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Table 5 Threshold effect analysis for association of WWI and BMI (kg/m2) with serum ferritin (ng/ml)

From: The association of body mass index and weight waist adjustment index with serum ferritin in a national study of US adults

Exposures

WWI

BMI (kg/m2)

Linear effect model

  

 β, (95%CI)

8.62 (3.53, 13.72)

0.68 (0.17, 1.19)

Non-linear model

  

inflection point (K)

9.8

43.4

 β, (95%CI) (< K)

40.03 (5.70, 74.36)

0.90 (0.29, 1.51)

 β, (95%CI) (≥ K)

6.89 (1.46, 12.32)

− 0.62 (− 2.62, 1.39)

LLR

0.07

0.19

  1. All covariates in Additional file 3: Table S5 were adjusted
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European Journal of Medical Research

ISSN: 2047-783X

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