Sentence examples for as frailty term from inspiring English sources

*Includes consultant surgeon as frailty term (P<0.0001).

Cox proportional hazard fitting, using litter as a frailty term, was performed using Stata®/IC 10.1, 4905 Lakeway Drive, College Station, TX 77845, USA.

Models 1 and 2 give identical estimates, because the Andersen-Gill model estimates the total effect without bias, even without incorporating a frailty term, as discussed above.

Each transition intensity is modelled by a proportional intensities model with a shared frailty term as defined in (4): the baseline intensity corresponds to the one of a Weibull distribution, the random effects follow a Gamma distribution and two covariates are used.

The initial model was developed in SAS v 9.2, with surgeons subsequently included as random effects with the frailty term in R Statistical Software.

In brief, this set of models incorporates a frailty term (a gamma-distributed random effect, as used in negative binomial regression for count data) to describe heterogeneity in disease hazard.

We repeated this analysis by using a frailty term for grids from PM2.5 exposure surface (10 × 10 km) as a random effect.

As per the above model formulation it implies that the variable z i  = exp (u i ) is the frailty term.

The frailty term was assumed to be Gamma distributed.

For simulation run, we estimated two parametric semi-markov models: 1) with specific frailty term in each transition and 2) without frailty term.

The number of previous events (as a quantitative variable) was significantly associated with an increased risk of failure given the frailty term, but was no longer significant after adjustment for the type of failure.