Table 12 Coefficient of variation for tension and contraction.
Group | Cases | Variation for tension and contraction | t | P | |
|---|---|---|---|---|---|
Pre-treatment | Post-treatment | ||||
Observation group | 263 | 0.28 ± 0.13 | 0.14 ± 0.08 | 14.874 | < 0.001 |
Control group | 374 | 0.27 ± 0.09 | 0.20 ± 0.17 | 7.038 | < 0.001 |
t | 1.147 | −5.323 | |||
P | 0.252 | < 0.001 | |||