Time N Mean SD Min Max P-value
Baseline 30 2.358 0.458 1.17 3.4 < 0.001a
3 months 30 4.055 0.478 3.38 5.03
6 months 30 4.766 0.359 4.13 5.78
9 months 30 5.291 0.268 4.72 6.23

aStatistically significant at P < 0.001 (repeated measures of ANOVA test).
N = number of sites; SD = standard deviation.