Table 5 Threshold effect analysis of association between blood manganese and liver stiffness

Linear effect model

0.24 (0.06, 0.41)

0.07 (0.03, 0.12)

0.08 (0.04, 0.12)

Nonlinear effect model

 Cut-off points (K)

14.43

7.87

13.04

 Effect of < K

− 0.04 (-0.24, 0.16)

− 0.09 (− 0.28,0.10)

0.03 (− 0.03, 0.10)

 Effect of > K

1.76 (1.10, 2.41)

0.10 (0.05, 0.15)

0.16 (0.07, 0.25)

 Log-likelihood ratio

 < 0.001

0.08

0.04