TABLE 6—
Traffic Death Rates in States With and Without Specific Legislation in Place Regulating Particular Driving Behaviors: Suicide Rates and State Laws Regulating Handguns, United States, 2013
| Variable | No. | Traffic Death Rate, Mean ±SD or b (95% CI) | pη2 | R2 |
| Seat belt | ||||
| Yes | 34 | 11.80 ±4.60 | 0.55 | |
| No | 17 | 12.51 ±5.20 | ||
| Predictors | ||||
| Population density | 0.001 (–0.001, 0.002) | 0.02 | ||
| % of state below poverty line | 0.220 (–0.219, 0.658) | 0.02 | ||
| % aged > 25 y with college degree | –0.572** (–0.890, 0.253) | 0.23 | ||
| % White | 0.031 (–0.044, 0.106) | 0.02 | ||
| Median age | –0.014 (–0.463, 0.436) | 0.00 | ||
| Seat belt | 1.640 (–0.733, 4.013) | 0.04 | ||
| Hands-free | ||||
| Yes | 19 | 10.54 ±4.90 | 0.53 | |
| No | 32 | 12.93 ±4.56 | ||
| Predictors | ||||
| Population density | 0.000 (–0.001, 0.002) | 0.01 | ||
| % of state below poverty line | 0.189 (–0.259, 0.637) | 0.02 | ||
| % aged > 25 y with college degree | –0.537** (–0.848, 0.216) | 0.21 | ||
| % White | 0.043 (–0.034, 0.121) | 0.03 | ||
| Median age | –0.056 (–0.525, 0.412) | 0.00 | ||
| Seat belt | 0.510 (–1.849, 2.869) | 0.00 | ||
| No texting | ||||
| Yes | 40 | 11.36 ±4.92 | 0.53 | |
| No | 11 | 14.48 ±3.59 | ||
| Predictors | ||||
| Population density | 0.000 (–0.001, 0.002) | 0.01 | ||
| % of state below poverty line | 0.183 (–0.263, 0.630) | 0.02 | ||
| % aged > 25 y with college degree | –0.525** (–0.847, 0.203) | 0.20 | ||
| % White | 0.049 (–0.022, 0.120) | 0.04 | ||
| Median age | –0.078 (–0.522, 0.366) | 0.00 | ||
| Seat belt | 0.888 (–1.631, 3.407) | 0.01 | ||
Note. CI = confidence interval; hands-free = law in place prohibiting the use of hand held cellular phones while driving; no texting = law in place requiring primary enforcement of prohibition of text messaging while driving; seat belt = law in place requiring primary enforcement of seat belt utilization. Statewide suicide rates (total and by firearms) are presented as number of individuals per 100 000. Reference to laws, % of state below poverty line, and population density refer to status and numbers from 2013.
Source. Information on laws was compiled from the Governors Highway Safety Association. Information on suicide deaths was compiled from the Centers for Disease Control and Prevention. Information on poverty and population density was compiled from the US Census Bureau.
**P < .01.