More specifically, information on monthly volumes of different health services was collected for the 12 months prior to the initiation of the HIV/AIDS programs until December, 2009 (up to 36 months of follow-up for the clinics with the longest intervention time).
This is particularly suggested in case of large displacement, long trauma to intervention time (15 days or more) or poor bone quality.
While the first focus is autism, with the aim of trying to shrink intervention times to improve long term outcomes for children — given what Vaughan describes as a "well-documented" link between earlier intervention and better autism outcomes — the intent is to address other behavioral conditions too, in time, such as ADHD.
Moreover, as with many other public health interventions, the long time frame between intervention and effect is a major barrier to assessing the long term effectiveness of interventions, although judicious use of modelling may help at least to look at potential cost effectiveness of interventions if different levels of effect are achieved.
The challenges of sustaining preventive interventions over the long time periods necessary for primary prevention of cancer have been thoroughly described by Zelen (1988).
Bakermans-Kranenburg et al [ 23] stress the need for long-term follow-up studies, since sleeper effects – effects that emerge a long time after the intervention – on for example attachment security might otherwise remain undetected.
The optimal interval from failure to intervention (hereafter 'failure-to-intervention-time') is not well defined, as only a small number of studies have assessed the impact of failure-to-intervention-time on short- and long-term patency rates.
It has been known for a long time that lifestyle intervention programs are successful for the treatment of patients with manifested T2DM.
These studies suggest that there is a small select group of patients with isolated liver metastases from colorectal cancer who may live a long time without surgical intervention.
The design with a long follow-up time, large intervention and control groups with reasonable sample attrition may be considered to be among the strengths of this study.
