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Table 4 Spearman Correlation Coefficient for between the different readability indices

From: Quality and readability of web-based Arabic health information on periodontal disease

   FKGL SMOG FRE
Number of words Correlation Coefficient − 0.142 .245* 0.140
p 0.185 0.020 0.191
Number of sentences Correlation Coefficient − .537** .225* .535**
p 0.000 0.034 0.000
FKGL Correlation Coefficient   − 0.057 − 1.000**
p   0.598 0.000
SMOG Correlation Coefficient    0.050
p    0.640
  1. **. Correlation is significant at the 0.01 level (2-tailed)
  2. *. Correlation is significant at the 0.05 level (2-tailed)