Relationship between age and median length of hospital stay, stratified by ISS scores: 0–15, 16–24 and ≥ 25. Age groups combined from 15–44 years due to lack of variation: ISS 0–15 (3, 3 and 3), ISS 16–24 (5, 6 and 6) and ISS ≥25 (9, 10 and 10). Significant increase in LOS from age 65–74 to 75–84 for 0–15 ISS group. Significant decrease in LOS between ages 65–74 to 75–84 for 16–24 and ≥ 25 ISS group. All * p < 0.05.