[Purpose] The aim of this study was to investigate the availability, usage, and factors
affecting usage of electrophysical agents by physical therapists in Nagano Prefecture,
Japan. [Subjects and Methods] Questionnaires were sent to all 1,571 physical therapists
working in 245 institutions within Nagano Prefecture. A total of 1,110 questionnaires were
returned, out of which 1,099 (70%) questionnaires containing valid responses were
analyzed. Frequencies and percentages were calculated for 22 modalities with regards to
availability, usage, rate of usage, and confidence level in usage. Factors affecting usage
and the relationship between rate of usage and confidence level (Spearman’s rho) were also
determined. [Results] The top three responses for the various outcome measures were as
follows: (1) hot packs (88%), low frequency stimulators (76%), and ultrasound (68%) for
availability; (2) hot packs (72%), ultrasound (61%), and cold packs (59%) for usage; (3)
hot packs (75%), cold spray (49%), and ultrasound (44%) for confidence in usage; and (4)
equipment availability (80%), past experience (79%), and research evidence (78%) for
factors affecting usage. There was a significant positive relationship between confidence
and usage for all modalities, except for ultraviolet radiation, iontophoresis, and
magnetic field. [Conclusion] Usage was strongly correlated with confidence, with the top
three used modalities also being the ones with the highest confidence in usage.