# Fibrosis-4 (FIB-4) Calculator

```Fibrosis-4 (FIB-4) Calculator
[text size=3 name="age"] <-- Age
[text size=3 name="alt"] <-- ALT
[text size=3 name="ast"] <-- AST
[text size=3 name="plt"] <-- Platelets
[calc memo="number" value="score=((ast)*(age)/((plt)*(Math.pow((alt),0.5)))).toFixed(2)"] <-- score
[calc memo="number" value="score2=((ast)*(age)/((plt)*(Math.pow((alt),0.5)))).toFixed(2);score2>3.25?'possibly consistent with advanced fibrosis':score2>=1.45?'within the normal zone':'possibly consistent with advanced fibrosis'"] <-- interpretation (advanced fibrosis may be present above 3.25 and below 1.45)
[checkbox memo="Hide/Display References" name="footnotes" value=""][conditional field="footnotes" condition="(footnotes).is('')"]
references:
[link url="//pubmed.ncbi.nlm.nih.gov/16729309/" memo="#1"] Sterling RK, Lissen E, Clumeck N, et al. Development of a simple noninvasive index to predict significant fibrosis in patients with HIV/HCV coinfection. Hepatology. 2006;43(6):1317-1325.[/conditional]

```
Fibrosis-4 (FIB-4) Calculator
<-- Age
<-- ALT
<-- AST
<-- Platelets
numberscore=((ast)*(age)/((plt)*(Math.pow((alt),0.5)))).toFixed(2) <-- score
numberscore2=((ast)*(age)/((plt)*(Math.pow((alt),0.5)))).toFixed(2);score2>3.25?'possibly consistent with advanced fibrosis':score2>=1.45?'within the normal zone':'possibly consistent with advanced fibrosis' <-- interpretation (advanced fibrosis may be present above 3.25 and below 1.45)
Hide/Display References

Sandbox Metrics: Structured Data Index 0.2, 9 form elements, 29 boilerplate words, 4 text boxes, 1 checkboxes, 1 links, 2 calculations, 1 conditionals, 5 total clicks