Table 3.
Changes in the mean PRTEE and qDASH scales during the follow-up period
| Variable | Mean PRTEE score | P value | Mean qDASH | P value | ||
|---|---|---|---|---|---|---|
| Treatment group (mean ± SD) | Control group (mean ± SD) | Treatment group (mean ± SD) | Control group (mean ± SD) | |||
| Pre-injection | 90 ± 7.49 | 93 ± 7.23 | 0.85 | 78.6 ± 6.8 | 77.7 ± 8.94 | 0.79 |
| At 1-month | 33.7 ± 6.5 | 89.1 ± 12.3 | < 0.001 | 42.8 ± 8.9 | 78.2 ± 11.3 | < 0.001 |
| At 3-month | 10.2 ± 2.4 | 73.2 ± 9.9 | < 0.001 | 23.1 ± 8.6 | 66.1 ± 12.1 | < 0.001 |
| At 6-month | 9.5 ± 1.6 | 75.4 ± 6.9 | < 0.001 | 24 ± 5.6 | 60.2 ± 7.9 | < 0.001 |
| At 12-month | 10.8 ± 2.0 | 69.6 ± 7.2 | < 0.001 | 24.5 ± 6.0 | 54.1 ± 9.4 | < 0.001 |
| P Repeated measures ANOVA | ˂0.001 | ˂0.001 | ||||
| Paired difference* (mean ± SD) | 80.3 ± 8.7 | 20.5 ± 3.9 | < 0.001 | 55.5 ± 6.3 | 11.6 ± 1.8 | < 0.001 |
| Percentage of score reduction** (mean ± SD) | 88.7 ± 9.5 | 21.8 ± 4.4 | < 0.001 | 70.6 ± 8.1 | 14.9 ± 2.6 | < 0.001 |
PRTEE, Patient-Related Tennis Elbow Evaluation; qDASH, quick Disabilities of the Arm, Shoulder and Hand. *Difference between values for each case at 3-month follow-up and pre-injection was calculated for both scores in both groups. A new variable (paired difference) for which the mean and SD were calculated; **paired difference/score pre-injection. Pairwise comparisons were done by multiple paired t tests with a Bonferroni correction to keep the type I error at 5% overall