Independently , giving a choice of treatment also yielded lower cost ( - $ 1,826 ; 95 % CI , - $ 4,634 to $ 749 ) and more QALYs ( 0.010 ; 95 % CI , -0.019 to 0.044 ) over no choice of treatment , with 87.0 % probability of cost-effectiveness at $ 100,000 / QALY .