Table 5. Associations between... | American Society of Hematology

Table 5.

Associations between BMH-related problems at 1 week and SF-36 RP score at 1 week

Explanatory variable^5-150	Coefficient (β)	SE	95% CI	t ratio	P	VIF
Intercept	124.10	3.37
Pain at donation site	− 2.29	0.97	− 4.19 to − 0.39	− 2.37	.018	2.03
Lower back pain	− 5.92	0.91	− 7.71 to − 4.13	− 6.50	< .001	2.14
Difficulty sleeping	− 5.41	1.14	− 7.65 to − 3.17	− 4.74	< .001	1.30
Light-headedness	− 3.71	1.28	− 6.23 to − 1.19	− 2.89	.0040	1.23
Nausea or vomiting	− 6.04	2.30	− 10.56 to − 1.52	− 2.63	.0089	1.10
Bleeding at donation site	− 4.48	1.32	− 7.07 to − 1.88	− 3.39	< .001	1.14

Explanatory variable^5-150	Coefficient (β)	SE	95% CI	t ratio	P	VIF
Intercept	124.10	3.37
Pain at donation site	− 2.29	0.97	− 4.19 to − 0.39	− 2.37	.018	2.03
Lower back pain	− 5.92	0.91	− 7.71 to − 4.13	− 6.50	< .001	2.14
Difficulty sleeping	− 5.41	1.14	− 7.65 to − 3.17	− 4.74	< .001	1.30
Light-headedness	− 3.71	1.28	− 6.23 to − 1.19	− 2.89	.0040	1.23
Nausea or vomiting	− 6.04	2.30	− 10.56 to − 1.52	− 2.63	.0089	1.10
Bleeding at donation site	− 4.48	1.32	− 7.07 to − 1.88	− 3.39	< .001	1.14

Adjusted R² = 0.46.

VIF indicates variance inflation factor.

F5-150

Potential explanatory variables included pain at the donation site, lower back pain, difficulty sleeping, nausea or vomiting, light-headedness, fainting, bleeding at the donation site, infection at the donation site, and pain at the site of intravenous injection.

Backward stepwise variable selection was used to decide which variables to retain in the model. Explanatory variables were retained in the model when α was less than or equal to 0.10.

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