Table 1.

The criteria for inclusion and exclusion.

Criteria for inclusion	Criteria for exclusion
Patients with type II diabetes	All kinds of reviews, case reports, or fundamental research works
Research providing accurate risk ratio or odds ratio and 95% confidence intervals	No clear outcome or selected type I diabetes as case outcomes
All kinds of cross-section studies, cohort studies, or case-control studies	Without a control group
Studies are divided into subgroups by the AHI or RDI and the mean AHI (RDI) dose of each subgroup was clearly declared	Used other indicators except AHI/RDI
	No integrated risk ratio or odds ratio