Table 4.
Distribution of Key Predictors for NASS-CDS Dataset by gender
| Gender | Rao-Scott Chi Square | |||
|---|---|---|---|---|
| F | M | |||
| deltaV (kph), Frontal Impacts | ΔV <15 | 30% | 29% | X2(3)=6.2, p=0.10 |
| 15≤ΔV <30 | 56% | 52% | ||
| 30≤ ΔV <45 | 12% | 16% | ||
| ΔV > 45 | 2% | 3% | ||
| deltaV (kph), Nearside Impacts | ΔV <15 | 47% | 53% | X2(3)=1.61 p=0.66 |
| 15≤ΔV <30 | 44% | 38% | ||
| 30≤ ΔV <45 | 7% | 8% | ||
| ΔV > 45 | 2% | 1% | ||
| deltaV (kph), Farside Impacts | ΔV <15 | 45% | 55% | X2(3)=13.6 p=0.003 |
| 15≤ΔV <30 | 46% | 35% | ||
| 30≤ ΔV <45 | 8% | 8% | ||
| ΔV > 45 | 1% | 2% | ||
| N Quarter Turns (Rollover only) | 1-2 | 56% | 52% | |
| 3-6 | 39% | 44% | ||
| 7-10 | 5% | 4% | ||
| 11-13 | 0% | 0% | ||
| >13 | 0% | 0% | ||
| Age Gp (yrs) | 15-24 | 31% | 31% | X2(4)=4.7, p=0.31 |
| 25-44 | 37% | 37% | ||
| 45-64 | 23% | 22% | ||
| 65-74 | 5% | 5% | ||
| ≥75 | 4% | 5% | ||
| Belt Use | 3-point | 92% | 88% | X2(1)=4.5, p<0.0001 |
| No | 8% | 12% | ||
| Seat Location | Driver | 80% | 86% | X2(1)=59.3, p<0.0001 |
| Passenger | 20% | 14% | ||
| Multiple Severe Impacts | No | 92% | 88% | X2(1)=1.59, p=0.21 |
| Yes | 8% | 12% | ||
| Vehicle Type | Car | 65% | 54% | X2(3)=108.9 p<0.0001 |
| Pickup | 5% | 24% | ||
| Utility | 22% | 16% | ||
| Van | 8% | 6% | ||
| Crash Mode | Farside | 14% | 12% | X2(3)=15.3, p=0.0014 |
| Frontal | 64% | 57% | ||
| Nearside | 13% | 15% | ||
| Rollover | 9% | 16% | ||
| Model Year | 2000-2002 | 35% | 38% | X2(4)=5.3, p=0.15 |
| 2003-2005 | 53% | 47% | ||
| 2006-2008 | 10% | 13% | ||
| 2009-2011 | 2% | 2% | ||
| BMI | BMI < 18.5 | 4% | 1% | X2(4)=240.9, p<0.0001 |
| 18.5≤BMI<25 | 47% | 25% | ||
| 25<BMI≤30 | 31% | 54% | ||
| 30<BMI≤35 | 11% | 14% | ||
| BMI>35 | 7% | 6% | ||
* X2(n): The number n in parentheses refers to the number of degrees of freedom.