Table 2. Multiple regression analysis result of the tip.

Exposure	Non-adjusted	Adjust 1	Adjust 2
E	‒0.01 (‒0.25, 0.30)	0.03 (‒1.30, 1.02)	‒0.04 (‒0.61, 1.31)
P	0.15	0.21	0.11

Values: OR (95% CI); result variable: the time penile tip rigidity greater than 60%; exposure variable: E; adjust 1 model adjust for: age, systolic, diastolic; adjust 2 model adjust for: age, systolic, diastolic, blood glucose, TC, HDL, LDL, FSH, PRL, T, LH, P, total tip duration. E, estradiol; P, progesterone; TC, total cholesterol; TG, triglyceride; HDL, high-density lipoprotein cholesterol; LDL, low-density lipoprotein; FSH, follicle stimulating hormone; PRL, prolactin hormone; T, testosterone; LH, luteinizing hormone; P, progesterone.