In addition, analysis of covariance was undertaken to adjust for the possible confounding effect of age.
Multivariable linear regression analyses were undertaken to adjust LOS and costs based on patient and hospital characteristics.
In addition to the main analysis, a multiple regression analysis was undertaken to adjust for the potential confounding effects of patient age and gender prior, to assessing the effects of the main trial treatment factors.
A 430-day study was undertaken to evaluate whether adjusting the timing of introduction of feeds with varied protein and energy content could constitute a long-term strategy for steering the quality of Atlantic salmon throughout the entire seawater cycle.
A multivariate logistic regression analysis with backward elimination procedure including all predictors showing a p value ≤ 0.25 in the univariate analysis was undertaken to obtain an adjusted odds ratio (OR) with 95%% confidence interval (CI) and define which variables were independently associated with NIV failure.
Partial correlations were undertaken where appropriate to adjust for the effect of potential confounders (such as age, BMI, fat mass and physical activity level) on relationships between variables.
However, in addition to the unadjusted analysis (t tests), we will also undertake regression analyses to adjust for any imbalance between test treatment groups in patient age or gender.
If a suitable instrumental variable is found, analyses will be undertaken to produce VE estimates adjusted for the measured confounders and the instrumental variable.
To identify possible independent predictors for metastatic infection, multivariate analysis was undertaken using logistic regression to adjust for the presence of confounding variables.
Under logistic regression analysis – undertaken in an effort to adjust for the cranial tomography characteristics, which were unfavourable for pentobarbital – thiopental was more effective than pentobarbital in terms of controlling intracranial pressure (odds ratio = 5.1, 95% confidence interval 1.2 to 21.9; P = 0.027).
Logistic regression was undertaken to calculate odds ratios and to adjust for potential confounding factors and descriptive analysis was carried out to provide frequency distribution.
