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 language | English |
|---|---|
| Pages (from-to) | 185-190 |
| Number of pages | 6 |
| Journal | Respiration |
| Volume | 78 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jul 1 2009 |
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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 journal › Article
}
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 -