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Table 1 Phenotype Definitions

From: Distinct polysomnographic and ECG-spectrographic phenotypes embedded within obstructive sleep apnea

Phenotype Phenotype criteria
Polysomnogram chemoreflex Central apnea index ≥ 5/h of sleep
Spectrogram chemoreflex Presence of narrow band elevated low frequency coupling
Polysomnogram fragmentation—SE Sleep efficiency ≤ 70% total sleep time
Polysomnogram fragmentation—N1 NREM N1 ≥ 30% total sleep time
Polysomnogram fragmentation—WASO Wake after sleep onset ≥ 60 min
Spectrogram fragmentation High frequency coupling ≤ 30% total sleep time
Polysomnogram consolidation—SE Sleep efficiency ≥ 90% total sleep time
Polysomnogram consolidation—N1 NREM N1 ≤ 10% total sleep time
Polysomnogram consolidation—WASO Wake after sleep onset ≤ 30 min
Spectrogram consolidation High frequency coupling ≥ 50% total sleep time
  1. SE sleep efficiency; N1 NREM stage 1; WASO wake after sleep onset