Chest physiotherapy of any type was compared with no chest
physiotherapy. We included trials using traditional chest physiotherapy.
We included trials using mechanical devices which have
the same effect as traditional chest physiotherapy. We considered
the following methods: postural drainage, chest percussion, vibration,
thoracic oscillation, chest shaking, huffing, directed coughing,
thoracic expansion, forced exhalation or expiration techniques
and manual hyperinflation.