Table 2.
Lesion-level and microwave therapy treatment characteristics. Data is presented as n (%) for categorical data and mean (SD) for continuous data
| All (n = 150) | Resolved (n = 125) | Not resolved (n = 25) | P-valued | |||
|---|---|---|---|---|---|---|
| Location, n (%) | Rearfoot (n = 38) | Heel | 38 (25%) | 32 (26%) | 6 (24%) | 0.587 |
| Forefoot (n = 103) | First metatarsal head | 17 (11%) | 14 (11%) | 3 (12%) | ||
| Fifth metatarsal head | 17 (11%) | 14 (11%) | 3 (12%) | |||
| Hallux | 16 (11%) | 14 (11%) | 2 (8%) | |||
| Second metatarsal head | 15 (10%) | 12 (10%) | 3 (12%) | |||
| Fourth metatarsal head | 14 (9%) | 10 (10%) | 4 (4%) | |||
| Third metatarsal head | 10 (7%) | 7 (7%) | 3 (12%) | |||
| Second toe | 9 (6%) | 9 (7%) | 0 (0%) | |||
| Fifth toe | 3 (2%) | 3 (2%) | 0 (0%) | |||
| Third toe | 2 (1%) | 1 (1%) | 1 (4%) | |||
| Midfoot (n = 9) | Lateral arch | 5 (3%) | 5 (4%) | 0 (0%) | ||
| Medial arch | 4 (3%) | 4 (3%) | 0 (0%) | |||
| Foot side, n (%) | Left | 68 (45%) | 57 (46%) | 11 (44%) | 0.857 | |
| Right | 82 (55%) | 67 (54%) | 14 (56%) | |||
| Duration, months, mean (SD)a | 35.2 (41.0) | 33.8 (42.2) | 42.3 (35.8) | 0.413 | ||
| Lesion diameter, mm, mean (SD) | 6.3 (7.9) | 6.67 (8.6) | 4.32 (1.9) | 0.205 | ||
| Total treatment sessions, mean (SD), range | 2.8 (1.0), 1–6 | 2.8 (1.0), 1–6 | 3.2 (1.0), 1–5 | 0.043 | ||
| Average applications per treatment session, mean (SD) | 2.0 (0.8) | 1.9 (0.8) | 2.3 (0.7) | 0.023 | ||
| Average watts setting per application, mean (SD) | 7.5 (2.2) | 7.4 (2.1) | 7.9 (2.3) | 0.335 | ||
| Average frequency setting per application, mean (SD) | 6.2 (2.8) | 6.4 (3.0) | 5.6 (1.7) | 0.213 | ||
| Average painb,c on arrival per treatment session, mean (SD) | 0.71 (1.2) | 0.8 (1.2) | 0.0 (0.0) | < 0.001 | ||
| Average painb,c during treatment per treatment session, mean (SD) | 7.8 (1.1) | 7.7 (1.1) | 8.4 (0.9) | 0.009 | ||
| Average painb,c on departure per treatment session, mean (SD) | 1.1 (1.5) | 1.2 (1.5) | 0.7 (1.3) | 0.288 | ||
| Average joules per treatment session, mean (SD) | 155.9 (68.3) | 150.6 (54.3) | 182.3 (82.4) | 0.034 | ||
aData available from only 13 (29%) of participants
bData was available from 35 (78%) of participants
cAs determined by a 0 to 10 Likert scale ranging from 0 (no pain) to 10 (extreme pain); dDifference between resolved and unresolved lesions. Chi-square tests were used for categorical data, and independent t-tests for continuous data