Table 2 Descriptive statistics of the measured physiological parameters in different sleeping positions
From: The effect of sleeping position on heart rate variability in newborns
Supine (S) | Supine with tilt (ST) | Prone with tilt (PT) | Prone (P) | p valuea | p valueb | |
|---|---|---|---|---|---|---|
Arterial blood oxygen saturation (%); Median (IQR) | 97,0 (96,0-98,3) | 97,0 (96,0-98,0) | 96,0 (96,0-97,5) | 96,0 (95,0-97,0) | p = 0,001 | S vs ST = 0,847 ST vs PT = 0,009* PT vs P = 0,037* S vs P = 0,004* S vs PT = 0,014* ST vs P = 0,001* |
Heart rate (/min) Median (IQR) | 136,5 (122,3-145,0) | 134,0 (128,0-143,0) | 132,5 (124,0-141,3) | 130,0 (120,0-138,0) | p = 0,238 | NS |
Breathing frequency (bpm) Median (IQR) | 47 (44–50) | 47 (45–50) | 45 (43–49) | 45 (42,0-47,5) | p = 0,001 | S vs ST = 0,039* ST vs PT = 0,001* PT vs P = 0,045* S vs P = 0,001* S vs PT = 0,025* ST vs P = 0,001* |
Systolic arterial pressure (mmHg) Median (IQR) | 71,0 (62,8-78,3) | 73,0 (68,5-82,0) | 72,0 (66,0-79,0) | 72,0 (67,0-80,0) | p = 0,334 | NS |
Diastolic arterial pressure (mmHg) Median (IQR) | 42,5 (37,5-46,0) | 45,0 (40,0-50,0) | 41,0 (37,0-46,5) | 44,0 (40,0-50,0) | p = 0,637 | NS |
Mean arterial pressure (mmHg) Median (IQR) | 51,0 (47,0-57,0) | 54,0 (49,5-59,5) | 52,0 (47,3-54,0) | 54,0 (48,0-60,0) | p = 0,179 | NS |
Temperature (°C) Mean (SD) | 36,6 ± 0,04 | 36,6 ± 0,04 | 36,6 ± 0,04 | 36,6 ± 0,04 | NS |