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Table 1 Lateral and prone position in healthy pregnant women – physiological variables, comfort scores and preferred position

From: The prone position in healthy pregnant women and in women with preeclampsia – a pilot study

Variable Position P value Mean difference 95% confidence interval
  Left lateral Prone    
Systolic blood pressure (mmHg) 112 ± 6.8 110 ± 6.9 0.039 − 2.0 −3.9 to − 0.1
Diastolic blood pressure (mmHg) 70 ± 5.7 72 ± 8.0 0.064 1.9 − 0.1 to 3.8
Mean arterial pressure (mmHg) 84 ± 5.6 85 ± 7.2 0.521 0.6 −1.2 to 2.3
Heart rate (BPM) 75 ± 8.8 85 ± 12.2 < 0.001 10.1 8.0 to 12.2
Respiratory rate (BrPM) 17 ± 2.9 17 ± 3.0 0.347 0.4 −0.4 to 1.2
Oxygen saturation (SpO2%) 98 ± 0.8 98 ± 0.7 0.382 0.1 −0.2 to 0.4
Fetal heart rate (BPM) 137 ± 9.9 138 ± 9.0 0.673 0.6 −2.4 to 3.7
Comfort score 7 (6,8.125) 7 (6,8) 0.873   
Preferred position 29 (58%) 21 (42%)    
  1. Data are mean ± SD, median (quartiles), number of women (%) as appropriate. SpO2 = oxygen saturation obtained by pulse oximetry, BPM = beats per minutes, BrPM = breaths per minute