Table 5 The values of the area under the curve (AUC), the cut-off value, sensitivity, and specificity of NC in detecting overweight/obesity in boys and girls according to age
Sex | Age | AUC | p value | cut-off point (cm) | 95% CI | PV +  | PV- | Sensitivity(%) | Specificity(%) |
|---|---|---|---|---|---|---|---|---|---|
Boy | 6 | 0,897 |  < 0,001 |  > 26 | 0,794–0,959 | 94,7 | 90,9 | 81,82 | 97,56 |
7 | 0,829 |  < 0,001 |  > 26,5 | 0,724–0,906 | 69,0 | 84,8 | 85,29 | 68,29 | |
8 | 0,880 |  < 0,0001 |  > 27,4 | 0,775–0,948 | 87,0 | 80,5 | 71,43 | 91,67 | |
9 | 0,943 |  < 0,001 |  > 28,5 | 0,854–0,986 | 95,0 | 86,0 | 76,0 | 97,37 | |
10 | 0,853 |  < 0,001 |  > 28,8 | 0,738–0,931 | 82,1 | 81,2 | 79,31 | 83,87 | |
Total | 6–10 | 0,847 |  < 0,001 |  > 27,9 | 0,805–0,888 | 94,7 | 90,9 | 76,4 | 79,3 |
Girl | 6 | 0,856 |  < 0,0001 |  > 25,5 | 0,747–0,931 | 62,5 | 92,7 | 83,33 | 80,85 |
7 | 0,876 |  < 0,001 |  > 25,7 | 0,791–0,936 | 65,0 | 90,2 | 83,87 | 76,67 | |
8 | 0,910 |  < 0,001 |  > 26,7 | 0,822–0,963 | 90,6 | 84,1 | 80,56 | 92,50 | |
9 | 0,842 |  < 0,001 |  > 26,7 | 0,741–0,915 | 70,6 | 88,4 | 82,76 | 79,17 | |
10 | 0,855 |  < 0,001 |  > 27,8 | 0,738–0,934 | 74,1 | 83,9 | 80,0 | 78,79 | |
Total | 6–10 | 0,851 |  < 0,001 |  > 26,9 | 0,811–0,891 | 73,7 | 82,5 | 70,50 | 84,65 |