Background: Gender differences may occur in many chronic diseases. We have examined the influence of gender in chronic obstructive pulmonary disease (COPD) on long-term responses to tiotropium. Methods: Subgroup analysis of data from the Understanding the Potential Long-term Impact of Tiotropium (UPLIFT®) trial (4-year, randomized, double-blind, placebo-controlled trial of tiotropium in patients with COPD). Results: Of 5992 patients, 75% were men and 25% women. Mean age was 65 and 63 years, respectively. Baseline post-bronchodilator forced expiratory volume in 1 s (FEV1) = 47% predicted(men) and 49% predicted(women). St George's Respiratory Questionnaire (SGRQ) total score was 44.9 and 48.7 units, respectively. At 48 months, improvement in trough FEV 1 over control was 92 mL(men) and 77 mL(women) (p < 0.001 for both), with no differences in the rate of decline (trial primary endpoint). Hazard ratio (HR) (95% confidence interval [CI]) for first exacerbation (tiotropium/placebo) was 0.87(0.81, 0.93)(men) and 0.83(0.74, 0.94)(women). Number of exacerbations (per patient-year) was reduced with tiotropium in men (from 0.82 to 0.71) and women (from 0.92 to 0.77) (p < 0.005 for both). HR (95% CI) for a hospitalized exacerbation was 0.89(0.79, 0.99) and 0.77(0.62, 0.94), respectively. HR (95% CI) for mortality during treatment was 0.85(0.72, 0.99)(men) and 0.85(0.62, 1.18)(women). Improvements in SGRQ total score (tiotropium-control) at 1, 2, 3 and 4 years were: -2.8, -2.3, -3.6, -2.4(men) and -2.7, -2.6, -2.6, -2.1(women) (p < 0.05 for all). Conclusion: Long-term treatment of COPD with tiotropium improves lung function, exacerbations and health status in men and women, with similar magnitudes of benefit. © 2010 Published by Elsevier Ltd.
Tashkin, D., Celli, B., Kesten, S., Lystig, T., & Decramer, M. (2010). Effect of tiotropium in men and women with COPD: Results of the 4-year UPLIFT® trial. Respiratory Medicine, 104(10), 1495–1504. https://doi.org/10.1016/j.rmed.2010.03.033