Understood? Evaluating the readability and understandability of intranasal corticosteroid delivery instructions

Allergic rhinitis is a widespread disease that has significant quality-of-life ramifications. Symptoms include rhinorrhea, nasal obstruction, cough, and postnasal drip. Intranasal corticosteroids are a hallmark of treatment of allergic rhinitis. However, the benefits of treatment are dependent on correct nasal spray technique, of which many patients are not aware. Patient instructions are included with the purchase of these medications. The readability and understandability for these educational materials has been minimally assessed in the medical literature. The aim of this study was to evaluate the readability and understandability of commonly used intranasal steroids.

Three readability measures (Gunning Fog, Simple Measure of Gobbledygook [SMOG], and FORCAST) and an understandability assessment (Patient Education Materials Assessment Tool for Printable Materials [PEMAT-P]) were used to evaluate the instructions for use of commonly prescribed intranasal steroids. Instructions with 6th grade readability level or lower were considered to meet health literacy experts' recommendations. Higher understandability values correlate to easier understandability.

Instructions for 10 intranasal corticosteroid brands were reviewed. Gunning Fog consistently estimated easiest readability, whereas FORCAST estimated most difficult readability. Twenty percent (20%) of analyzed instructions met National Institutes of Health and health literacy experts' recommended reading levels. Understandability of instructions ranged from 33% to 90%, with an average of 66%.

The benefit of intranasal corticosteroids is contingent on correct use by patients. However, the prepackaged instructions provided are most often above recommended reading levels and are difficult to understand. Future development of intranasal steroid instructions should meet recommended readability levels and be understandable to maximize their utility.