Association between serum iron and liver transaminases based on a large adult women population

Table 4 Threshold effect analysis of serum iron on ALT in all participants and non-pregnant women using two-piecewise linear regression models

	Adjusted β (95% CI), P value
All participants
Fitting by the standard linear model	0.026 (0.020, 0.031), < 0.001
Fitting by the two-piecewise linear model
Inflection point	68.00 ug/dL
Serum iron < 68.00 ug/dL	0.062 (0.045, 0.078), < 0.001
Serum iron > 68.00 ug/dL	0.013 (0.005, 0.021), 0.001
Log likelihood ratio	< 0.001
Non-pregnant women
Fitting by the standard linear model	0.016 (0.008, 0.025), < 0.001
Fitting by the two-piecewise linear model
Inflection point	41.00 ug/dL
Serum iron < 41.00 ug/dL	0.118 (0.052, 0.184), < 0.001
Serum iron > 41.00 ug/dL	0.009 (− 0.001, 0.019), 0.063
Log likelihood ratio	0.002

For all participants, the model was adjusted for age, race, education, family income-poverty ratio, pregnancy status, BMI, alcohol drinking, smoking exposure, cholesterol, glucose, triglycerides, work activity, HBP, diabetes, and CKD. For non-pregnant women, the model was adjusted for age, race, education, family income-poverty ratio, BMI, alcohol drinking, smoking exposure, cholesterol, glucose, triglycerides, work activity, HBP, diabetes, and CKD

ISSN: 2072-1315