Comparative study of the analgesic effects of interferential current therapy in low back pain from osteoarthrosis

The aim of this study was to compare the analgesic effects of the interferential therapy current frequencies in patients with low backpain from osteoarthrosis. Fourteen patients from both genders were selected and submitted to six physical therapy sessions, for two weeksat Universidade Católica de Brasilia Hospital. They were randomly distributed into two groups: one with the electrical stimulation with frequency of 4000 Hz and other with 2000 Hz; the other parameters were the same for both groups: amplitude modulated frequency(AMF) of 25 Hz, for 25 minutes. The comparative analysis was carried out using the analogue visual scale and two questionnaires for low back pain functional disability: the Revised Oswestry PainQuestionnaire and the Roland-Morris Disability Questionnaire. Results showed a signifi cant low back pain reduction when pretreatment and pos-treatments were compared to the analogue visual scale and both questionnaires. There was no difference of the analgesic effect between the two current frequencies.