Table 1.
Demographics and injury pattern characteristics among the four Clusters (Cluster 1, n = 199; Cluster 2, n = 99; Cluster 3, n = 53; and Cluster 4, n = 25).
| Cluster 1 (n = 199) | Cluster 2 (n = 99) | Cluster 3 (n = 53) | Cluster 4 (n = 25) | P-values | |||
|---|---|---|---|---|---|---|---|
| P (1 vs. 2) | P (2 vs. 3) | P (3 vs. 4) | |||||
| DEMOGRAPHICS | |||||||
| Age, yeara | 49.4 ± 1.3 | 47.6 ± 1.8 | 47.5 ± 3.0 | 46.3 ± 4.2 | 0.76 | ||
| Gender, M/F | 134/65 | 70/29 | 36/17 | 20/5 | 0.61 | ||
| Injury severity score (ISS)a | 18.7 ± 0.7 | 22.1 ± 1.1 | 26.0 ± 1.7 | 24.3 ± 2.6 | 0.04s | 0.12 | 0.90 |
| ABBREVIATED INJURY SCALE (AIS) | |||||||
| S1 (head/neck)a | 1.19 ± 0.12 | 1.15 ± 0.18 | 2.09 ± 0.28 | 1.84 ± 0.09 | 1 | 0.02s | 0.95 |
| S2 (face)a | 0.42 ± 0.06 | 0.43 ± 0.09 | 0.36 ± 0.11 | 0.32 ± 0.14 | 0.9 | ||
| S3 (chest)a | 2.17 ± 0.11 | 2.25 ± 0.16 | 2.43 ± 0.26 | 2.16 ± 0.34 | 0.73 | ||
| S4 (abdomen)a | 1.02 ± 0.10 | 1.56 ± 0.15 | 1.64 ± 0.22 | 1.28 ± 0.32 | 0.01s | 0.99 | 0.73 |
| S5 (extremities)a | 1.36 ± 0.09 | 1.90 ± 0.13 | 2.26 ± 0.13 | 1.72 ± 0.27 | 0.003s | 0.31 | 0.27 |
| S6 (external)a | 0.69 ± 0.04 | 0.67 ± 0.06 | 0.70 ± 0.08 | 0.60 ± 0.12 | 0.88 | ||
| BRAIN INJURY | |||||||
| Brain injury, n (%) | 34 (17.1%) | 17 (17.2%) | 19 (35.8%) | 8 (32.0%) | 0.99 | 0.01 s | 0.74 |
a
Values are expressed as mean ± SEM.
One-Way ANOVA or Fisher exact test were used as appropriate with statistical significance set at
s
P < 0.05.