Table 1.

Correlation and linear regression for state-level Google relative search volume and cancer incidence from 2004 through 2013.

CDCa cancer term	Google cancer term	Correlation test		Linear regression with year included
		Spearman rs	Spearman P value	Coefficient (95% CI)	P value	R2
Breast	Breast cancer	.18	.001	.12 (0.06 to 0.19)	<.001	.05
Prostate	Prostate cancer	–.27	<.001	.07 (–0.08 to 0.22)	.38	.47
Lung and bronchus	Lung cancer	.33	<.001	.39 (0.33 to 0.46)	<.001	.28
Colon and rectum	Colon cancer	–.02	.67	.14 (0.11 to 0.17)	<.001	.56
Corpus and uterus, NOSb	Uterine cancer	.40	<.001	.09 (0.07 to 0.12)	<.001	.16
Leukemias	Leukemia	.13	.003	.02 (0.01 to 0.03)	.001	.03

^aCDC: Centers for Disease Control and Prevention.

^bNOS: not otherwise specified.