Multi-modality of polysomnography signals' fusion for automatic sleep scoring.

•An automatic sleep scoring method was proposed by fusing multi-modality of polysomnography signals.•A discriminative analysis was performed to elucidate multi-modality signals' contributions to automatic sleep scoring.•Different signals’ fusions were compared to demonstrate the validity of multiple signals' fusion.•Four feature selection methods and five classifiers were compared to provide a reference for further study.•Efficacy of the proposed method was confirmed by an open source database.