All adjusted proportions and Cox-regression models were controlled for propensity score as well as several additional prespecified covariates.
Despite these limitations, the coefficient for ultrasound receipt was still significantly different from zero (P = 0.032) when controlling for propensity score quartile.> -wrap-foot> Logistic regression analysis of propensity score quartiles and use of real-time ultrasound guidance as predictors of any complications of tracheostomy.
These analyses will also control for the propensity to receive an initial prescription.
We will test for differences in rates using fixed effects conditional Poisson regression models, controlling for the propensity score and residual imbalances among important covariates.
Assessments were conducted and measured uniformly between treatment groups, and through control of the baseline HRQoL covariates and use of the random-effects model, the analysis incorporated and controlled for the propensity to respond in a certain way.
We assessed ad exposure to non-tobacco products to control for the propensity to be receptive or attentive to advertising in general, which could confound the relation between tobacco-specific advertising exposure and smoking behaviour.
To improve comparability of the 2 vaccine groups, we controlled for the propensity score in multivariate models, but first we excluded all outlier observations ("trimming"), defined as those below the lower 2.5% of the tail of the TIV observations (3,355 observations) and above the upper 2.5% tail of the ATIV observations (2,894 observations).
To obtain random controls for testing the propensity of interacting proteins to be regulated by sc-miRNAs, we generated a cluster set by randomly shuffling miRNAs among clusters, while keeping the size of each cluster unchanged.
16 A final sample of 84,130 patients in the pneumonia cohort and 383,448 patients in the control cohort were included for propensity score matching (PSM).
When individual complications were studied, it was found that the caesarean section group had a relative risk of 5.6 for post-partum haemorrhage compared with the control group, after adjusting for propensity score and the relative indications for caesarean section (Table 3).
