Abstract
Previous studies examining the association of leptin receptor (LEPR) Gln223Arg polymorphism with obstructive sleep apnea-hypopnea syndrome (OSAHS) risk have yielded controversial outcomes. We aimed to clarify whether LEPR Gln223Arg polymorphism was critically involved in the development of OSAHS. We thoroughly searched PubMed as well as CNKI datasets for collection of relevant studies, followed by analysis of odds ratios (ORs) with corresponding 95% confidence intervals (CIs). Of the seven case-control studies we enrolled, there was insignificant correlation ofthe LEPR Gln223Arg polymorphism with OSAHSrisk. However, subgroup analysis by Newcastle-Ottawa scale (NOS) scores revealed that, LEPR Gln223Arg polymorphism was significantly related to OSAHS risk in high-quality studies. In addition, we found no publication bias. Our findings suggest that LEPR Gln223Arg polymorphism might contribute to the risk of OSAHS. Well-designed studies with more subjects are needed for further validation of these results.
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