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September 6, 2026Journal of Cardiovascular Development and DiseaseOpen Access

NAFLD in AF admissions is linked to longer stays and higher costs without increasing mortality.

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Why the study?

Does concurrent NAFLD worsen inpatient outcomes in adults admitted for atrial fibrillation?

Population

1,891,479 weighted adult admissions with a primary discharge diagnosis of atrial fibrillation from the US…

Comparison

Concurrent Non-alcoholic fatty liver disease… vs No concurrent NAFLD diagnosis

Design

Cohort

Follow-up

In-hospital

Key result

Concurrent NAFLD in patients admitted for atrial fibrillation was associated with longer length of stay (3.99 vs. 3.35 days, p<0.001) and higher costs, but no difference in inpatient mortality.

Authors

XLXiuhong LyuBLBolun LiuYLYiting Li

Discussion

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Overview

May increase resource use in AF admissions; hypothesis-generating and leaves causal effects on outcomes open for prospective study.

Key Points

  • To evaluate the impact of concurrent non-alcoholic fatty liver disease on mortality, length of stay, and costs among patients hospitalized with atrial fibrillation.
  • Analyzed the National Inpatient Sample (2016–2019) for adult patients with a primary discharge diagnosis of atrial fibrillation (weighted N=1,891,479).
  • Applied multivariable linear and logistic regression adjusting for age, sex, race, insurance status, and Charlson Comorbidity Index to evaluate inpatient all-cause mortality, length of stay, and costs.
  • Of 1,891,479 weighted atrial fibrillation admissions, 13,840 carried a concurrent diagnosis of non-alcoholic fatty liver disease.
  • Concurrent fatty liver disease was associated with a longer length of stay (3.99 vs. 3.35 days, p < 0.001) and higher hospital costs ($13,841.65 vs. $12,154.55, p = 0.046).
  • No statistically significant difference in inpatient all-cause mortality was observed between patients with and without concurrent fatty liver disease.

Study Design

Type

Observational (n=1,891,479)

Multicenter

Yes

Structured PICO

Does concurrent NAFLD worsen inpatient outcomes in adults admitted for atrial fibrillation?

P
Population
1,891,479 adult patients admitted with a primary diagnosis of atrial fibrillation from the National Inpatient Sample (2016-2019).
E
Exposure
Concurrent Non-alcoholic fatty liver disease (NAFLD) diagnosis (n=13,840)
C
Comparator
No concurrent NAFLD diagnosis
O
Outcome
Inpatient all-cause mortalityhard clinical

Concurrent NAFLD in patients hospitalized for atrial fibrillation increases resource utilization (length of stay and costs) without significantly affecting inpatient mortality.

Cite This Study

Lyu et al. (2026) conducted an observational in Atrial Fibrillation (n=1,891,479). Non-alcoholic fatty liver disease (NAFLD) vs. No concurrent NAFLD was evaluated on Inpatient all-cause mortality. Concurrent NAFLD in patients admitted for atrial fibrillation was associated with longer length of stay (3.99 vs. 3.35 days, p<0.001) and higher costs, but no difference in inpatient mortality.

synapsesocial.com/papers/6a9d1e9328139818eab218bchttps://doi.org/10.3390/jcdd13090436
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