Table 7 Threshold effect analysis results of the association between NPAR and low BMD/OP (OP group) in men.

From: To explore the association between the neutrophil percentage to albumin ratio and low bone mineral density/osteoporosis based on NHANES 2011–2018

Outcome

Effect

P

Model 1 Fitting model by standard linear regression

1.48 (1.04–2.10)

0.030

Model 2 Fitting model by two-piecewise linear regression

  

Inflection point

0.92

 

 < 0.92

2.33 (0.02–332.47)

0.738

 ≥ 0.92

1.48 (1.00–2.18)

0.050

P for likelihood test

 

0.878

  1. Note: Model 1 shows a positive correlation between NPAR and the OP group (OR = 1.48, 95% CI: 1.04–2.10, P = 0.030). Model 2’s piecewise linear regression analysis identified a threshold at 0.92. The effect values before the threshold (< 0.92) and after the threshold (≥ 0.92) were 2.33 (P = 0.738) and 1.48 (P = 0.050), respectively. The P-value for the likelihood test was 0.878.
  2. Significant values are in bold.
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