Table 8

Multiple regression analysis for MCID achievement.

Outcome Measure	RR	95% CI	P value^a
VAS Back
Insurance	1.7	(1.2–2.3)	0.001
VAS Leg
Age	1.0	(0.9–1.0)	0.512
Ageless CCI	1.6	(1.1–2.3)	0.024
EBL	3.3	(1.3–8.5)	0.010
HNP	0.5	(0.3–0.9)	0.032
ODI
Age	1.1	(1.0–1.0)	0.032
Ageless CCI	2.2	(1.4–3.5)	0.001
EBL	1.0	(0.9–0.9)	0.001
Smoking status	0.7	(0.4–1.3)	0.282
Operative length	0.9	(0.9–1.0)	0.772
Central stenosis	1.2	(0.7–1.9)	0.415
Foraminal stenosis	1.5	(0.9–2.3)	0.099
SF-12 PCS
Age	1.0	(0.9–1.0)	0.103
Gender	0.9	(0.6–1.3)	0.522
BMI	1.2	(0.8–1.7)	0.451
Ageless CCI	1.6	(0.9–2.6)	0.056
EBL	1.2	(0.5–2.5)	0.627
Smoker status	0.7	(0.4–1.3)	0.318
Operative length	1.1	(0.7–1.8)	0.551
HNP	0.5	(0.3–0.8)	0.016
Foraminal stenosis	0.6	(0.4–1.0)	0.063
Laminectomy	2.5	(0.5–11.5)	0.252
PROMIS PF
Gender	0.9	(0.6–1.5)	0.931
BMI	1.1	(0.8–1.7)	0.480
Diabetes	0.4	(0.1–1.3)	0.140
Insurance	2.0	(1.1–3.8)	0.022
EBL	4.5	(1.1–17.6)	0.027
No. of operative levels	1.3	(0.8–1.9)	0.287

Boldface indicates statistical significance.
aP value calculated using LASSO logistical regression model.
BMI, body mass index; CCI, Charlson Comorbidity Index; EBL, estimated blood loss; HNP, herniated nucleus pulposus; RR, relative risk; VAS, visual analog scale.