Table 3.

Single-predictor logistic regression model results for short-term (≤3 months) and long-term (>3months) improvement in NRS arm pain by 2 or more points.

	Improvement ≤3 months post-injection (N = 163)		Improvement >3 months post-injection (N = 84)
	Odds Ratio (95 % CI)	P-value	Odds Ratio (95 % CI)	P-value
Age (per 10 years)	1.04 (0.97, 1.10)	0.266	1.11 (1.03, 1.21)	0.011
Female (vs. Male)	1.09 (0.95, 1.25)	0.216	0.80 (0.66, 0.95)	0.015
Body Mass Index (per 10 units)	1.13 (1.00, 1.29)	0.061	1.04 (0.88, 1.23)	0.645
Active Smoker	0.98 (0.83, 1.15)	0.775	0.89 (0.73, 1.09)	0.257
Symptom Duration (years)	0.98 (0.96, 1.01)	0.142	0.97 (0.93, 1.00)	0.073
History Cervical Surgery	1.04 (0.86, 1.25)	0.680	1.00 (0.80, 1.26)	0.976
History Cervical Interlaminar Injection	0.96 (0.81, 1.15)	0.673	1.01 (0.82, 1.25)	0.891
Disk Level (vs. C5–C6)
C6–C7,C7-T1	1.13 (0.89, 1.44)	0.316	1.02 (0.74, 1.40)	0.891
C3–C4,C4–C5	1.02 (0.81, 1.28)	0.897	0.95 (0.69, 1.30)	0.742
Location Left	0.96 (0.83, 1.10)	0.549	0.94 (0.78, 1.13)	0.531
Procedure Time (per 10 min)	0.92 (0.84, 1.02)	0.120	0.96 (0.85, 1.09)	0.521
Fluoroscopy Time (per 10 min)	1.00 (1.00, 1.00)	0.523	1.00 (1.00, 1.00)	0.980
Positive Response	1.61 (1.32, 1.96)	<0.001	1.20 (0.91, 1.59)	0.205
Cervical Pathology (vs. Disk Herniation)
Bony Foraminal Stenosis	0.88 (0.76, 1.03)	0.106	1.10 (0.90, 1.34)	0.363
Pseudoarthrosis	0.87 (0.51, 1.47)	0.598	1.36 (0.73, 2.52)	0.332
Blood Thinners	0.91 (0.66, 1.25)	0.553	1.28 (0.78, 2.10)	0.330
Physical Therapy	1.08 (0.90, 1.29)	0.412	1.04 (0.79, 1.37)	0.776
MRI	0.75 (0.50, 1.12)	0.156	0.78 (0.48, 1.28)	0.330
CT	1.00 (0.86, 1.15)	0.981	1.08 (0.89, 1.32)	0.439
X-ray	0.90 (0.68, 1.18)	0.447	1.01 (0.66, 1.56)	0.955
EMG	0.96 (0.83, 1.10)	0.559	1.03 (0.85, 1.24)	0.771
Time since Provider's 1st Injection (per year)	1.03 (0.99, 1.07)	0.120	1.03 (0.98, 1.09)	0.270

CI – confidence interval.