Table 2 Relative risks for gastrointestinal cancers associated with highest cumulative exposures to endotoxin, by lag interval, among women textile workers in Shanghai, China.

Cancer site (cases)	0‐year lag		20‐year lag
	RR (95% CI)*	trend p†	RR (95% CI)*	trend p†
Oesophagus (102)	0.5 (0.2 to 1.2)	0.06	0.4 (0.2 to 0.8)	0.01
Stomach (646)	0.8 (0.6 to 1.1)	0.20	0.7 (0.5 to 0.9)	<0.001
Colon (477)	1.2 (0.8 to 1.6)	0.46	0.8 (0.6 to 1.1)	0.32
Rectum (274)	1.1 (0.7 to 1.7)	0.75	0.6 (0.4 to 1.0)	0.08
Pancreas (180)	0.8 (0.5 to 1.2)	0.12	0.5 (0.3 to 0.9)	<0.001
Liver (360)	0.8 (0.6 to 1.1)	0.25	0.6 (0.4 to 0.9)	0.02

*Relative risk (95% CI) for the highest versus lowest exposure strata, adjusted for age and cigarette smoking.

†Exposure‐response trend p value.