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Table 4 Receiver operating characteristics analysis examining the predictive performance of baseline obese status and additional fitness parameters on follow-up obese status

From: Does obesity persist from childhood to adolescence? A 4-year prospective cohort study of chinese students in Hong Kong

Models Predicted prevalence Sensitivity Specificity PPV NPV
1: Obese at Baseline 0.05
(0.04–0.05)
0.25
(0.23–0.28)
0.97
(0.96–0.97)
0.33
(0.30–0.36)
0.95
(0.95–0.95)
2a: + Overall Fitness 0.02
(0.02–0.02)
0.10
(0.08–0.11)
0.99
(0.98–0.99)
0.31
(0.26–0.36)
0.94
(0.94–0.95)
2b: + Endurance run 0.02
(0.02–0.02)
0.13
(0.11–0.15)
0.98
(0.98–0.99)
0.35
(0.31–0.40)
0.94
(0.94–0.95)
2c: + Sit-and-reach 0.03
(0.03–0.03)
0.15
(0.13–0.17)
0.98
(0.98–0.98)
0.32
(0.28–0.36)
0.95
(0.94–0.95)
2d: + Sit-up 0.02
(0.02–0.03)
0.13
(0.11–0.15)
0.98
(0.98–0.99)
0.35
(0.30–0.39)
0.94
(0.94–0.95)
2e: + hand grip 0.02
(0.01–0.02)
0.05
(0.03–0.06)
0.99
(0.98–0.99)
0.18
(0.14–0.23)
0.94
(0.94–0.94)
  1. PPV positive predictive value; NPV negative predictive value
  2. Note that Model 1 has only one predictor, Obese at Baseline, whereas Models 2a to 2e also include an additional fitness predictor