4.1
The committee considered the clinical evidence and noted the inconsistent results from the 2 randomised controlled trials (Kapural et al. 2016 and De Andres et al. 2017). In particular, the committee noted that Kapural et al. demonstrated statistically significantly better pain reduction using Senza compared with low‑frequency spinal cord stimulation (SCS), but that in De Andres et al. there was no statistically significant difference between the 2 treatments in this regard. The expert advisers explained that the low‑frequency SCS devices used as the comparator in both studies work in the same way as those used in standard clinical practice in the NHS. However, the response to low‑frequency SCS was lower than expected in De Andres et al., compared with both clinical experience and other trial results including Kapural et al. The external assessment centre (EAC) also highlighted that pain reduction was greater in Kapural et al. for both Senza and low‑frequency SCS compared with both treatment arms in De Andres et al.