Relationship between the body position-specific apnea-hypopnea index and subjective sleepiness

Fujio Tanaka, Hiroshi Nakano, Nobuyuki Sudo, Chiharu Kubo

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Background: It is well known that the sleeping position influences the rate of apnea-hypopnea events; however, whether events in one position may have more influence on daytime sleepiness than events in another position has not been thoroughly investigated. Objectives: We retrospectively examined the relationship between the body position-specific apnea-hypopnea index (AHI) and daily sleepiness. Methods: We assessed the sleeping body position, the body position-specific AHI and the Epworth Sleepiness Scale (ESS) in a total of 699 patients who were referred for suspected obstructive sleep apnea-hypopnea syndrome (OSAHS) and underwent diagnostic polysomnography. Results: For all subjects, only the lateral position-specific AHI (L-AHI) showed a weak but significant correlation with the ESS (r = 0.102; p < 0.05). For mild-to-moderate OSAHS patients, there was no correlation between the ESS and the AHI at any position. For severe OSAHS patients, the ESS showed a closer correlation with the L-AHI (r = 0.266; p < 0.001) than with the supine position-specific AHI (S-AHI; r = 0.141; p < 0.05). In a subgroup analysis, divided into positional and non-positional severe OSAHS patients, the correlation coefficients also identified a link between the L-AHI and the ESS. Finally, a multiple linear regression analysis indicated that the ESS was better explained by the L-AHI than by the S-AHI in severe OSAHS patients. Conclusion: The L-AHI is considered to have a stronger influence on daytime sleepiness than the S-AHI in Japanese patients with severe OSAHS.

Original languageEnglish
Pages (from-to)185-190
Number of pages6
JournalRespiration
Volume78
Issue number2
DOIs
Publication statusPublished - Jul 1 2009

Fingerprint

Obstructive Sleep Apnea
Apnea
Polysomnography
Supine Position
Linear Models
Regression Analysis

All Science Journal Classification (ASJC) codes

  • Pulmonary and Respiratory Medicine

Cite this

Relationship between the body position-specific apnea-hypopnea index and subjective sleepiness. / Tanaka, Fujio; Nakano, Hiroshi; Sudo, Nobuyuki; Kubo, Chiharu.

In: Respiration, Vol. 78, No. 2, 01.07.2009, p. 185-190.

Research output: Contribution to journalArticle

@article{33363687c07e486eb16989dd56e2ccdd,
title = "Relationship between the body position-specific apnea-hypopnea index and subjective sleepiness",
abstract = "Background: It is well known that the sleeping position influences the rate of apnea-hypopnea events; however, whether events in one position may have more influence on daytime sleepiness than events in another position has not been thoroughly investigated. Objectives: We retrospectively examined the relationship between the body position-specific apnea-hypopnea index (AHI) and daily sleepiness. Methods: We assessed the sleeping body position, the body position-specific AHI and the Epworth Sleepiness Scale (ESS) in a total of 699 patients who were referred for suspected obstructive sleep apnea-hypopnea syndrome (OSAHS) and underwent diagnostic polysomnography. Results: For all subjects, only the lateral position-specific AHI (L-AHI) showed a weak but significant correlation with the ESS (r = 0.102; p < 0.05). For mild-to-moderate OSAHS patients, there was no correlation between the ESS and the AHI at any position. For severe OSAHS patients, the ESS showed a closer correlation with the L-AHI (r = 0.266; p < 0.001) than with the supine position-specific AHI (S-AHI; r = 0.141; p < 0.05). In a subgroup analysis, divided into positional and non-positional severe OSAHS patients, the correlation coefficients also identified a link between the L-AHI and the ESS. Finally, a multiple linear regression analysis indicated that the ESS was better explained by the L-AHI than by the S-AHI in severe OSAHS patients. Conclusion: The L-AHI is considered to have a stronger influence on daytime sleepiness than the S-AHI in Japanese patients with severe OSAHS.",
author = "Fujio Tanaka and Hiroshi Nakano and Nobuyuki Sudo and Chiharu Kubo",
year = "2009",
month = "7",
day = "1",
doi = "10.1159/000208727",
language = "English",
volume = "78",
pages = "185--190",
journal = "Respiration; international review of thoracic diseases",
issn = "0025-7931",
publisher = "S. Karger AG",
number = "2",

