Table 6

Multivariable analysis of association between number of total allergies and achieving minimal clinically important difference at 1 y in cervical spine surgery.

Cervical Spine	RR	P Value^{^a}
Neck Disability Index
0 Patient-reported allergies	Ref
1 Patient-reported allergy	1.15	0.717
2 Patient-reported allergies	1.29	0.597
≥3 Patient-reported allergies	1.11	0.843
VAS neck pain
0 Patient-reported allergies	Ref
1 Patient-reported allergy	1.73	0.258
2 Patient-reported allergies	1.63	0.378
≥3 Patient-reported allergies	1.92	0.218
VAS arm pain
0 Patient-reported allergies	Ref
1 Patient-reported allergy	0.80	0.552
2 Patient-reported allergies	0.78	0.598
≥3 Patient-reported allergies	0.69	0.487
SF-12 PCS
0 Patient-reported allergies	Ref
1 Patient-reported allergy	1.48	0.446
2 Patient-reported allergies	1.60	0.425
≥3 Patient-reported allergies	1.56	0.467
SF-12 MCS
0 Patient-reported allergies	Ref
1 Patient-reported allergy	1.35	0.603
2 Patient-reported allergies	0.80	0.773
≥3 Patient-reported allergies	2.01	0.268
PROMIS
0 Patient-reported allergies	Ref
1 Patient-reported allergy	1.77	0.246
2 Patient-reported allergies	2.11	0.173
≥3 Patient-reported allergies	1.70	0.392

↵a Multivariable linear regression controlling for gender, CCI, ASA, and preoperative PROMIS.
ASA, American Society of Anesthesiologists; CCI, Charlson Comorbidity Index; PROMIS, patient-reported outcomes measurement information system; Ref, reference; SF-12 MCS, short form-12 mental component score; SF-12 PCS, short form-12 physical component score; VAS, visual analog scale.