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Table 4 Concurrent validity of the COHL (N = 370)

From: A new comprehensive oral health literacy scale: development and psychometric evaluation

  Mean (SD) P*
Age (years)   
 18–44 18.5 ± 5.0 < 0.001
 45–64 16.1 ± 5.2  
 65–80 14.5 ± 4.7  
Educational level   
 Less than primary school 11.2 ± 4.5 < 0.001
 Junior high school 10.7 ± 4.1  
 Senior high school or technical secondary school 14.2 ± 5.1  
 Junior college 16.5 ± 4.8  
 College/university diploma or higher 18.4 ± 4.0  
Monthly income (RMB yuan)   
 < 2000 14.0 ± 5.9 0.004
 < 4000 16.0 ± 5.1  
 < 6000 16.6 ± 5.2  
 < 8000 16.7 ± 4.5  
 < 10,000 17.8 ± 4.5  
 ≥ 10,000 18. 4 ± 3.9  
Oral condition self-assessment   
 Good 18.2 ± 5.0 0.013
 Moderate 17.0 ± 4.7  
 Poor 15.9 ± 4.5  
  1. SD standard deviation
  2. *Obtained from Kruskal–Wallis test