RESULTS	At 3 months follow-up , GAS was the most responsive measure ( standardized response mean 1.22 , Norman 's responsiveness statistic 0.58 ) compared with the Barthel Index ( 1.13 , 0.46 ) , Physical Self-Maintenance Scale ( 0.10 , 0.16 , 0.02 ) , Instrumental Activities of Daily Living ( 0.23 , 0.00 ) , and modified Spitzer Quality of Life Index ( -0.04 , 0.00 ) .\