Table 2.

Performance of the recommended definition for identifying elevated BP

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Kappa coefficient*
All participants	90.9	100	100	98.1	0.94
Sex
Male	95.5	100	100	98.7	0.97
Female	81.1	100	100	97.7	0.88
Age
13 y	79.9	100	100	97.1	0.87
14 y	85.5	100	100	97.7	0.91
15 y	94.8	100	100	99.0	0.97
16 y	94.2	100	100	98.5	0.96
17 y	94.8	100	100	98.6	0.97
Height percentiles among male aged 13 y
<25	40.0	100	100	92.4	0.54
25~	71.4	100	100	94.5	0.81
50~	80.0	100	100	97.2	0.88
≥75	100	100	100	100	1
Height percentiles among male aged 14 y
<25	64.7	100	100	94.3	0.76
25~	96.8	100	100	99.3	0.98
50~	86.8	100	100	96.8	0.91
≥75	97.8	100	100	99.5	0.99
Height percentiles among male aged 15 y
<25	95.8	100	100	99.1	0.97
25~	100	100	100	100	1
50~	100	100	100	100	1
≥75	100	100	100	100	1
Height percentiles among male aged 16 y
<25	93.6	100	100	98.1	0.96
25~	100	100	100	100	1
50~	100	100	100	100	1
≥75	100	100	100	100	1
Height percentiles among male aged 17 y
<25	95.3	100	100	98.4	0.97
25~	100	100	100	100	1
50~	100	100	100	100	1
≥75	100	100	100	100	1
Height percentiles among female aged 13 y
<25	70.0	100	100	96.4	0.81
25~	72.7	100	100	97.3	0.83
50~	63.6	100	100	97.9	0.77
≥75	84.6	100	100	97.3	0.90
Height percentiles among female aged 14 y
<25	50.0	100	100	96.4	0.65
25~	81.8	100	100	97.9	0.89
50~	91.7	100	100	98.9	0.95
≥75	81.0	100	100	97.2	0.88
Height percentiles among female aged 15 y
<25	82.6	100	100	97.8	0.89
25~	70.0	100	100	96.6	0.81
50~	100	100	100	100	1
≥75	94.4	100	100	99.2	0.97
Height percentiles among female aged 16 y
<25	83.3	100	100	97.9	0.90
25~	77.4	100	100	96.0	0.85
50~	80.0	100	100	97.8	0.88
≥75	94.1	100	100	99.3	0.97
Height percentiles among female aged 17 y
<25	82.6	100	100	98.2	0.90
25~	84.2	100	100	98.1	0.91
50~	75.0	100	100	96.3	0.84
≥75	93.8	100	100	99.2	0.96

Abbreviations: BP, blood pressure; NPV, negative predictive value; PPV, positive predictive value.

^*All Ps < .001.