Utilisation of more specialist services will be collected, including the type of intervention, and costs will be applied from previous research trials and a current Department of Health funded research project based on a range of specialist providers and intervention types [ 40].
We have a Pulmonary and Cardiac Rehabilitation PPI Advisory group whose members are current and ex-pulmonary and CR patients or interested members of the public who have participated in previous research trials.
Previous research suggests that trial participation rates are lowest among Asian Americans, compared to other groups.
Previous research on clinical trial adaptation by sample size reduction has universally focused on the question of when such reduction should be performed.
Findings from previous research suggest that trial participants find text messaging an acceptable method of data collection, although response rates vary [ 9- 13, 14, 16, 16].
In previous research, female microbicide trial participants and their male partners showed increases in condom use among two months after baseline [ 27], truck drivers in China exhibited increased condom use in follow-up surveys one and two months after baseline [ 11], and men who have sex with men increased their condom use 12 weeks after baseline [ 14].
Previous research using pot trials identified potential alternative herbicides for controlling wildings (Gous et al. 2010a,2010b).
Most resources advise caution in interpreting these investigations, noting their exploratory nature, but when there is a clearly stated rationale, especially when derived from previous research, and sufficient trials are included, a priori planned investigations may improve applicability.
Additionally, there is evidence of an accommodation effect, such that previous research has shown multiple trials of unweighted running are necessary for reliable measures of metabolic cost to be made [21], and this may be the case with biomechanical characteristics too.
This fact is important since previous research has indicated that trials with a small amount of data points can produce erroneous entropy results.
