As compared with no screening , screening with low-dose CT cost an additional $ 1,631 per person ( 95 % confidence interval [ CI ] , 1,557 to 1,709 ) and provided an additional 0.0316 life-years per person ( 95 % CI , 0.0154 to 0.0478 ) and 0.0201 QALYs per person ( 95 % CI , 0.0088 to 0.0314 ) .