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HERDIN Record #: NCR-JAFES-14080814493850 Submitted: 08 August 2014 Modified: 10 March 2015

Prevalence and Impact of Subclinical Thyroid Dysfunction on Mortality among Patients Presenting with Cardiovascular Events

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Methodology.163 adult cardiac patients were screened for subclinical thyroid dysfunction, [subclinical hyperthyroidism (SCT), subclinical hypothyroidism (SCHO), non-thyroidal illness syndrome (NTIS)]. Demographic and clinical characteristics were analyzed using ANOVA and Fisher's exact test.  Outcome considered were hospital duration, need for mechanical ventilation, inotropic support and mortality.  Crude association between subclinical thyroid dysfunction and outcomes was evaluated using relative risk.  

Results. Prevalence of subclinical thyroid dysfunction was 32.5% (5.5% SCT, 5.5% SCHO, and 21.5% NTIS). The risk of necessitating mechanical ventilation was about twofold higher in subclinical thyroid dysfunction compared to euthyroid patients (RR=2.64), and was highest in SCHO (RR=3.71). The risk of inotropic support was about twofold higher (RR=2.70) in SCHO compared to euthyroid patients. Overall death rate was higher in subclinical thyroid dysfunction (RR=1.86), and highest in SCHO (RR=2.47) compared to euthyroid patients.

Conclusion. There is a significant prevalence of subclinical thyroid dysfunction among hospitalized patients with cardiac disease at 32.5%.  Cardiovascular risk factors are not statistically significant.  We observed a trend of increased risk of requiring mechanical ventilation, inotropes and overall mortality in SCHO. 


This study aims to determine the prevalence of subclinical thyroid dysfunction among cardiac patients at the Philippine General Hospital, and its association with mortality.


Publication Type
Publication Sub Type
Journal Article, Original
Journal of the ASEAN Federation of Endocrine Societies
Publication Date
May 2014


This study aims to determine the prevalence of subclinical thyroid dysfunction among cardiac patients at the Philippine General Hospital, and its association with mortality.


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