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Comparison of pretreatment data of subjects treated in this study
| Group | Age (year) | Gender | PTAa (dB) | PTAc (dB) |
| Perfusion (n=21) | 47.8±11.3* | 13/8# | 72±24.2 | 71±25.2 |
| Injection (n=23) | 46.2±13.3 | 15/8 | 75±19.2 | 71±24.2 |
| Drip (n=11) | 45.2±13.7 | 7/4 | 71±21.2 | 70±18.1 |
| Control (n=32) | 47.7±14.1 | 17/15 | 72±21.3 | 68±21.7 |
Data are expressed as mean±standard deviation (SD)
Male/female
PTAa: average PTA on admission; PTAc: average PTA after conventional treatment
