This cut off is based on the knowledge that the differentiated human airway epithelium contains ∼20% basal cells [17], [26] [28], i.e, we expect a basal cell-enriched gene to have a basal cell/differentiated epithelium expression ratio of >5.
* Cut off is based on the median age 64 years.
This cut off was based on the national vaccination coverage estimate of the population aged ≥ 60 years in 2009 (respectively 76%, 77% and 69% [ 26]).
The cut off was based on results of receiver-operating characteristic (ROC) analysis of immunohistochemical scores for the DFI > 300 and DFI < 100 groups.
This cut off is based on MGH-TRD scores seen in primary and secondary care, but short of tertiary care, in the UK NHS [ 65].
The choice of 14 days as cut off was based on reports that there is an increased risk of growth-restriction and adverse outcome in such pregnancies [ 24- 26] and we aimed to study a low-risk population.
This "cut off " was based on the "normal data" derived from autopsy work of Butz [ 10] where by mid to lower third tracheal flattening was commonly found in infants.
Initially, cut-offs were based on the reproducibility of the assay ("technical cutoffs").
These cut-offs were based on published guidelines for assessing AIDS risk that were prevalent during the time these analyses were being conducted.
These cut-offs were based on the levels used for adult populations elsewhere [ 21– 23].
In this study, cut-offs were based on clinical scores which normally includes about 10% of the scores.
