Characteristic | Total Na | Percent of drivers holding phone to earb | Crude Odds Ratio (95% Confidence Limit)c | Adjusted Odds Ratio (95% Confidence Limit)c | P-valued | ||
---|---|---|---|---|---|---|---|
Hand-held phone ban in Northeast drivers | 0.0003 | ||||||
No | 35,126 | 5.9 | 1.00 | (Referent) | 1.00 | (Referent) | |
Yes | 31,483 | 2.6 | 0.53 | (0.39, 0.73) | 0.47 | (0.30, 0.72) | |
Hand-held phone ban in Midwestern drivers | |||||||
No | 60,353 | 5.2 | 1.00 | (Referent) | 1.00 | (Referent) | |
Yes | N/A | N/A | N/A | N/A | N/A | N/A | |
Hand-held phone ban in Southern drivers | |||||||
No | 62,644 | 7.0 | 1.00 | (Referent) | 1.00 | (Referent) | |
Yes | 8484 | 3.7 | 0.54 | (0.44, 0.64) | 0.50 | (0.38, 0.66) | |
Hand-held phone ban in Western drivers | |||||||
No | 25,872 | 7.0 | 1.00 | (Referent) | 1.00 | (Referent) | |
Yes | 39,711 | 2.5 | 0.32 | (0.26, 0.39) | 0.31 | (0.25, 0.38) |