| Group 1 | Group 2 | Group 3 | Group 4 |
| Mean ± SD (range) | |||
New | −5.31 ± 6.79 (−16.9 - 0.00) | −9.12 ± 15.85 (−51.06 - 49.27) | −4.06 ± 7.04 (−20.73 - 7.02) | −4.69 ± 6.19 (−18.10 - 0.00) |
1 Infiltration | −7.21 ± 23.91 (−53.08 - 59.63) | 31.34 ± 51.60 (−74.05 - 107.11) | 12.76 ± 34.81 (−74.81 - 115.57) | 0.63 ± 40.35 (−76.34 - 74.96) |
2 Infiltrations | 3.89 ± 22.26 (−31.58 - 88.33) | 3.26 ± 46.79 (−73.05 - 94.46) | −2.15 ± 31.34 (−71.76 - 49.82) | 5.12 ± 45.20 (−63.12 - 106.32) |
P value | 0.0518 | 0.0026 | 0.0143 | 0.7438 |