Aggregating studies that have used different methods of data collection and somewhat variable timeframes for headache (during the last year or less), the present survey indicates that more than 50% of the population in Europe are current headache sufferers, and almost 15% suffer from migraine.
This concept can be expanded to include countries, new variables and timeframes, and novel statistical techniques (e.g., using time series or cross sectional data).
The interrelated nature of treatment processes and outcomes and the variable and often long timeframe of change are becoming recurrent themes in research papers in these areas [ 14- 18].
Some models already display significant differences in climate variables within the past timeframe for Denmark.
Marked heterogeneity in this estimate was not significantly explained by selected study design variables (use of outpatient sample, timeframe prior to study over which pain was assessed) or sample demographic variables (mean Expanded Disability Status Scale, mean disease duration, proportion of female sex, and proportion with progressive MS).
The one that is used most frequently is the need for dialysis post-transplantation, although the specified timeframe in which dialysis occurs is variable.
The HS did not capture the length or frequency of flares, as this is highly variable by patient, and the standard 10 year timeframe for the TTO exercise did not reflect the variation in actual survival between HS.
It would also be more efficient, as the timeframe for a reentry training program (variable from program to program) is substantially shorter than for training new physicians from scratch.
Statistical validation of the performance of the generator will be made for all key variables and across multiple timeframes.
The models can be used to estimate productivity and total carbon sequestration (i.e. above-ground + below-ground biomass) under a continuous range of planting designs (e.g. variable proportions of trees and shrubs or plant densities), timeframes and future climate scenarios.
Similarly, Intention to Leave timeframes were combined to form the dichotomous variable Intention to Leave (2 to 5 years) or Stay (10 or more years).
