Over the 6-month follow-up period , IPS participants were more likely than those in usual care to work competitively ( 44.4 % for IPS vs. 10.5 % for controls , p = .022 ) , work more hours ( mean of 168 hr for IPS vs. 41 hr for controls , p = .002 ) , and work more weeks ( mean of 6.4 weeks for IPS vs. 1.8 weeks for controls , p = .003 ) .