Results from nonrandomized comparisons of subgroups defined by their compliance to a policy change should generally be interpreted cautiously, and several biases should be explored.
Success will be defined by "substantial compliance with the agreement," Katz said, adding that prior consent decrees and memorandums of understanding have been effective for measuring compliance.
Two sample t-tests were used to make comparisons between the strata defined by percent compliance.
We used paired t-tests to examine the association between log-transformed urinary creatinine-adjusted phenol concentrations and drinking-container assignment overall and within subsets defined by percent compliance during the intervention phase (≥ median and < the median).
Counts of unused tablets were performed and did not indicate a lack of compliance, defined by >20% of tablets returned on two consecutive visits.
We also analyzed the rate of atrophy according to biological compliance, defined by changes in plasma vitamin concentrations over two years, using the following cut-off values for the two groups.
Analysis of compliance defined by the number of expected doses did not reveal statistically significant differences between compliant and noncompliant populations.
Future studies are required to define the role of intraoperative PEEP in the development of postoperative respiratory complications within subgroups of patients defined by surgical procedure and compliance of the respiratory system.
Other secondary outcomes include changes in serum levels of 25-hydroxyvitamin D, changes in tumoural biomarkers, adherence to the randomised intervention (defined by the proportion of compliance with the randomised intervention out of the total 28 days), renal function and cost utility analyses.
Patients and methods: Virtual patients had ARDS, and were defined by different thoracic and pulmonar compliance, total resistance, lung volumes, pressure volume relation, and pressure and volume recruitment coefficients.
