Selenium Deficiency Linked to Frailty in Cirrhosis

Key Takeaways

• Among ambulatory adults with cirrhosis awaiting liver transplant, vitamin A, zinc, and vitamin D deficiencies were observed in 73%, 71%, and 64%, respectively.
• Vitamin E, vitamin B12, and selenium deficiencies were observed in 24%, 22%, and 17% of the cohort, while vitamin B6 and vitamin B9 deficiencies were uncommon at 3% each.
• Frail patients more often had vitamin B12 deficiency and vitamin E deficiency than nonfrail patients.
• Selenium deficiency was also more common in frail patients and was the only micronutrient deficiency that remained independently associated with frailty after adjustment.

Ambulatory adults with cirrhosis arriving for liver transplant evaluation often carry a substantial outpatient nutrition burden that is less visible than deficiencies seen during hospitalization. Frailty adds clinical urgency because reduced physical reserve can complicate transplant assessment and short-term prognosis. Which micronutrient deficits cluster most closely with frailty before listing has remained an open question in routine pretransplant care.

A single-center observational cohort in the Wang et al. study of micronutrient deficiencies in ambulatory adults with cirrhosis included 275 ambulatory adults with cirrhosis undergoing initial liver transplant (LT) evaluation, with frailty defined as a same-day Liver Frailty Index (LFI) of at least 4.4 and present in 64 patients. Routine protocolized micronutrient testing was performed during the required dietitian evaluation and covered zinc, vitamin D, vitamin E, vitamin B12, selenium, vitamin A, vitamin B9, and vitamin B6.

Frail patients more often had vitamin B12 deficiency than nonfrail patients, 34% versus 18%, and vitamin E deficiency followed the same pattern at 36% versus 20%; both differences were statistically significant. Other measured deficiencies were not reported as significantly different by frailty status.

Selenium deficiency was also more common in frail than nonfrail patients, 28% versus 13%. After adjustment for cirrhosis etiology, hemoglobin, Model for End-stage Liver Disease 3.0 (MELD 3.0), dialysis status, hepatocellular carcinoma (HCC), ascites, and hepatic encephalopathy (HE), selenium deficiency remained associated with frailty (adjusted OR 2.55, 95% CI 1.18-5.54; p=0.02). The vitamin B12 and vitamin E associations no longer met statistical significance after adjustment.

Because the analysis was cross-sectional, it could not determine whether micronutrient depletion contributed to frailty, reflected frailty-related nutritional compromise, or both. Each micronutrient was measured once, diet and prior supplement exposure were incompletely captured, hospitalization and mortality events were limited, and the cholestatic subgroup was small. Zinc varied by cirrhosis etiology, and the vitamin B6/cholestatic and ascites-related patterns were secondary findings.

In this ambulatory pretransplant cohort, multiple micronutrient deficiencies were common, and selenium showed the most durable adjusted association with frailty. Any role for micronutrient repletion remains a question for future study rather than a demonstrated benefit of this analysis.

Clinician Questions

How was frailty defined for ambulatory adults with cirrhosis undergoing liver transplant evaluation?

Frailty was defined as a Liver Frailty Index of 4.4 or higher, measured the same day as the pretransplant nutrition evaluation. The index incorporated chair stands, balance testing, and dominant-hand grip strength.

Which subgroup patterns in micronutrient deficiency were reported beyond frailty status in cirrhosis awaiting liver transplant?

Beyond frailty status, zinc deficiency varied by cirrhosis etiology, vitamin B6 deficiency was higher in cholestatic than noncholestatic disease at 14% versus 2%, and vitamin A and zinc deficiency were more common in patients with ascites at 82% versus 59% and 79% versus 60%. Only 14 patients in the cohort had cholestatic liver disease, which narrows the context for that subgroup finding.

What factors were included in the adjusted frailty model for selenium deficiency in cirrhosis?

The multivariable frailty model adjusted for cirrhosis etiology, hemoglobin, MELD 3.0, dialysis status, hepatocellular carcinoma, ascites, and hepatic encephalopathy. The article also noted that the vitamin B12 and vitamin E associations attenuated after adjustment and that both remained significant until hemoglobin was added to the model.

How far do the selenium-frailty findings extend beyond the pretransplant outpatient setting?

The selenium-frailty findings come from a single-center cohort of ambulatory adults with cirrhosis undergoing initial liver transplant evaluation, so they are most directly applicable to that setting. The cross-sectional design does not establish directionality, and the findings do not automatically extend to hospitalized patients or all cirrhosis populations.