close to significanceP = 0.054
In contrast, the rate of progression in the nonsurgical group (13.2% and 17.1% in the non-matched and matched nonsurgical groups, respectively) was comparable to rates seen in our previous observational studies 20 , 22 The difference in the proportion of patients with progression to DCM was close to significance ( P = 0.054) compared to our non-matched non-surgical group.