Clinicians' preference for a lower failure rate for decannulation than extubation may be explained by the fact that tracheostomies are generally an intervention of longer duration than endotracheal intubation.
18 19 Other trials of commercial providers have shown greater weight loss, but these interventions were of longer duration.
Most previous multiple health behavior interventions have been of longer duration (6-12 months) and greater intensity [ 29, 36, 69] than the intervention presented here.
However, the positive effects of the intervention were maintained only during the monitoring and had vanished three months after the interruption of the drug adherence monitoring, suggesting that the intervention should be of longer duration.
17, 18 The benefit of weight loss interventions in type 2 diabetes of longer duration is controversial.
A recent meta-analysis recommended that studies of behavioural and health promotion interventions in SMI need to be of longer duration and with larger sample sizes, as well as assessing whether any effect is maintained [ 73].
Several variables moderated the impact on depression: Interventions were more effective if they were of longer duration, if recruitment was conducted via referral or hospital, if interventions were delivered to people with certain psychosocial problems and on an individual basis, and if the study design was of low quality.
There were some differences at baseline in Haggerty 1988 COD (controls had diarrhoea episodes of longer duration than the intervention group).
The magnitude of behavior changes achieved in this trial was similar to other interventions delivered through different channels (such as telephone) and to those of longer duration.
