Jéssica Ferreira Silva, Richard Eloin Liebano, Juliana Barbosa Corrêa, Raul Yukihiro Matsushita, Eduardo Yoshio Nakano


The aim of this study was to evaluate the time to relieving pain intensity in patients with non-specific chronic low back pain treated by interferential current. Knowledge of the number of sessions needed for relieving pain intensity is very important because it can be used as a measure of treatment effectiveness, and assists the physiotherapist in choosing the best treatment to be used. The analysis was conducted on a sample of 150 patients with non-specific chronic low back pain, using the Cox proportional hazard model. All analysis were performed by the free software R.


Survival analysis; censored data; electrical simulation; low back pain


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