This study therefore seeks to quantify, through an established approach based on data simulation [ 22, 26- 28], differences in the estimate (bias) and precision of treatment effect and associated statistical power through using either ANOVA or CSA in relation to the unbiased estimate of treatment effect by ANCOVA, in differing hypothetical trial scenarios.
It gains precision by borrowing strength from the common variance assumption, but it retains flexibility in allowing for differing between-trial variances.
Many trials have addressed the timing issues, but they have differed in trial design as well as the chemotherapy regimen used as reviewed recently by Socinski and Stinchcombe (2007).
Males paired in trials differed in their standard length by 0.1 1.5 cm and in the red dorsal fin area by 0.4 21.9%.
Hb levels considered eligible for inclusion in a study differed across trials.
The current knowledge of preventive nutrition on CVD risk was mainly derived from various observational and clinical trials differing in study design, sample size and ethnic groups.
19 27 29 43 47 49 Total programme costs adjusted for years survived or living in the community differed between the trials: one trial showed no cost difference between intervention and usual care, 19 and five trials showed cost differences that were not significant.
Confidence ratings for correct item recognition for both constituents did not differ between trials in which only item memory was correct and trials in which item and associative memory were correct.
For example: Patients in the proposed trial have a disease, condition, or severity level that is different from that of the patient population used for instrument development and validation Patients in the proposed trial differ in age, gender, race, or developmental or life stage from those for instrument development and validation An instrument is altered in item content or format.
Because trichoid sensilla were chosen at random on the antenna, the choice of sensillum and location of the recording electrode in the sensillum also differed between trials.
