To investigate predictors of attrition, time-to-event methods were used.
Moreover, longitudinal surveys are affected by sample attrition over time, though samples are usually refreshed as time goes on and remaining samples can possibly be calibrated in order to reduce potential selectivity bias.
Additionally, a set of exploratory analyses (not shown in this paper) that was conducted to evaluate the probability of attrition over time showed that demographics and health outcomes in the previous time periods (e.g., healthcare costs, disability status and hospitalizations) together explained less than 10% of total variation in attrition in the Medicaid cohort.
Our objective is to examine BTL attrition over time in relation to risk of developing cancer, specifically: 1) How BTL changes with time affect, and are affected by, cancer development and 2) whether BTL measured prior to clinical diagnosis is associated with risk of developing cancer.
Panel studies provide an opportunity to study a rich set of correlates of panel attrition over time.
Using GLIMMIX based on these linearization methods, we derived formulas for power and sample size calculations for longitudinal designs with attrition over time.
It is Michelangelo they are queuing for: the David stands in the light-filled atrium at the end of the museum's sculpture hall, a pampered giant housed here to conserve him from the attrition of time.
When he learned that Bob Pender, a former Drury Lane clown, had a troupe of young knockabout comedians that suffered attrition each time a boy came of military age, he wrote, in the guise of his father, asking that Archibald be taken for training.
That's part of what has led to the increased irritation and attrition this time around.
Most working age individuals file tax returns every year, so attrition over time is quite low relative to longitudinal survey data.
Attrition over time leads to a decrease in the clinical crown heights of patient's teeth and can mask the presence of gingival recession if clinical crown height is used as a measure.