}

TY - JOUR

T1 - Relationship between the body position-specific apnea-hypopnea index and subjective sleepiness

AU - Tanaka, Fujio

AU - Nakano, Hiroshi

AU - Sudo, Nobuyuki

AU - Kubo, Chiharu

PY - 2009/7/1

Y1 - 2009/7/1

N2 - Background: It is well known that the sleeping position influences the rate of apnea-hypopnea events; however, whether events in one position may have more influence on daytime sleepiness than events in another position has not been thoroughly investigated. Objectives: We retrospectively examined the relationship between the body position-specific apnea-hypopnea index (AHI) and daily sleepiness. Methods: We assessed the sleeping body position, the body position-specific AHI and the Epworth Sleepiness Scale (ESS) in a total of 699 patients who were referred for suspected obstructive sleep apnea-hypopnea syndrome (OSAHS) and underwent diagnostic polysomnography. Results: For all subjects, only the lateral position-specific AHI (L-AHI) showed a weak but significant correlation with the ESS (r = 0.102; p < 0.05). For mild-to-moderate OSAHS patients, there was no correlation between the ESS and the AHI at any position. For severe OSAHS patients, the ESS showed a closer correlation with the L-AHI (r = 0.266; p < 0.001) than with the supine position-specific AHI (S-AHI; r = 0.141; p < 0.05). In a subgroup analysis, divided into positional and non-positional severe OSAHS patients, the correlation coefficients also identified a link between the L-AHI and the ESS. Finally, a multiple linear regression analysis indicated that the ESS was better explained by the L-AHI than by the S-AHI in severe OSAHS patients. Conclusion: The L-AHI is considered to have a stronger influence on daytime sleepiness than the S-AHI in Japanese patients with severe OSAHS.

AB - Background: It is well known that the sleeping position influences the rate of apnea-hypopnea events; however, whether events in one position may have more influence on daytime sleepiness than events in another position has not been thoroughly investigated. Objectives: We retrospectively examined the relationship between the body position-specific apnea-hypopnea index (AHI) and daily sleepiness. Methods: We assessed the sleeping body position, the body position-specific AHI and the Epworth Sleepiness Scale (ESS) in a total of 699 patients who were referred for suspected obstructive sleep apnea-hypopnea syndrome (OSAHS) and underwent diagnostic polysomnography. Results: For all subjects, only the lateral position-specific AHI (L-AHI) showed a weak but significant correlation with the ESS (r = 0.102; p < 0.05). For mild-to-moderate OSAHS patients, there was no correlation between the ESS and the AHI at any position. For severe OSAHS patients, the ESS showed a closer correlation with the L-AHI (r = 0.266; p < 0.001) than with the supine position-specific AHI (S-AHI; r = 0.141; p < 0.05). In a subgroup analysis, divided into positional and non-positional severe OSAHS patients, the correlation coefficients also identified a link between the L-AHI and the ESS. Finally, a multiple linear regression analysis indicated that the ESS was better explained by the L-AHI than by the S-AHI in severe OSAHS patients. Conclusion: The L-AHI is considered to have a stronger influence on daytime sleepiness than the S-AHI in Japanese patients with severe OSAHS.

UR - http://www.scopus.com/inward/record.url?scp=68549121076&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68549121076&partnerID=8YFLogxK

U2 - 10.1159/000208727

DO - 10.1159/000208727

M3 - Article

C2 - 19270445

AN - SCOPUS:68549121076

VL - 78

SP - 185

EP - 190

JO - Respiration; international review of thoracic diseases

JF - Respiration; international review of thoracic diseases

SN - 0025-7931

IS - 2

ER -