2015
DOI: 10.3109/15412555.2015.1044861
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The Effect on Total Mortality of Adding Inhaled Corticosteroids to Long-Acting Bronchodilators for COPD: A Real Practice Analysis in Italy

Abstract: Our findings showed a beneficial effect on mortality of adding inhaled corticosteroids to long-acting bronchodilators. The advantage was much more pronounced in patients with frequent exacerbations.

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Cited by 17 publications
(21 citation statements)
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References 41 publications
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“…These findings were confirmed in sensitivity analyses, considering users of the combination tiotropium + LABA as exposed to tiotropium and excluding patients using ICS during follow‐up. The observed but not statistically significant increase in risk for LABA with respect to LABA + ICS was previously reported for the same study population in a paper which is in press …”
Section: Discussioncontrasting
confidence: 94%
“…These findings were confirmed in sensitivity analyses, considering users of the combination tiotropium + LABA as exposed to tiotropium and excluding patients using ICS during follow‐up. The observed but not statistically significant increase in risk for LABA with respect to LABA + ICS was previously reported for the same study population in a paper which is in press …”
Section: Discussioncontrasting
confidence: 94%
“…The apparent contradiction between increased pneumonia risk and unchanged/decreased mortality led the authors to speculate that pneumonia may result from the local immunosuppressive effects of ICS, which may, however, modulate the severity of pneumonia via their anti-inflammatory effects. Two recent independent observational studies provide support for this notion 57,58…”
Section: Discussionmentioning
confidence: 85%
“…The as‐treated approach accounts for switching therapy and therapy discontinuation during the follow‐up period. However, both switching and discontinuation might be predictors of adverse health outcomes due to drug intolerance or treatment failure, which may have led to informative censoring . To limit this potential bias, a 30‐day grace period for drug discontinuation was applied, according to previous studies .…”
Section: Discussionmentioning
confidence: 99%
“…The number of DDD was converted to the number of days the patient was treated, counting 1 DDD per day and distributing all available DDDs to days of follow‐up (including the days covered by the last prescription). At the end of the exposure period (ie, when all available DDDs were expired), a renewal time of 30 days (ie, grace time) was applied during which the patient was considered “exposed” without being censored for discontinuation . In the case of switching, a 7‐day grace time was used to limit the potential misclassification of exposure accounting for the 5‐ to 6‐day half‐life of tiotropium terminal elimination …”
Section: Methodsmentioning
confidence: 99%