TABLE 1

Comparison of the Effect of Sleep Position on Sleep, Arousal, Awakenings, and Apneas in the Cohort Overall (n = 24)

VariableSupineProneP
Recording time, min159 (115–192)163 (134–206).52
Sleep time, min116 (62–154)146 (103–190).0001
Sleep efficiency, %72.5 (54–88.4)89.5 (76.9–94.6)<.0001
Active sleep, %79.6 (52.2–92.8)70.7 (59.1–91.2).004
Quiet sleep, %15.5 (7.2–23.9)25.8 (8.8–37.5).0001
Indeterminate sleep, %3.7 (0–26.3)2.6 (0–26.9).03
Awakenings9.7 (3.0–14.5)3.5 (2.3–9.3).0003
Arousals13.6 (7.5–20.8)8.7 (5.2–18.0)<.0001
Central apneas2.2 (0–67.1)5.6 (0.2–22.6).04
Obstructive apneas0.9 (0–5.8)0.5 (0–5.8).007
Mixed apneas4.4 (0–12.7)1.9 (0–18.4).05
  • Data are expressed as median (range). Awakenings, arousals, and apneas are all number per hour.