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Fig. 3 | BMC Pulmonary Medicine

Fig. 3

From: Efficacy and safety of long-term use of a positive expiratory pressure device in chronic obstructive pulmonary disease patients, a randomized controlled trial

Fig. 3

Primary efficacy and safety outcomes. A Showed the 6MWD at baseline (T0) and two months later (T1) in the intervention group (solid circles) or control group (solid squares). B Showed the Borg-dyspnea score at the end of the 6MWT at baseline (T0) and two months later (T1) in the intervention group (solid circles) or control group (solid squares). C Showed the Borg-fatigue score at the end of the 6MWT at baseline (T0) and two months later (T1) in the intervention group (solid circles) or control group (solid squares). D Showed the PETCO2 at baseline (T0) and two months later (T1) in the intervention group (solid circles) or control group (solid squares). T0 refers to the time when subjects were enrolled. T1 refers to the time when subjects were followed up at 2 months after enrollment. (*: P < 0.05; **: P < 0.001)

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BMC Pulmonary Medicine

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