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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Neuromodulation. 2016 Feb 29;19(5):469–476. doi: 10.1111/ner.12389

Table 1.

Baseline demographics of patients included in the study.

Parameter Units N = 762
Age Years mean ± SD 55.9 ± 13.9
Sex Male count (%) 314 (41.2%)
Charlson Comorbidity Index -- mean ± SD 0.46 ± 1.21
Wait Time Years mean ± SD 1.39 ± 0.72
Trial-to-Permanent Time (N = 658) Days mean ± SD 43.2 ± 34.7
Back Surgeries Before SCS -- mean ± SD 0.17 ± 0.51
≥ 1 Back Surgery Before SCS -- count (%) 102 (13.4%)
Initial Pain Diagnosis CRPS count (%) 21 (2.8%)
Chronic Pain 37 (4.9%)
Neuritis / Radiculitis 186 (24.4%)
Degenerative Spine Disease 213 (28.0%)
Post-Laminectomy Syndrome 28 (3.7%)
Back Pain 318 (41.7%)
Pain in Limb 110 (14.4%)
Pain Diagnosis at Implant CRPS count (%) 71 (9.3%)
Chronic Pain 257 (33.7%)
Neuritis / Radiculitis 235 (30.8%)
Degenerative Spine Disease 146 (19.2%)
Post-Laminectomy Syndrome 204 (26.8%)
Back Pain 133 (17.5%)
Pain in Limb 27 (3.5%)