Threshold effect analysis of LTL on prevalence of ED using the two-piecewise regression model
| Leucocyte telomere length (T/S ratio) | Adjusted OR (95% CI), p value |
| Fitting by the standard linear model | 1.01 (0.50 to 2.04), p=0.976 |
| Fitting by the two-piecewise linear model | |
| Inflection point (1.037 (T/S ratio)) | |
| Leucocyte telomere length <1.037 (T/S ratio) | 1.99 (0.39 to 10.20), p=0.385 |
| Leucocyte telomere length ≥1.037 (T/S ratio) | 0.17 (0.03 to 0.90), p=0.039 |
| Log-likelihood ratio | <0.001 |
Adjusted for age, race/ethnicity, education level, smoking status, PIR, vigorous activity, moderate activity, alcohol consumption status, hypertension, diabetes, CVD, CKD, hyperlipidaemia and ED medications.
CKD, chronic kidney disease; CVD, cardiovascular disease; ED, erectile dysfunction; LDL, leucocyte telomere length; PIR, poverty income ratio.