Data derivation from the CPRD also required a very complex analysis; our analyses are robust and the results internally consistent (i.e., with increasing cutoff points for HbA1c, the event probability changed as expected).
While using ROC analysis suggests serum lactate is of moderate predictive value for ICU mortality, applying serial increasing lactate cutoff points and comparing those above and below these points suggests a strong relationship between increasing lactate level and increased risk of ICU mortality.
The objectives of the study were to investigate, in patients with severe nursing home-acquired pneumonia, the diagnostic value of quantitative endotracheal aspirate (QEA) cultures using increasing interpretative cutoff points, as compared with bronchoalveolar lavage (BAL) and protected specimen brush (PSB) quantitative cultures.
Although this increased the negative cutoff point quite considerably in some cases, it would be incorrect to eliminate these samples from the study.
At the initial wage levels, the utility of working in the informal sector increases while the utility of working in the formal sector remains constant, which increases the formality cutoff point for workers (in Eq. 6.1, ( {text{PH}} - {text{HI}} ) increases); hence more individuals would prefer to work in the informal sector.
However, as the cutoff point increased, sensitivity decreased continuously from 98.4%too 18.5%, while specificity increased from 9.4%to91.9%9.4%to91.9%
The first observation from Fig. 2 is the fact that the precision and recall curves do cross as expected, since the precision drops and recall increases as the absolute cutoff point increases, i.e., the considered extracted terms lists becomes less restrictive.
As expected, sensitivity decreased progressively as the cutoff point increased, with a more marked decrease between the ≥4 and ≥5 cutoff points (from 90.0% to 82.5%).
Importantly, for risk of distant metastases and of local relapse, the hazard ratios of the group with high pathological response vs the group with low response decreased as the cutoff point increased (P⩽0.01).
For all studies its sensitivity decreased and its specificity increased as the cutoff points were raised.
However, the prognostic ability of HER2 mRNA expression was lost, suggesting that the increase in the cutoff point is likely to miss the effect of lower, but potentially biologically important mRNA levels of HER2.
