Table 2.

Univariable and multivariable linear regression analysis used to predict followup hematocrit

Variable	Univariable					Multiple linear regression
	R2	B	95% CI		p	Adj. R2	B	95% CI		p
			Lower	Upper				Lower	Upper
Age in years	0.080	0.08	0.01	0.14	0.029	0.134	−0.01	0.08	−0.10	0.796
Treatment group
Natesto		Ref.					Ref.
TC	0.200	3.15	1.50	4.81	<0.001		3.24	0.74	5.73	0.012
BMI (kg/m2)	0.0002	−0.01	−0.17	0.15	0.921		0.04	−0.12	0.19	0.644
Smoking history
No		Ref.					Ref.
Yes	0.006	0.66	−1.52	2.85	0.546		0.42	−1.69	2.53	0.694
Followup testosterone (10 ng/dL increase)	0.050	0.02	−0.003	0.05	0.085		0.004	−0.02	0.03	0.730

B: unstandardized regression coefficient; BMI: body mass index; CI: confidence interval; R2: coefficient of determination; adj. R2: adjusted coefficient of determination; Ref.: reference value; TC: testosterone cypionate.