Table 3.
Results of logistic regression models predicting mortality for injured persons.
| Characteristic | NASS-GES Fatal crash sample (Original weights) |
NASS-GES Fatal crash sample (Adjusted weights) |
NASS-GES Population-based (Original weights) |
FARS Fatal crash sample (Unweighted) |
FARS Fatal crash sample (Adjusted weights) |
|---|---|---|---|---|---|
| Sample size | 17,737 | 17,737 | 354,557 | 72,768 | 72,768 |
| Population size | 374,026 | 16,051,138 | 18,577,733 | 72,768 | 2,445,019 |
| Baseline odds | 0.352 | 0.000645 | 0.000574 | 0.264 | 0.000630 |
| OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | |
| Age 0–14 | 0.41 (0.34–0.51) | 0.65 (0.52–0.82) | 0.66 (0.52–0.83) | 0.41 (0.38–0.44) | 0.71 (0.67–0.76) |
| Age 40–65 | 1.93 (1.58–2.36) | 1.82 (1.64–2.02) | 1.86 (1.63–2.12) | 1.67 (1.61–1.74) | 1.78 (1.73–1.84) |
| Age 65− | 4.01 (3.05–5.27) | 3.80 (3.19–4.52) | 4.01 (3.41–4.71) | 2.96 (2.77–3.16) | 3.57 (3.40–3.75) |
| Age 80+ | 4.34 (3.38–5.56) | 5.21 (4.13–6.58) | 5.74 (4.68–7.04) | 3.30 (3.02–3.60) | 4.79 (4.49–5.11) |
| Male | 1.29 (1.11–1.49) | 1.56 (1.42–1.73) | 1.49 (1.38–1.61) | 1.36 (1.32–1.41) | 1.57 (1.53–1.62) |
| Pedestrian | 18.27 (12.1–27.5) | 23.82 (19.4–29.1) | 27.81 (23.1–33.5) | 18.46 (16.3–20.9) | 21.96 (20.6–23.4) |
| Motorcyclist | 5.09 (3.60–7.20) | 2.35 (1.96–2.81) | 2.42 (1.97–2.98) | 3.88 (3.66–4.12) | 2.63 (2.52–2.73) |
| Unbelted | 2.52 (1.94–3.28) | 4.14 (3.71–4.62) | 4.34 (3.57–5.29) | 1.92 (1.85–2.00) | 3.58 (3.47–3.69) |
| Ejected | 3.50 (2.67–4.59) | 10.06 (8.71–11.6) | 9.12 (7.62–10.9) | 2.92 (2.75–3.10) | 9.84 (9.41–10.9) |
| High speed | 1.06 (0.93–1.22) | 2.60 (2.34–2.90) | 2.66 (2.20–3.22) | 1.00 (0.97–1.04) | 2.75 (2.68–2.84) |
| Vehicle rolled | 0.84 (0.66–1.06) | 1.34 (1.18–1.51) | 1.37 (1.22–1.54) | 0.97 (0.93–1.01) | 1.37 (1.32–1.42) |
| Severe damage | 1.00 (0.81–1.22) | 3.21 (2.78–3.71) | 3.38 (2.93–3.90) | 1.83 (1.73–1.93) | 3.53 (3.37–3.71) |
| Head-on crash | 0.74 (0.64–0.86) | 2.66 (2.29–3.09) | 2.67 (2.21–3.22) | 0.77 (0.73–0.80) | 2.81 (2.70–2.93) |
| 12PM – 6AM | 1.40 (1.20–1.63) | 1.70 (1.52–1.89) | 1.74 (1.61–1.88) | 1.22 (1.17–1.27) | 1.69 (1.64–1.75) |
| RUCC 4–6 | 1.06 (0.87–1.29) | 1.28 (1.11–1.48) | 1.25 (0.98–1.60) | 1.02 (0.98–1.07) | 1.31 (1.27–1.36) |
| RUCC 7–9 | 1.03 (0.85–1.24) | 1.53 (1.21–1.92) | 1.61 (1.29–2.01) | 1.07 (1.01–1.13) | 1.55 (1.48–1.62) |
OR=Odds Ratio, CI=Confidence Interval, RUCC=Rural-Urban Continuum Code.