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Table 3 Internal consistency, scale statistics and inter-item correlations of the subscales

From: Validation and reliability of the Malaysian English version of the psychosocial impact of dental aesthetics questionnaire for adolescents

  N Cronbach’s α Scale statistics Inter-item correlations Item total correlation
    M SD M Min Max Min Max
12–14 years   
 Dental Self-Confidence 202a 0.83 15.99 5.56 0.45 0.33 0.62 0.48 0.72
 Social Impact 202a 0.83 18.54 6.56 0.38 0.17 0.55 0.41 0.66
 Psychological Impact 202a 0.79 16.44 5.25 0.39 0.23 0.57 0.42 0.65
 Aesthetic Concern 203 0.52 4.58 3.58 0.36 0.36 0.36 0.36 0.36
15–17 years   
 Dental Self-Confidence 190 0.84 15.21 5.29 0.47 0.36 0.64 0.53 0.73
 Social Impact 189a 0.86 19.63 6.78 0.43 0.27 0.60 0.47 0.68
 Psychological Impact 189a 0.83 17.11 5.56 0.46 0.32 0.69 0.49 0.76
 Aesthetic Concern 190 0.62 4.74 3.30 0.45 0.45 0.45 0.45 0.45
12–17 years   
 Dental Self-Confidence 392a 0.84 15.57 5.44 0.46 0.36 0.63 0.54 0.70
 Social Impact 391a 0.85 19.07 6.69 0.41 0.25 0.51 0.48 0.65
 Psychological Impact 391a 0.81 16.76 5.41 0.43 0.29 0.63 0.45 0.70
 Aesthetic Concern 393 0.56 4.66 1.86 0.47 0.40 0.55 0.48 0.60
  1. aListwise deletion of missing data (i.e., entire observation of individuals omitted when any of the variables were missing)