Multivariable Poisson regression analysis of injuries requiring surgical treatment
| Characteristics | Unadjusted | Adjusted* | ||
| RR | 95% CI | RR | 95% CI | |
| Age (n=741) | ||||
| 10 years and more | Reference | Reference | ||
| <1 year | 1.9 | 1.6 to 2.3 | 1.1 | 0.3 to 1.9 |
| 1–5 years | 2.3 | 1.1 to 4.9 | 1.9 | 1.0 to 3.6 |
| 6–9 years | 1.2 | 0.9 to 1.6 | 1.3 | 0.2 to 1.7 |
| Gender (n=741) | ||||
| Male | Reference | Reference | ||
| Female | 0.9 | 0.5 to 1.5 | 0.7 | 0.5 to 1.1 |
| External cause (n=740) | ||||
| Falls | Reference | Reference | ||
| Transport injuries | 1.3 | 0.7 to 2.4 | 0.6 | 0.3 to 1.1 |
| Exposure to inanimate mechanical forces | 0.5 | 0.4 to 0.9 | 0.5 | 0.2 to 0.9 |
| Exposure to smoke, fire, flames, heat/hot substances | 1.3 | 1.1 to 1.6 | 1.5 | 0.3 to 7.5 |
| Others* | 0.9 | 0.6 to 1.2 | 0.6 | 0.3 to 1.5 |
| Mode of transfer (n=680) | ||||
| Private car | Reference | Reference | ||
| Hospital ambulance | 0.9 | 0.6 to 1.6 | 0.64 | 0.28 to 1.46 |
| Royal Omani Police (ROP) ambulance | 0.4 | 0.2 to 1.7 | 0.27 | 0.07 to 1.05 |
| Walk-in, wheelchair | 0.5 | 0.3 to 1.2 | 0.76 | 0.45 to 1.25 |
| Others | 0.9 | 0.4 to 1.8 | 0.73 | 0.52 to 4.06 |
| Hospital admission type (n=740) | ||||
| Primary admission | Reference | – | Reference | – |
| Transferred | 1.2 | 0.6 to 2.1 | 1.4 | 0.8 to 2.6 |
| Hospital | ||||
| National referral centre (Khoula) | Reference | Reference | ||
| Regional referral centre (Nizwa) | 1.1 | 0.6 to 2.1 | 0.4 | 0.2 to 0.8 |
| Emergency Room triage code (n=700) | ||||
| Immediate | Reference | Reference | ||
| 10 min | 2.8 | 0.5 to 15.5 | 0.3 | 0.04 to 3.2 |
| 30 min | 3.3 | 0.6 to 19.3 | 0.4 | 0.1 to 5.1 |
| 90 min | 1.8 | 0.3 to 9.9 | 0.4 | 0.1 to 2.1 |
| 240 min* | 2.7 | 0.4 to 17.3 | – | – |
| Body part (n=721) | ||||
| Extremities | Reference | Reference | ||
| Head, face and neck | 6.2 | 3.4 to 11.5 | 8.8 | 4.9 to 15.3 |
| Thorax | 3.5 | 2.2 to 5.7 | 0.7 | 0.1 to 3.3 |
| Abdomen, back and pelvis | 3.7 | 2.7 to 5.2 | 4.01 | 1.5 to 10.1 |
| Multiple injuries* | 2.7 | 1.4 to 5.2 | 4.9 | 1.5 to 16.3 |
| External* | 4.6 | 3.4 to 6.2 | 5.8 | 1.1 to 29.9 |
| Others | 4.4 | 3.4 to 5.8 | 3.3 | 0.6 to 16.6 |
| Injury Severity Score (n=741) | ||||
| >25 | Reference | Reference | ||
| <10 | 2.4 | 0.4 to 12.9 | 0.3 | 0.03 to 2.3 |
| 10–15 | 14.4 | 1.4 to 148.4 | 4.2 | 0.4 to 42.5 |
| 15–25 | 1.9 | 0.4 to 11.5 | 0.5 | 0.1 to 4.6 |
| Revised Trauma Score (n=297) | 1.2 | 0.5 to 2.7 | 2.9 | 0.9 to 9.5 |
*Bites or exposure to animate mechanical forces, drowning and submersion, accidental suffocation and strangulation, contact with venomous animals and plants, accidental poisoning and exposure to noxious substance, intentional self-harm, assault.