Chest
Volume 121, Issue 1, January 2002, Pages 32-39
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Clinical Investigations
Sarcoid
Mortality of Intrathoracic Sarcoidosis in Referral vs Population-Based Settings: Influence of Stage, Ethnicity, and Corticosteroid Therapy

https://doi.org/10.1378/chest.121.1.32Get rights and content

Study objectives

To compare the sarcoidosis mortalityin referral settings (RS) and population-based settings (PS), and toidentify the contribution of stage, ethnicity, and corticosteroidtherapy (CST) to their disparate outcomes.

Design

Allobservational studies identified in a MEDLINE search and bibliographicreview published in the English language since 1960 dealing with thecourse and prognosis of sarcoidosis in large, unsorted, adult,ambulatory RS and PS providing long-term follow-up were reviewed andsubjected to meta-analysis.

Measurements and results

Sarcoidosis mortality in RS (4.8%), in which 17% of patients had themost unfavorable prognosis as judged by stage (stage III), was 10-foldthat reported in PS (0.5%), in which 11% of patients were identifiedat this stage. The magnitude of this disparity could not be accountedfor solely by adverse selection, as indicated by stage or by ethnicity.Patients in RS received CST with sevenfold the frequency of PS, and itsprovision was highly correlated with stage-normalized mortality.

Conclusion

The prognosis of patients with intrathoracicsarcoidosis in PS is far more favorable than that obtained in RS.Sarcoidosis mortality is largely independent of ethnicity. Thepossibility cannot be excluded that excessive employment of CST mayunfavorably influence the long-term course of the disease in someindividuals.

Section snippets

Materials and Methods

All reports dealing with the long-term course and prognosis ofsarcoidosis originating in large, outpatient adult practices in Westerncountries, unsorted by chronicity, classified according to stage, andidentified in a MEDLINE search and bibliographic survey of publicationsin the English language from 1960 through 2000, were reviewed andallocated by origin in RS or PS. The search terms employed weresarcoidosis AND course, AND prognosis, AND outcome. Compendia based onhospitalized patients were

Meta-analysis and Review

Ten reports fulfilling the inclusion criteria wereidentified45678910111213; they are summarized in Tables 1,2.

Discussion

Imprecision of the available data, in combination with varyingmeans of data presentation, constitute the major limitation of thisstudy. Cumulative mortality is an imprecise estimate of mortality rate(which was not supplied), neither the dose or duration of CST wasprovided, no study supplied details of physiologic impairment, and onlyone study10 detailed the radiographic extent of disease.Patient age and duration of follow-up were supplied by differentauthors in noncomparable formats: range,

Conclusions

(1) Sarcoidosis mortality representative of patients who arelikely to be encountered by community physicians in western countriesis 0.5%, less than one tenth of that reported from RS; (2) althoughethnic differences strongly influence the incidence and clinicalmanifestations of sarcoidosis, they have little appreciable influenceon its mortality; and (3) the possibility that a lower threshold foradministering CST is associated with an increased mortality risk,beyond the selection effect that

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