The summary results sound interesting! I just had a very brief look and I wonder if this research will continue? Given that the time of observation is only 9 months, I think that lots is still to come to substantiate the actual effect.
Also, the finding (no/negative results) on women is interesting... Could be that the fact of men having had higher business income at baseline has to do with it. I haven't read in detail, but it is possible that businesses of male participants were older than the businesses of female participants... Surely worth reading more!