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Does CPAP therapy affect sleep time in patients with obstructive sleep apnea? A prospective study

Ryo Tachikawa, Takuma Minami, Takeshi Matsumoto, Satoshi Hamada, Kimihiko Murase, Kiminobu Tanizawa, Morito Inouchi, Toru Oga, Michiaki Mishima, Kazuo Chin
European Respiratory Journal 2016 48: PA3423; DOI: 10.1183/13993003.congress-2016.PA3423
Ryo Tachikawa
1Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Takuma Minami
1Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Takeshi Matsumoto
1Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Satoshi Hamada
1Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Kimihiko Murase
1Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Kiminobu Tanizawa
2Respiratory Care and Sleep Control Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Morito Inouchi
2Respiratory Care and Sleep Control Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Toru Oga
2Respiratory Care and Sleep Control Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Michiaki Mishima
1Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Kazuo Chin
2Respiratory Care and Sleep Control Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Abstract

Background: It is currently unknown whether and how treating obstructive sleep apnea (OSA) with continuous positive airway pressure (CPAP) affects habitual sleep time.

Objectives: To investigate the effect of CPAP on habitual sleep time.

Methods: Fifty-seven OSA patients (AHI >20) were prospectively enrolled and were evaluated before and after 3 mo of CPAP. Measurements included polysomnography, habitual sleep on 7 consecutive days assessed by actigraphy with sleep diary, Epworth Sleepiness Scale, and Pittsburgh Sleep Quality Index (PSQI).

Results: Post-CPAP habitual night sleep time did not change compared to the baseline (pre 352 ± 65, post 351 ± 57 min, p = 0.94). The responses to CPAP varied among the participants; sleep time increased by 34 ± 25 min in 27 participants and decreased by 31 ± 29 min in 30. In the exploratory analysis comparing sleep time restorers with non-restorers, the former group was characterized by shorter habitual sleep time (328 ± 68 vs 372 ± 55 min, p = 0.01), more frequent daytime napping (79 vs 40%, p = 0.04), lower sleep efficiency (76.7 ± 10.8 vs 82.7 ± 5.8%, p = 0.01), and higher arousal index (43.5 ± 22.2 vs 34.0 ± 13.9, p = 0.06) in the baseline whereas the latter was associated with more frequent hypnotics use (11 vs 40%, p = 0.02). CPAP mainly improved daytime symptoms (reduced daytime sleepiness and napping) in the sleep time restorers whereas improvements in sleep quality (increased deep sleep and reduced PSQI) were noted in the non-restorers.

Conclusions: CPAP therapy did not prolong habitual night sleep in OSA patients in the entire group. However, responses to CPAP differed among OSA patients with different clinical phenotypes.

  • Sleep disorders
  • Sleep studies
  • Longitudinal study
  • Copyright ©the authors 2016
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Does CPAP therapy affect sleep time in patients with obstructive sleep apnea? A prospective study
Ryo Tachikawa, Takuma Minami, Takeshi Matsumoto, Satoshi Hamada, Kimihiko Murase, Kiminobu Tanizawa, Morito Inouchi, Toru Oga, Michiaki Mishima, Kazuo Chin
European Respiratory Journal Sep 2016, 48 (suppl 60) PA3423; DOI: 10.1183/13993003.congress-2016.PA3423

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Does CPAP therapy affect sleep time in patients with obstructive sleep apnea? A prospective study
Ryo Tachikawa, Takuma Minami, Takeshi Matsumoto, Satoshi Hamada, Kimihiko Murase, Kiminobu Tanizawa, Morito Inouchi, Toru Oga, Michiaki Mishima, Kazuo Chin
European Respiratory Journal Sep 2016, 48 (suppl 60) PA3423; DOI: 10.1183/13993003.congress-2016.PA3423
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More in this TOC Section

  • Feasibility and patient tolerability of transcutaneous electrical stimulation in obstructive sleep apnoea
  • Long term effects of compliance with positive airway pressure (PAP) therapy in patients with obesity hypoventilation syndrome (OHS)
  • The impact of CPAP on circulating IGF-1 in patients with OSAS
Show more 4.2 Sleep and Control of Breathing

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