Of 71 patients ( 35 assigned tenecteplase and 36 assigned alteplase ) contributing to the primary endpoint , no significant differences were noted for percentage of penumbral salvaged ( 68 % [ SD 28 ] for the tenecteplase group vs 68 % [ 23 ] for the alteplase group ; mean difference 13 % [ 95 % CI -96 to 121 ] ; p = 081 ) .