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. 2021 Mar 2;4(3):e210414. doi: 10.1001/jamanetworkopen.2021.0414

Table 2. Respiratory Parameter Measures.

Parameter Participants by group, median (IQR)
Group A Group B
At 15 min At 30 min At 45 min At 60 min At 15 min At 30 min At 45 min At 60 min After walking test
Sao2, % 98.0 (97.3-98.0) 98.0 (98.0-99.0) 98.0 (97.0-98.8) 98.0 (97.5-98.0) 98.0 (98.0-98.0) 98.0 (97.0-98.0) 98.0 (97.5-98.0-) 98.0 (97.0-98.0) 98.0 (97.0-98.0-)
Petco2, mm Hg 33.0 (32.5-35.0) 33.5 (32.3-34.8) 33.0 (32.0-34.0) 32.5 (32.0-34.0) 37.0 (34.0-39.0) 36.0 (34.0-38.0) 36.0 (35.0-37.5) 36.0 (34.0-38.0) 36.0 (35.0-37.5)
PR, pulsations/min 128.5 (113.5-140.0) 128.5 (110.5-140.0) 130.0 (118.5-140.0) 130.0 (116.3-140.0) 90.0 (84.0-103.5) 91.0 (80.0-97.0) 90.0 (85.0-98.5) 99.0 (83.0-102.0) 105.0 (100.0-115.0)
RR, breaths/min 30.0 (28.0-31.5) 31.0 (28.0-33.0) 30.0 (26.5-33.8) 31.0 (26.5-32.0) 20.0 (17.5-24.0) 21.0 (19.0-24.5) 22.0 (20.0-25.0) 24.0 (19.0-26.0) 26.0 (24.0-29.0)
PI, % 3.5 (2.6-4.5) 2.9 (2.4-4.3) 3.8 (2.6-4.8) 3.6 (2.6-4.5) 4.6 (2.9-5.8) 4.3 (2.9-6.5) 4.1 (2.6-6.2) 4.3 (2.8-5.9) 3.5 (2.7-5.0)

Abbreviations: IQR, interquartile range; Petco2, partial pressure of end-tidal carbon dioxide; PI, perfusion index; PR, pulse rate; RR, respiratory rate; Sao2, oxygen saturation.