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Continuous positive airway pressure treatment for sleep apnoea: compliance increases with time in continuing users

Pneumology Unit, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium.

CORRESPONDENCE: T. Pieters, Service de Pneumologie, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Avenue Hippocrate 10, 1200 Brussels, Belgium. Fax: 32 27642831. E-mail: thierry.pieters{at}clin.ucl.ac.be

Keywords: Compliance, continuous positive airway pressure, sleep apnoea syndrome

Received: July 28, 2005
Accepted November 1, 2005

Continuous positive airway pressure (CPAP) remains the best treatment for sleep apnoea syndrome (SAS). In the 1990s, many authors reported on daily compliance, but all of the studies utilised relatively short periods of follow-up that did not exceed a few years.

The mean annual rate of CPAP use in patients with SAS was prospectively recorded. In the current study, the results are presented along with compliance data from patients who started CPAP between 1991 and 1998 and were still using it by the end of 2003. The cohort was chosen in order to obtain 5 yrs of follow-up for each patient. In total, there were 204 patients. For the whole group, mean±SD compliance reached 321±90 and 393±84 min after 1 and 10 yrs, respectively.

There was no significant change in the first 2 yrs, with a significant increase from the third year onwards. Compliance, or its evolution over time, was not correlated either to the baseline polysomnographical data (except slightly for the CPAP pressure), to the difference of these data before and under CPAP therapy, to the age of retirement or to changes in the marital status.

In conclusion, very long-term compliance with continuous positive airway pressure increases by a mean of 8 min·day^–1 per year of follow-up in patients with sleep apnoea syndrome.

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