Readability Assessment of Online Patient Education Material on Congestive Heart Failure

Table 2

Readability test formulas used to analyze patient education websites.

Readability test	Formula
Flesch-Kincaid Grade Level
Flesch Reading Ease
Gunning-Fog Score
Coleman-Liau Index
SMOG Index

Variables. Average number of letters per 100 words (), average number of sentences per 100 words ().
FKGL, Flesch-Kincaid Grade Level; FRE, Flesch Reading Ease; GFS, Gunning-Fog Score; CLI, Coleman-Liau Index; SMOG, Simple Measure of Gobbledygook.