Table 7 Two-piecewise linear regression and logarithmic likelihood ratio test explained the threshold effect analysis of RFM with patient’s age at first gallstone surgery.

From: Association between relative fat mass and risk of gallstones in adults

RFM

ULR Test

PLR Test

LRT Test

β(95%CI)

β(95%CI)

P-value

< 30.99

−0.19 (−0.40, 0.02)

0.80 (0.07, 1.54)

0.005

>= 30.99

−0.33 (−0.56, −0.10)

  1. ULR, univariate linear regression; PLR, piecewise linear regression; LRT, logarithmic likelihood ratio test, statistically significant: P < 0.05.
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