A Cox proportional hazards model was used to calculate HRs for sex, digoxin use and the interaction of sex and digoxin use, controlling for the covariates specified above.
The control model is specified as λ = λ0 = exp(α+Σβjxj) where α and the βj are unknown parameters, xj are the covariates, exp denotes exponential, and the Poisson parameter in cell i with Ti person-years is λiTi where λi is evaluated using the covariates in cell i.
Unless otherwise specified, all simulations were run using the default parameters specified in Table S2.
Use the amount specified in your recipe.
Multivariate linear regression analyses were used to examine the relative effects of parent and grandparent mental health status on mean SDQ scores, after controlling for the family and demographic covariates specified above.
Further covariates (specified in the phenotype file) can also be annotated.
Other secondary variables were analyzed in the PPS using the same mixed model as specified for the primary analysis, with the respective baseline values replacing baseline FEV1 as covariates.
The role of potential covariates was explored using linear regression specified as a two level model (practice and individual) using the software package MLn'.
Table 6 Covariates used to estimate PS using the bivariate Probit Model Covariates Contract Cooperative Coef.
The covariates were specified in the main dialog box; then, a custom category was set as the reference category.
