Abstract
Objectives
Non-invasive positive pressure ventilation (NPPV) improves health-related quality of life (HRQL) in patients with chronic alveolar hypoventilation (CAH). We studied the prognostic impact of HRQL on survival in relation to clinical factors.
Patients
Forty-four patients with CAH due to post-polio (12), scoliosis (11), post-tb (17) or other diagnoses (4) who received nocturnal NPPV were prospectively studied during 6–10 years.
Measurements
Blood gases and HRQL were analysed at baseline and after 9 months and after 8 years. HRQL was evaluated with measures of functioning (SIP), emotional well-being (HADS and MACL), and global QL.
Results
Blood gases and HRQL measures improved during NPPV. The overall 5-year survival rate was 73%. In multivariate survival analysis, a diagnosis of post-polio and low baseline SIP physical index scores, indicating low levels of physical dysfunction, predicted longer survival (P = 0.02, respectively). Similarly, palliation of physical dysfunction and preserved or improved global QL by 9 months were associated with longer overall survival (P = 0.009 and P = 0.001, respectively; multivariate Cox regression).
Conclusion
Seventy-three percent of patients treated for CAH with NPPV survived more than 5 years. Diagnosis and self-rated physical functioning at pre-treatment were related to survival, as were major improvements in physical functioning and global QL during NPPV.
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Abbreviations
- ALS:
-
Amyotrofic lateral sclerosis
- CAH:
-
Chronic alveolar hypoventilation
- CPAP:
-
Continuous positive airway pressure
- HADS:
-
Hospital anxiety and depression scale
- HRQL:
-
Health-related quality of life
- kPa:
-
kilo Pascal
- MACL:
-
The mood adjective check list
- NPPV:
-
Non-invasive positive pressure ventilation
- PaCO2 :
-
Arterial carbon dioxide tension
- PaO2 :
-
Arterial oxygen tension
- QL:
-
Quality of life
- SIP:
-
Sickness impact profile
- SpO2 :
-
Percutaneous oxygen saturation
- Tb sequel:
-
Tuberculosis sequel
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Acknowledgments
The authors would like to thank Prof Sven Larsson, Department of Respiratory Medicine and Allergology, Sahlgrenska University Hospital, for valuable advice. The study was made possible by grants from the Swedish Heart- and Lung Association. Funding sources: the Swedish Heart- and Lung Association, Göteborg University (LUA/ALF). Conflict of interest statement: there exist no actual or potential conflicts of interest between any of the authors and organisations with financial interest in the subject matter
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Olofson, J., Dellborg, C., Sullivan, M. et al. Qualify of life and palliation predict survival in patients with chronic alveolar hypoventilation and nocturnal ventilatory support. Qual Life Res 18, 273–280 (2009). https://doi.org/10.1007/s11136-009-9445-7
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DOI: https://doi.org/10.1007/s11136-009-9445-7