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Table 3 Main results

From: Short-term effects of combining upright and prone positions in patients with ARDS: a prospective randomized study

All patients

Supine

PP 1 h

PP 2 h

PP + UP 1 h

PP + UP 2 h

 

PaO2/FiO2

135 (106-169)a

160 (130-185)

165 (136-192)ab

160 (118-214)

191 (145-256)ab

 

PaCO2

57 (44-67)

59 (48-66)

58 (48-65)

58 (49-69)

57 (51-69)

 

Ctot

28.0 (22.5-40.2)

30.5 (24.0-36.7)

30.0 (24.2-37.0)

28.5 (24.5-34.5)

28.0 (22.5-34.5)

 

Cpulm

52.0 (37.2-80.0)

48.5 (38.5-72.2)

53.5 (35.7-67.7)

48.0 (37.5-64.5)

48.0 (37.5-66.2)

 

Ccw

76.5 (53.0-104.5)

79.5 (56.0-113.0)

79.0 (55.7-111.0)

84.0 (50.5-105.0)

79.0 (45.2-99.0)

 

Group A

Supine

PP 1 h

PP 2 h

PP + UP 1 h

PP + UP 2 h

PP + UP 6 h

PaO2/FiO2

137 (116-208)c

172 (125-234)

170 (123-246)

175 (140-265)

193 (137-293)c

242 (144-289)

PaCO2

62 (50-68)

64 (59-68)

62 (54-68)

65 (56-73)

62 (54-70)

63 (43-75)

Ctot

28.0 (23.0-38.0)

32.0 (22.0-38.0)

30.0 (17.5-38.0)

30.5 (23.0-36.5)

29.0 (23.5-36.0)

34.0 (24.5-41.5)

Cpulm

56.0 (45.0-80.0)

63.0 (45.5-81.0)

62.0 (45.0-77.5)

54.0 (48.0-69.5)

55.0 (46.0-74.0)

62.0 (48.0-85.0)

Ccw

67.0 (39.0-154.0)

65.0 (42.0-121.0)

58.0 (29.0-140.0)

65.0 (42.0-111.5)

59.0 (41.0-116.0)

79.0 (44.0-113.5)

Group B

Supine

PP + UP 1h

PP + UP 2 h

PP 1 h

PP 2 h

PP 6 h

PaO2/FiO2

133 (97-156)d

142 (118-178)

188 (143-213)de

141 (129-178)e

164 (133-186)

164 (132-183)

PaCO2

49 (44-68)

56 (46-68)

53 (44-70)

52 (47-67)

50 (47-59)

56 (49-67)

Ctot

26.0 (22.0-43.0)

28.0 (24.0-33.0)

27.0 (22.0-35.0)

30.0 (24.0-37.0)

31.0 (25.0-37.0)

30.0 (23.0-36.0)

Cpulm

45.0 (31.0-81.0)

40.0 (33.0-63.0)

43.0 (34.0-67.0)

44.0 (37.0-66.0)

44.0 (33.0-68.0)

44.0 (30.0-56.0)

Ccw

77.0 (72.0-100.0)

90.0 (68.0-105.0)

82.0 (73.0-91.0)

80.0 (65.0-113.0)

88.0 (71.0-105.0)

82.0 (70.0-140.0)

  1. Values are expressed as median and IQR.
  2. aSupine versus PP 2 h; P < 0.01; supine versus PP + UP 2 h; P < 0.001;
  3. bPP 2 h versus PP + UP 2 h; P < 0.01.
  4. cSupine versus PP + UP 2 h; p < 0.05;
  5. dSupine versus PP + UP 2 h; p < 0.001;
  6. ePP+ UP 2 h versus PP 1 h; P < 0.05. PP 1 h, PP 2 h, and PP 6 h: 1, 2, and 6 h of prone position. PP+UP 1 h, PP+UP 2 h, and PP+UP 6 h: 1, 2, and 6 h of prone position with additional upright position. Ccw, compliance (chest wall); Cpulm, compliance (lung); Ctot, compliance (total); PP, prone position; UP, upright position.
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