Table S7.

Comparisons of crash rate between two genders within each city in years 2007 and 2008

		Chesapeake					Virginia Beach
Year	Gender	Drivers	Crashes	Crash Rate	Difference	p-value	Drivers	Crashes	Crash Rate	Difference	p-value
2007	Male	4584	335	0.073	0.007	0.263	7280	636	0.087	0.025	< 0.001
	Female	3731	298	0.080			5738	642	0.112
2008	Male	4355	278	0.064	0.002	0.783	6725	559	0.083	0.014	0.007
	Female	4104	269	0.066			6191	600	0.097