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. Author manuscript; available in PMC: 2006 Dec 8.
Published in final edited form as: Am J Med Qual. 2006;21(1):49–56. doi: 10.1177/1062860605283572

Table 3.

SF-36 and VFQ-25 Mean, Standard Deviation, Median, and Range of Item Readability

Flesch Reading Ease Index
 Flesch-Kincaid Formula
SF-36 VFQ-25 SF-36 VFQ-25
Mean   76  68.4  6.2    7.7
Standard deviation   19.2  11.2  3.1    2.7
Median   75  67.3  4.7    8.3
Range   31.7-100  41.8-87.9  2.2-12    3.7-12

SF-36 = Short Form Health Survey; VFQ-25 = Visual Functioning Questionnaire–25.