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Table 1 A summary of scales of the standard Chinese SF12v2 in adolescents

From: Evaluation of internal reliability in the presence of inconsistent responses

  Scales
  Role emotional (RE) Physical functioning (PF) Mental health (MH)
Number of response categories (K) 5 3 5
Number of items    
   Positive polarity (m+) 2 2 1
   Negative polarity (m-) 0 0 1
Number of respondents 32939 32924 33025
Mean 7.58 5.57 7.02
Variance 4.05 0.65 2.62
Floora 2.2% 1.0% 0.6%
Ceilingb 25.7% 72.7% 6.7%
Cronbach's alpha 0.87 0.67 0.33
  1. a Percentage of values that equal to the plausible minimum of the scale
  2. b Percentage of values that equal to the plausible maximum of the scale