Efficacy of salmeterol/fluticasone propionate by GOLD stage of chronic obstructive pulmonary disease: analysis from the randomised, placebo-controlled TORCH study.

Respir Res · 2009 · PMC2714501 · PMID 19566934

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a numerical trendno p-value reported

A numerical trend to greater improvement in SGRQ with worsening GOLD stage was noted with all active treatments, however this was not statistically significant.

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