Table 3 The results of the two-piecewise linear model
From: Association between serum vitamin C and HPV infection in American women: a cross-sectional study
Outcome | HPV infection (OR, 95%CI) | P-value |
|---|---|---|
Fitting model by two-piecewise linear regression | ||
Inflection point of vitamin C, umol/L | 69.5 | |
< 69.5 | 0.9936 (0.9878– 0.9996) | 0.0353 |
> 69.5 | 1.0102 (1– 1.0205) | 0.04939 |
Likelihood ratio test | 0.009 | |