Each MBI domain has cut off points established by Maslach [ 8]: for EE ≥27, DP ≥10 and PA ≤10.
Mothers were classified into reference quintiles, defined by cut-off points derived from the Pelotas population distribution of the indicator.
However, all chronic progressive diseases are marked by cut-off points and it is not uncommon for these to vary within a single condition.
Sensitivity and specificity, which were determined by cut-off points, reached 72%84%and80%80% in sensitivity and 80%, 93.3%, 93.3% in specificity, respectively.
When categorised by cut-off points of 0.001, 0.01, and 0.1 W kg−1-year, the adjusted OR for those with cumulative maxSAR-year over 0.1 W kg−1-year as compared with the non-exposed was 0.63 (0.14–2.93) for glioma and 2.72 (0.47–15.98) for meningioma, again indicating no substantial increase in risk.
When categorised by cut-off points of 0.1, 1, and 10 W kg−1-hour, on the other hand, the adjusted OR for the highest vs lowest category increased, although not significantly, to 5.84 (0.96−35.60) for glioma, on the basis of 7 cases (9.1%) and 4 controls (2.7%) in the highest category.
When categorised by cut-off points of 0.001 and 0.01 W kg−1, the adjusted OR for those with mean maxSAR over 0.01 W kg−1 as compared with the non-exposed was 0.87 (0.28–2.75) for glioma and 1.17 (0.40–3.39) for meningioma, indicating no substantial increase in risk.
By adopting a cut off point, the item set can be divided for convenience into two groups – the 'shifting items' which demonstrate improvement beyond a criterion and the 'non-shifting items' that show no change or a deterioration in QOL.
Overall agreement by 10 mm and 15 mm cut off point was 50.5% and 82.1% respectively.
Possible cases were identified by cut-off point = 8/9; Probable cases were identified by cut-off point = 11/12.
Heterogeneity between studies was also explained by cut-off point, SAA assay, and age of included neonates.
