TABLE 1.
Descriptive Statistics Summary for All Adult Drivers (≥ 16 Years) Using a 3-Point Safety Belt System and Not Ejected From the Vehicle During the Crash: National Data, United States, 1998–2008
| Descriptive Statistics | All Drivers, Mean (95% CI) or %a (95% CI) | Male Drivers, Mean (95% CI) or %a (95% CI) | Female Drivers, Mean (95% CI) or %a (95% CI) |
| Occupant | |||
| Age, y | 36.50 (36.04, 36.96) | 36.35 (35.77, 36.93) | 36.66 (36.17, 37.15) |
| Senior drivers (> 60 y) | 11.14 (9.99, 12.29) | 11.47 (10.00, 12.95) | 10.78 (9.67, 11.88) |
| Male sex | 52.67 (51.00, 54.35) | … | … |
| Stature, cm | 171.36 (170.79, 171.92) | 177.81 (176.90, 178.73) | 164.21 (163.60, 164.80) |
| Mass, kg | 76.34 (75.43, 77.25) | 83.92 (83.29, 84.54) | 67.95 (66.17, 69.74) |
| Body mass indexb | |||
| Underweight (< 18.5 kg/m2) | 12.40 (9.16, 15.65) | 10.41 (6.04, 14.78) | 14.61 (12.39, 16.83) |
| Normal body type (≥ 18.5 but < 25 kg/m2) | 41.17 (38.76, 43.58) | 35.70 (33.23, 38.16) | 47.18 (43.98, 50.38) |
| Overweight (≥ 25 but < 30 kg/m2) | 29.92 (27.45, 32.39) | 37.32 (32.57, 42.07) | 21.77 (20.24, 23.30) |
| Obese (≥ 30 kg/m2) | 16.50 (14.44, 18.57) | 16.58 (15.36, 17.79) | 16.44 (11.74, 21.14) |
| Vehicle | |||
| Type | |||
| Passenger car | 67.48 (63.90, 71.06) | 61.41 (54.18, 68.63) | 74.23 (72.62, 75.83) |
| SUV | 14.78 (12.70, 16.86) | 14.19 (11.84, 16.53) | 15.45 (13.10, 17.80) |
| Van (including minivans) | 6.49 (5.57, 7.42) | 6.05 (5.43, 6.68) | 6.98 (5.24, 8.72) |
| Light truck | 11.25 (8.65, 13.84) | 18.35 (13.27, 23.43) | 3.35 (2.34, 4.35) |
| Vehicle age at crash, y | 6.09 (5.88, 6.30) | 6.35 (6.16, 6.54) | 5.80 (5.54, 6.06) |
| Crash | |||
| Delta-V (total), km/h | 19.68 (19.26, 20.10) | 19.54 (18.79, 20.29) | 19.83 (19.22, 20.45) |
| Crash direction | |||
| Frontal crash | 2.58 (2.20, 2.97) | 2.68 (2.08, 3.29) | 2.47 (1.79, 3.16) |
| Side crash | 42.71 (39.52, 45.91) | 41.19 (38.22, 44.16) | 44.37 (39.60, 49.15) |
| Rear crash | 22.87 (21.12, 24.62) | 21.35 (18.92, 23.78) | 24.58 (22.33, 26.83) |
| Rollover (≥ 1 roof inversion) | 6.65 (5.00, 8.29) | 7.56 (5.75, 9.36) | 5.63 (3.94, 7.31) |
| Airbag deployed in crash | 36.34 (33.10, 39.59) | 36.17 (30.98, 41.36) | 36.55 (34.58, 38.53) |
| Posted speed limit | |||
| ≤ 56 km/h | 2.60 (1.98, 3.21) | 2.80 (2.00, 3.59) | 2.37 (1.61, 3.13) |
| > 56 km/h but < 105 km/h | 83.20 (75.93, 90.46) | 81.24 (72.08, 90.40) | 85.40 (79.91, 90.90) |
| ≥ 105 km/h | 14.21 (7.38, 21.03) | 15.96 (7.54, 24.39) | 12.23 (6.96, 17.49) |
| Injury | |||
| Fatality | 0.31 (0.21, 0.42) | 0.29 (0.22, 0.36) | 0.33 (0.12, 0.55) |
| Maximum AIS (whole body) | |||
| 1 | 87.56 (85.58, 89.27) | 87.44 (86.36, 88.52) | 87.66 (84.65, 90.67) |
| 2 | 8.50 (6.98, 10.02) | 8.30 (7.52, 9.07) | 8.66 (5.98, 11.34) |
| 3 | 2.68 (2.40, 2.96) | 2.74 (2.26, 3.22) | 2.63 (2.14, 3.12) |
| 4 | 0.55 (0.40, 0.70) | 0.66 (0.49, 0.83) | 0.46 (0.29, 0.63) |
| 5 | 0.26 (0.20, 0.31) | 0.34 (0.26, 0.43) | 0.19 (0.15, 0.24) |
| 6 | 0.06 (0.04, 0.08) | 0.08 (0.05, 0.11) | 0.04 (0.02, 0.06) |
| Head injury (AIS 2+) | 1.55 (1.21, 1.89) | 1.52 (1.28, 1.76) | 1.58 (1.02, 2.14) |
| Chest injury (AIS 2+) | 1.17 (0.90, 1.44) | 1.10 (0.86, 1.34) | 1.25 (0.81, 1.68) |
| Spine injury (AIS 2+) | 0.56 (0.35, 0.76) | 0.54 (0.34, 0.75) | 0.58 (0.36, 0.79) |
Notes. AIS = Abbreviated Injury Scale; BMI = body mass index; CI = confidence interval. Weighted frequency = 23 234 794; for categorical variables, the estimates are percentage of cases corresponding to the value indicated in the first column.
a
Estimates are reported as mean and percentage values for continuous and categorical variables, respectively.
b
The BMI classification is based on the National Institutes of Health guidelines.11