Table 3.

Relationship between cancer before and after injuries due to automobile accidents

HRs of injuries due to automobile accidents after cancera
	<1 year follow‐up		1–<5 years follow‐up		5–<10 years follow‐up		0–<10 years follow‐up Automobile Accident Injury Cases
	HR	95% CI	HR	95% CI	HR	95% CI	Comparison groupc	Cancer patientsc	HR	95% CI
Overall	1.08	0.91–1.27	0.96	0.89–1.04	0.97	0.88–1.08	6746	6236	1.03	0.98–1.07

ORs of prior injuries due to automobile accidents in cancer cases compared to non‐cancer controlsb
	<1 year prior to cancer		1–<5 years prior to cancer		0–<5 years prior to cancer
	OR	95% CI	OR	95% CI	Controlsc	Cancer Casesc	OR	95% CI
Overall	0.86	0.76–0.96	0.81	0.76–0.87	1519	8403	0.83	0.78–0.88

ORs, odds ratios.

^aModels have been adjusted for race, sex, and number of doctors’ visits, stratified on birth year and cancer registry area. The study populations of the cancer cohort and comparison cohort both excluded subjects with claims prior to baseline for auto accidents based on Medicare claims. Data source is SEER‐Medicare.

^bModels have been adjusted for age, race, sex, number of doctors’ visits, cancer registry area, and selection years. Data source is SEER‐Medicare.

^cNumber of cancer cases or patients/controls or comparison group with automobile accident injuries.