Swallow patterns associated with aspiration in COPD: a prospective analysis

Lydia Cvejic; Nadine Guiney; Kenneth K. Lau; Paul Finlay; Kais Hamza; Paul Leong; Martin MacDonald; Paul T. King; Philip G. Bardin

doi:10.1183/23120541.00170-2021

Swallow patterns associated with aspiration in COPD: a prospective analysis

Lydia Cvejic, Nadine Guiney, Kenneth K. Lau, Paul Finlay, Kais Hamza, Paul Leong, Martin MacDonald, Paul T. King, Philip G. Bardin

ERJ Open Research 2021 7: 00170-2021; DOI: 10.1183/23120541.00170-2021

Lydia Cvejic

1Monash Lung and Sleep, Monash Health, Melbourne, Australia

2School of Clinical Sciences, Monash University, Melbourne, Australia

3Hudson Institute and Monash University, Melbourne, Australia

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Nadine Guiney

1Monash Lung and Sleep, Monash Health, Melbourne, Australia

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Kenneth K. Lau

2School of Clinical Sciences, Monash University, Melbourne, Australia

4Diagnostic Imaging, Monash Health, Melbourne, Australia

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Paul Finlay

1Monash Lung and Sleep, Monash Health, Melbourne, Australia

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Kais Hamza

5School of Mathematical Sciences, Monash University, Melbourne, Australia

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Paul Leong

1Monash Lung and Sleep, Monash Health, Melbourne, Australia

2School of Clinical Sciences, Monash University, Melbourne, Australia

3Hudson Institute and Monash University, Melbourne, Australia

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Martin MacDonald

1Monash Lung and Sleep, Monash Health, Melbourne, Australia

2School of Clinical Sciences, Monash University, Melbourne, Australia

3Hudson Institute and Monash University, Melbourne, Australia

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Paul T. King

1Monash Lung and Sleep, Monash Health, Melbourne, Australia

2School of Clinical Sciences, Monash University, Melbourne, Australia

3Hudson Institute and Monash University, Melbourne, Australia

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Philip G. Bardin

1Monash Lung and Sleep, Monash Health, Melbourne, Australia

2School of Clinical Sciences, Monash University, Melbourne, Australia

3Hudson Institute and Monash University, Melbourne, Australia

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For correspondence: philip.bardin@monash.edu

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Tables

TABLE 1

Swallow characteristics for fast-paced drinking in 151 patients with COPD based on presence/absence of aspiration

	Aspiration not detected	Aspiration^# detected	Mean difference (95% CI)
Subjects n	121	30
Timed swallow metrics
Total swallow duration (s)	8.83±4.17	11.07±7.81*	2.24 (0.19–4.29)
Number of swallows to complete task	5.92±2.28	5.60±2.06	0.32 (-0.58–1.22)
Time per swallow (s per swallow)	1.51±0.41	1.90±0.73***	0.39 (0.19–0.59)
Swallow frequency (swallows per s)	0.70±0.16	0.59±0.18***	0.11 (0.04–0.18)
Swallow pattern
Sequential	74 (61)	16 (53)
Mixed	36 (30)	10 (33)
Discrete	11 (9)	4 (13)

Data are presented as mean±sd or n (%), unless otherwise stated. ^#: aspiration score of 6–8 on the penetration–aspiration scale [9]. *: p≤0.05; ***: p≤0.001.

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