Giving thyroid hormones to all critically ill patients with low hormone levels may increase death risk overall, though it might help a small subgroup with extremely low levels.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
A systematic review could determine whether thyroid hormone therapy increases mortality in unselected ICU patients with NTIS.
A systematic review and meta-analysis of all RCTs comparing thyroid hormone (T3 or T4) versus placebo in adult ICU patients with NTIS, stratifying results by overall mortality and subgroup (T3 < 0.5 ng/mL), using fixed-effects models and assessing heterogeneity.
An RCT could confirm whether T3 therapy increases mortality in unselected ICU patients with NTIS.
A multicenter, double-blind RCT of 1200 adult ICU patients with NTIS (T3 < 0.8 ng/mL), randomized to receive oral T3 (10 mcg daily for 5 days) or placebo, with primary outcome of 28-day all-cause mortality and secondary outcomes of cardiac events and length of stay.
A cohort study could assess whether T3 therapy is associated with higher mortality in unselected ICU patients after adjusting for illness severity.
A prospective cohort study of 1500 ICU patients with NTIS, recording whether they received T3 therapy, matching by SOFA score, age, and diagnosis, and comparing 90-day mortality between treated and untreated groups.
A case-control study could compare prior T3 exposure in patients who died versus those who survived after receiving thyroid hormone therapy.
A case-control study comparing 100 ICU patients who died within 30 days after receiving T3 therapy to 100 matched survivors, assessing timing, dose, and duration of therapy and adjusting for illness severity.
An expert opinion can highlight the risk of harm from thyroid hormone therapy based on existing trial data.
A narrative review summarizing RCTs showing harm and benefit, as presented in this document.