Subash S Heraganahally1,2,3,4,5, Kyi K Zaw1, Sai Tip1,6, Xinlin Jing7, Joy J Mingi4,8, Timothy Howarth4,9, Anil Roy10, Henrik Falhammar11,12,13,14, Dimitar Sajkov2,3,5,15. 1. Department of Respiratory and Sleep Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia. 2. College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia. 3. Northern Territory Medical Program, Darwin, Northern Territory, Australia. 4. Darwin Respiratory and Sleep Health, Darwin private Hospital, Darwin, Northern Territory, Australia. 5. Australian Respiratory and Sleep Medicine Institute, Adelaide, South Australia, Australia. 6. Department of General Practice, Royal Darwin Hospital, Darwin, Northern Territory, Australia. 7. Health Information Services, Royal Darwin Hospital, Darwin, Northern Territory, Australia. 8. Department of Public Health, Charles Darwin University, Darwin, Northern Territory, Australia. 9. College of Health and Human Sciences, Charles Darwin University, Darwin, Northern Territory, Australia. 10. Department of Respiratory and Sleep Medicine, The Queen Elizabeth Hospital, Adelaide, South Australia, Australia. 11. Departments of General Medicine and Endocrinology, Royal Darwin Hospital, Darwin, Northern Territory, Australia. 12. Menzies School of Health Research, Darwin, Northern Territory, Australia. 13. Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden. 14. Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden. 15. Respiratory and Sleep Medicine, Flinders Medical Centre, Adelaide, South Australia, Australia.
Abstract
BACKGROUND: Clinical characteristics of women with different obstructive sleep apnoea (OSA) severity and adherence to continuous positive airway pressure (CPAP) therapy have not been previously explored. AIMS: To assess OSA prevalence, predictors, clinical and polysomnographic (PSG) characteristics and adherence to CPAP therapy among adult Australian women in a retrospective study. METHODS: All female patients who underwent a diagnostic PSG between 2014 and 2015 were included. CPAP adherence was assessed during the study period between 2018 and 2019 using multiple regression models. RESULTS: Among a total of 591 women included in this study (Aboriginal, n = 86), OSA was diagnosed in 458/591 (78%) patients; mild, moderate and severe OSA was present in 44%, 27% and 29% respectively. Older age, higher BMI and hypertension predicted the presence and severity of OSA. The Epworth Sleepiness Scale (ESS) score was not significantly different with (8 (5, 12)) or without (10 (5, 13)) OSA. PSG showed the rapid eye movement (REM) sleep-associated apnoea-hypopnea index (AHI) was higher with all severity of OSA. Adherence to CPAP therapy was noted in 171 (57%) patients; 47% mild, 57% moderate and 63% with severe OSA respectively. Three multiple regression models (clinical, PSG parameters, OSA severity, combined (clinical and PSG)) showed the combined model had the strongest predictive value and demonstrated that higher ESS and more severe oxygen desaturation were associated with CPAP adherence irrespective of OSA severity. CONCLUSIONS: Older age, higher BMI and the presence of hypertension predicted the presence of OSA. The REM sleep-related AHI was higher. Adherence to CPAP was associated with symptomatic OSA and severe oxygen desaturation.
BACKGROUND: Clinical characteristics of women with different obstructive sleep apnoea (OSA) severity and adherence to continuous positive airway pressure (CPAP) therapy have not been previously explored. AIMS: To assess OSA prevalence, predictors, clinical and polysomnographic (PSG) characteristics and adherence to CPAP therapy among adult Australian women in a retrospective study. METHODS: All female patients who underwent a diagnostic PSG between 2014 and 2015 were included. CPAP adherence was assessed during the study period between 2018 and 2019 using multiple regression models. RESULTS: Among a total of 591 women included in this study (Aboriginal, n = 86), OSA was diagnosed in 458/591 (78%) patients; mild, moderate and severe OSA was present in 44%, 27% and 29% respectively. Older age, higher BMI and hypertension predicted the presence and severity of OSA. The Epworth Sleepiness Scale (ESS) score was not significantly different with (8 (5, 12)) or without (10 (5, 13)) OSA. PSG showed the rapid eye movement (REM) sleep-associated apnoea-hypopnea index (AHI) was higher with all severity of OSA. Adherence to CPAP therapy was noted in 171 (57%) patients; 47% mild, 57% moderate and 63% with severe OSA respectively. Three multiple regression models (clinical, PSG parameters, OSA severity, combined (clinical and PSG)) showed the combined model had the strongest predictive value and demonstrated that higher ESS and more severe oxygen desaturation were associated with CPAP adherence irrespective of OSA severity. CONCLUSIONS: Older age, higher BMI and the presence of hypertension predicted the presence of OSA. The REM sleep-related AHI was higher. Adherence to CPAP was associated with symptomatic OSA and severe oxygen desaturation.
Authors: Dorothy F L Sze; Timothy P Howarth; Clair D Lake; Helmi Ben Saad; Subash S Heraganahally Journal: Int J Chron Obstruct Pulmon Dis Date: 2022-04-21
Authors: Arijeet Pal; Timothy P Howarth; Chris Rissel; Raelene Messenger; Siji Issac; Linda Ford; Christine Connors; Subash Heraganahally Journal: BMJ Open Respir Res Date: 2022-08