About 4,000 of those cuts, accomplished through layoffs and attrition, have occurred since January.
A potential source of bias is the attrition that has occurred in the cohort [ 8]; however, the earlier null findings [ 1] at age 53 were unchanged when repeated using the current smaller sample.
Though the greatest destruction of country houses has occurred during this century, there has always been a certain rate of attrition.
In spite of efforts to prepare the country militarily, the economy could not sustain a lengthy war of attrition such as had occurred in World War I.
Even greater differences were observed during the fifth and sixth test sessions, although significant attrition through mortality had occurred by this time making the data insufficient for legitimate analyses.
Consequently, it is important to compare the area socioeconomic characteristics of those included and those excluded from analysis to examine if attrition bias may have occurred.
Wesson et al 42 did differ slightly, as it was deemed that attrition bias may have occurred, because, although the authors acknowledged missing data, it may have affected the direction of the results.
Although no statistic analysis was performed to compare litter size among groups, the fact that the litter size was smaller in null mice suggested that the attrition of pups might have occurred.
This hypothesis is supported by bone cysts and attrition frequently occurring synchronously with BMLs [ 88, 138] and incident bone attrition has been strongly associated with the presence of BMLs within the same compartment [ 168].
An interesting hypothesis that nano-sized apatite crystallites occur in the oral cavity during extensive physiological wear of the hierarchical structured enamel surface due to dental abrasion and attrition has been published (Hannig and Hannig 2010).
