Relative to pharmacotherapy with sertraline , prolonged exposure therapy was less costly ( - $ 262 ; 95 % CI , - $ 5,068 to $ 4,946 ) and produced more QALYs ( 0.056 ; 95 % CI , 0.014 to 0.100 ) when treatment was assigned , with 93.2 % probability of being cost-effective at $ 100,000 / QALY .