Entering the Era of Big Data: Getting Our Metrics Right Commentary on: Malhotra et al. Performance of an automated polysomnography scoring system versus computer-assisted manual scoring. SLEEP 2013;36:573-582. Kuna et al. Agreement in computer-assisted manual scoring of polysomnograms across sleep centers. SLEEP 2013;36:583-589. Magalang et al. Agreement in the scoring of respiratory events and sleep among international sleep centers. SLEEP 2013;36:591-596.