Time

Mean ± SD

P-value

Prior-treatment

2.86 ± 0.11

Post-treatment

1 wk

7.42 ± 1.34

0.002

2 wk

6.74 ± 1.18

0.002

1 mo

5.86 ± 0.54

<0.001

2 mo

5.32 ± 0.65

0.001

3 mo

4.66 ± 0.80

0.007