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Table 2 Gunning’s Fog Index (FOG) and Simple Measure of Gobbledygook (SMOG) mean scores in the PICDs in the Dutch, Danish, and Norwegian studies

From: Readability of patient information and consent documents in rheumatological studies

  Number of values Mean (min-max) Std. Deviation
FOG-NL 14 12.7 (9.0–17.6) 2.6
FOG-DK 14 15.0 (11.0–18.7) 2.5
FOG-NO 20 14.5 (9.8–19.0) 2.4
SMOG-NL 7 13.3 (12.0–15.0) 1.0
SMOG-DK 7 14.9 (13.0–17.0) 1.4
SMOG-NO 10 14.3 (13.0–15.0) 0.7
FOG-All 48 14.2 (9.0–19.0) 2.6
SMOG-All 24 14.2 (12.0–17.0) 1.1