The reference standard for calculating sensitivity and positive predictive value of tested scoring montages was PSG with bilateral masseter and temporalis muscle EMG traces. EMG = electromyography, PSG = polysomnography, RMMA = rhythmic masticatory muscle activity, 1M = PSG with unilateral masseter muscle EMG trace, 2M = PSG with bilateral masseter muscle EMG traces, 1T = PSG with unilateral temporalis muscle EMG trace, 2T = PSG with bilateral temporalis muscle EMG traces, 1C = PSG with unilateral chin EMG trace, 2C = PSG with bilateral chin EMG traces.