Novel SGRQ response analyses assessed HRQoL in COPD (tiotropium vs placebo).
SGRQ total scores were consistently better for patients on tiotropium vs placebo.
SGRQ score net benefit was better for tiotropium vs placebo at 6 months and 1 year.
Tiotropium maintenance therapy vs placebo had long-term sustained benefit on HRQoL.
These data may be a benchmark to assess benefits on HRQoL of other COPD therapies.