We performed the univariable analyses using chi-square and Fisher's exact tests to compare differences in use of crowding solutions by ED characteristics and capacity.
Variables associated with cancer in univariable analyses, using a P-value of 0.1 or less, entered the multivariable analysis.
In the univariable analyses, using imputed covariates, cannabis use is associated with lower grade point difference (GPD) in English GCSEs in an approximately dose response fashion (Table 2).
In the univariable analyses, using imputed covariates, tobacco use at age 15 was associated with lower GPD in both English (Table 2) and Mathematics GCSE (Table 3).
Predictors of SNB positivity, RFS and OS were identified by univariable and multivariable analyses using STATA version 9 (StataCorp 2007, College Station, TX, USA).
JCS also predicted the outcome in each of the three subtypes of stroke by univariable analyses.
Baseline, epidemiologic, and treatment variables were initially assessed by univariable analyses.
The association between microbiological properties and demographic and clinical data was assessed by univariable analyses and multiple logistic regression models.
We conducted univariable, bivariable, and multivariable analyses using statistical techniques that account for the complex survey sampling design, using Stata 12.0, and following NCHS guidelines (CDC 2012b).
After variable selection using random forest and univariable mixed logistic regression models, a multivariable analyses using a mixed model with a random effect (center).
