Table 3

Diagnostic accuracy assessment for acute:chronic 1:3 and 1:4 for each ratio zone (<15th, 15–50th, 50–85th, >85th centiles)

Acute:chronic workloadAcute:chronic workload rangeTrue positive (n)False positive (n)False negative (n)True negative (n)Sensitivity (%) with 95% CISpecificity (%) with 95% CIPostive predictive value (%) with 95% CI
Acute:chronic 1:4<0.601257686318012.2 (6.5 to 20.4)84.7 (83.5 to 85.8)2.0 (1.2 to 3.4)
0.60 to 0.9724132574243124.5 (16.4 to 34.2)64.7 (63.2 to 66.31.8 (1.3 to 2.5)
0.97 to 1.3840129758245940.8 40.0 to 51.2)65.5 (63.9 to 67.0)3.0 (2.1 to 3.8)
>1.382255876319822.5 (14.6to 32.0)85.1 (84.0 to 86.3)3.8 (2.6 to 5.4)
Acute:chronic_1:3<0.591560586327514.9 (8.6 to 23.3)84.4 (83.2 to 85.6)2.4 (1.5 to 3.8)
0.59 to 0.9726136975251125.7 (17.6 to 35.4)63.2 (63.2 to 66.2)1.9 (1.3 to 2.6)
0.97 to 1.4239133562254538.6 (29.1 to 51.2)65.6 (64.1 to 67.1)2.9 (2.2 to 3.6)
>1.422157180330920.8 (13.4 to 30.0)85.2 (84.0 to 86.3)3.5 (2.4 to 5.1)