 0.050 | ||
| Zone I | 311 (65.7) | 75 (24.1) | |
| Zone II | 132 (27.9) | 38 (28.7) | |
| Zone III | 30 (6.3) | 3 (10.0) | |
| Timing of primary repair§ | 0.088 | ||
| ≤24 hours | 296 (61.5) | 63 (21.3) | |
| >24 hours | 185 (38.5) | 53 (28.6) | |
| Timing of IOFB removal¶ | |||
| ≤24 hours | 46 (9.5) | 11 (23.9) | 0.569 |
| >24 hours | 436 (90.5) | 105 (24.1) | |
| Self-sealing of wounds** | 0.776 | ||
| Yes | 78 (19.1) | 23 (29.5) | |
| No | 331 (80.9) | 93 (28.1) | |
| Uveal tissue prolapse†† | <0.001 | ||
| Yes | 249 (54.6) | 32 (12.9) | |
| No | 207 (45.4) | 84 (40.6) | |
| Intraocular hemorrhage‡‡ | <0.001 | ||
| Yes | 220 (49.4) | 16 (7.3) | |
| No | 225 (50.6) | 100 (44.4) | |
| Traumatic lens rupture§§ | 0.022 | ||
| Yes | 377 (82.3) | 104 (27.6) | |
| No | 81 (17.7) | 11 (13.6) | |
*Excluding 3 cases without complete data.
†Excluding 2 cases without complete data.
‡Excluding 11 cases without complete data.
§Excluding 3 cases without complete data.
¶Excluding 2 cases without complete data.
**Excluding 75 cases without complete data.
††Excluding 28 cases without complete data.
‡‡Excluding 39 cases without complete data.
§§Excluding 26 cases without complete data.