Table 2.

Risk estimates of four metabolic components for the survival of digestive tract cancer.

Metabolic components	Studies	ES	95% CI	P	I2	P
Obesity	8	0.93	0.81 to 1.06	0.276	85.7%	< 0.001
Hypertension	11	1.07	0.93 to 1.22	0.342	80.2%	< 0.001
Diabetes mellitus	11	1.51	1.06 to 2.14	0.023	98.0%	< 0.001
Dyslipidemia	7	1.29	0.83 to 1.99	0.256	98.1%	< 0.001

ES, effect size; 95% CI, 95% confidence interval; I², inconsistency index.