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. 2015 Sep 21;19(1):60–70. doi: 10.1111/ner.12349

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© 2015 The Authors. Neuromodulation: Technology at the Neural Interface published by Wiley Periodicals, Inc. on behalf of International Neuromodulation Society.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Between‐group mean difference at three and six months for angina frequency (SAQ) adjusted for baseline score and stratification variables (i.e., center, CCS class, age <65 vs. ≥65 years). Error bars represent standard error of difference. Positive between‐group difference in SAQ indicates superior scores for SCS group compared with UC group. CCS, Canadian Cardiovascular Society functional classification of angina; SAC, Seattle Angina Questionnaire; SCS, spinal cord stimulation; UC, usual care.