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Table 1 Means and CIs of numerical frequencies corresponding to the ordinal OHIP response categories (#1 - #4) and one OHIP point (#5); results of multi-level regression models with crossed random factors “patients” and “items” (random-effects parameters not presented)

From: Interpreting one oral health impact profile point

Model Variable Coefficient 95% CI P value
# 1    
  'Hardly ever' 9.1 (7.1 – 11.0) < 0.001
# 2    
  'Occasionally' 19.4 (16.1 – 22.7) < 0.001
# 3    
  'Often' 43.0 (37.0 – 49.0) < 0.001
# 4    
  'Very often' 70.1 (61.6 – 78.6) < 0.001
# 5    
  One OHIP point 15.2 (14.8 – 15.7) < 0.001