An exploratory study of older adults' comprehension of printed cancer information: is readability a key factor?

Abstract

Printed cancer information often is written at or beyond high school reading levels, despite lower average literacy abilities of the public. The objectives of this exploratory study were twofold: (1) to evaluate older adults' comprehension of breast (BC), prostate (PC), and colorectal (CC) cancer information; and (2) to determine if comprehension of BC, PC, and CC information varies according to text readability. Comprehension of printed cancer resources was evaluated with 44 community-dwelling older adults using the Cloze procedure and recall questions. Participants' comprehension scores were compared with Simple Measure of Gobbledegook (SMOG) readability scores (<grade 13 vs. grade 13+). Overall, older adults had satisfactory comprehension of cancer information as measured by Cloze (.86 +/- .01) and recall (.71 +/- .02). For CC information written at grade 13, however, a significant negative correlation between readability and Cloze comprehension was found (r(s) = -.44, SE = .17, p = .019), indicating poorer participant comprehension at higher readability levels. Comprehension of BC or PC information did not vary by readability level. Though readability plays a role in older adults' understanding of cancer information, cancer type and content are also important factors that influence comprehension. Use of plain language is recommended for CC resources.