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Fig. 3 | BMC Pulmonary Medicine

Fig. 3

From: Evaluation of time courses of agreement between minutely obtained transcutaneous blood gas data and the gold standard arterial data from spontaneously breathing Asian adults, and various subgroup analyses

Fig. 3

Time courses of Bland-Altman analysis indices: the bias and 95% limits of agreement (transcutaneous data were obtained via the chest or forearm sensors, n = 272). Average data from 272 subjects are shown. a Bias and b 1.96SD on PCO2; c bias and d 1.96SD on PO2. The bias on PCO2 was 0.2 mmHg at 4 min (a), and subsequently increased to a plateau of 4.1–4.8 mmHg, which was almost stable between 8 and 30 min. 1.96SD on PCO2 declined over time, with the minimum (6.3 mmHg) observed at 30 min; however, it remained almost constant (6.3–7.5 mmHg) between 12 and 30 min, (b). The bias on PO2 initially decreased, passed the nadir at 5–6 min, and plateaued between 16 and 30 min (c). 1.96SD on PO2 decreased over time, with the minimum (23.1 mmHg) observed at 30 min (d)

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BMC Pulmonary Medicine

ISSN: 1471-2466

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