. 2020 Jul 22;8(3):532–544. doi: 10.1016/j.esxm.2020.06.004

Table 4.

Multiple linear regression using forced entry, stepwise forward, and stepwise backward method (n = 122)

	Forced entry			Stepwise forward			Stepwise backward
	B	Se B	P value	B	Se B	P value	B	Se B	P value
Constant	5.885	10.815		−3.171	8.022		−1.929	8.171
Period since diagnosis^†	−0.258	0.426	.545
Duration of menses^‡	−0.489	0.567	.390
Dysmenorrhea severity^§	2.877	0.966	.004^∗	2.254	0.932	.017^∗	2.893	0.952	.003^∗
Dyspareunia^‖	43.111	4.385	<.001^∗	38.937	4.006	<.001^∗	41.895	4.109	<.001^∗
History of fertility treatment^‖	0.375	4.094	.927
Currently working^‖	−11.014	4.555	.017^∗	−9.916	4.261	.022^∗	−10.343	4.202	.015^∗
Dyschezia^‖	−3.548	5.005	.480
Dysuria^‖	−8.081	4.272	.061				−8.660	4.023	.033^∗
Pain medication use^‖	−9.887	5.463	.073				−8.808	5.248	.096
Abdominal pain outside menstruation^‖	−0.882	5.698	.877
HRQoL score^¶	0.384	0.100	<.001^∗	0.302	0.088	.001^∗	0.376	0.092	<.001^∗
	Adjusted R² = 0.558 (P < .001^∗)			Adjusted R² = 0.554 (P < .001^∗)			Adjusted R² = 0.570 (P < .001^∗)

B = unstandardized beta; EHP-30 = Endometriosis Health Profile-30; HRQoL = health-related quality of life; NRS = numerical rating scale; Se B = standard error for the unstandardized beta.

^∗

Significant P values.

^†

Continuous characteristic, in years.

^‡

Continuous characteristic, in days.

^§

Continuous characteristic, NRS (1–10).

^‖

Dichotomous characteristic, yes or no.

^¶

Continuous characteristic, EHP-30 (0–100).