The hazard ratios ( HRs ) for ICD therapy compared to placebo were estimated within tertiles of baseline @MW distance : HR : @ ( @ % confidence interval -LSB- CI -RSB- : @ to @ ) for @MW distance > @ m ( top tertile ) ; HR : @ ( @ % CI : @ to @ ) for @MW distance @ to @ m ( middle tertile ) ; and HR : @ ( @ % CI : @ to @ ) for @MW distance < @ m ( bottom tertile ) .