Table 3: Variables of PSG.

Data quality

Light-on-time

Light-off-time

Total Sleep duration

Time in bed

Sleep efficiency

Sleep latency

Wake after sleep onset

Sleep Stage N1% total time asleep

Sleep Stage N2% total time asleep

Sleep Stage N3% total time asleep

Sleep Stage REM % total time asleep

Arousals

Arousal-Index

Obstructive Apnoeas

Mixed Apnoeas

Central Apnoeas

Hypopnoeas

Apnoeas + Hypopnoeas

Apnoea-Index

Hypopnoea-Index

Apnoea-Hypopnoea-Index

Respiratory-Effort-Related-Arousals

Respiratory-Effort-Related-Arousal-Index

Oxygen-Desaturations > 4%