Table 2 Threshold effect analyses of association between VAI levels and lung function FEV1% predicted, FVC% predicted using two-piecewise regression models in all the participants
From: Nonlinear relationship between visceral adiposity index and lung function: a population-based study
VAI | *Unadjusted | P-value | VAI | ΔAdjusted | P-value |
|---|---|---|---|---|---|
β(95%CI) | β(95%CI) | ||||
FEV1% predicted | |||||
< 15.0 | 0.63 (0.39, 0.87) | < 0.001 | < 14.9 | 0.61 (0.38, 0.85) | < 0.001 |
≥ 15.0 | − 1.54 (− 2.40, − 0.68) | < 0.001 | ≥ 14.9 | − 1.70 (− 2.63, − 0.77) | < 0.001 |
Likelihood ratio test p | < 0.001 | < 0.001 | |||
FVC% predicted | |||||
< 15.0 | 0.37 (0.13, 0.60) | 0.002 | < 14.7 | 0.40 (0.15, 0.62) | 0.002 |
≥ 15.0 | − 1.60 (− 2.43, − 0.77) | < 0.001 | ≥ 14.7 | − 1.61 (− 2.50, − 0.81) | < 0.001 |
Likelihood ratio test p | < 0.001 | < 0.001 | |||