Table 5 The restricted cubic spline (RCS) analysis between age and the specific parameters from biochemistry profiles in subgroup analysis for AMD and non-AMD participants in NHANES (2005 to 2008).

From: A cross-sectional observational study of the association between biochemistry profiles and the risk of age-related macular degeneration

Indicators

Total bilirubin (umol/L)

Uric acid (umol/L)

Non-AMD

AMD

Non-AMD

AMD

χ2

P

χ2

P

χ2

P

χ2

P

Age

6.980

0.031*

5.090

0.079

10.160

0.006**

0.400

0.820

  1. Note: P: the P value for the nonlinear analysis; *P < 0.05; **P < 0.01; AMD: age-related macular degeneration; NHANES: national health and nutrition examination survey.
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