Which patients with chronic obstructive pulmonary disease benefit from the addition of an inhaled corticosteroid to their bronchodilator? A cluster analysis.

BMJ Open · 2013 · PMC3641457 · PMID 23613569

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did not quite reach statistical significanceno p-value reported

The largest benefit with SFC was observed in cluster 1, but the difference in RR between clusters 1 and 2 did not quite reach statistical significance.

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