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. 2011 Oct 20;6(10):e26621. doi: 10.1371/journal.pone.0026621

Table 5. Risk reclassification improvement among womena; anthropometric measures and risk of death from cardiovascular disease.

Anthropometric measures IDI (‰) P NRI 1b (‰) P NRI 2c (‰) P NRI 3d (‰) P
Model A e
Body mass index 0.94 0.07 0.28 0.95 −8.41 0.23 −6.63 0.43
Waist circumference 4.12 <0.001 2.73 0.67 8.42 0.37 15.00 0.19
Hip circumference 1.12 0.03 −0.98 0.81 −7.35 0.28 −7.38 0.35
Waist-to-hip ratio 5.01 <0.001 2.15 0.77 26.76 0.009 32.21 0.01
Waist-to-height ratio 4.36 <0.001 −4.39 0.51 10.77 0.26 9.10 0.43
Model B f
Body mass index 0.84 0.15 −3.27 0.42 5.90 0.35 5.36 0.48
Waist circumference 3.46 0.002 7.09 0.26 30.25 0.001 43.01 <0.001
Hip circumference 1.11 0.07 −2.80 0.53 6.36 0.34 6.98 0.38
Waist-to-hip ratio 3.90 0.002 −3.95 0.49 33.30 <0.001 36.08 <0.001
Waist-to-height ratio 3.65 0.001 4.37 0.47 25.41 0.006 35.50 0.001

Abbreviations: IDI = integrated discrimination improvement, NRI = net reclassification improvement.

a

Participants with body mass index <18.5 kg/m2 were excluded from the analysis.

b

NRI when adding a given anthropometric measure to a prediction model using two risk categories (<5%, ≥5%).

c

Three risk categories (<1%, 1–9%, ≥10%).

d

Four risk categories (<1%, 1–4%, 5–9%, ≥10%).

e

Variable included in model: Age.

f

Variables included in model: Age, smoking status, systolic blood pressure, and total cholesterol.