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Table 3 Inter-item polychoric correlation analysis and item-total Spearman’s rho correlation (n = 1286)

From: Dimensionality and psychometric analysis of DLQI in a Brazilian population

  q1 q2 q3 q4 q5 q6 q7 q8 q9 q10
q1   0.55 0.64 0.53 0.59 0.35 0.45 0.36 0.38 0.51
q2    0.79 0.67 0.78 0.54 0.45 0.57 0.55 0.56
q3     0.74 0.87 0.63 0.61 0.62 0.61 0.65
q4      0.76 0.61 0.48 0.57 0.58 0.58
q5       0.71 0.58 0.66 0.62 0.67
q6        0.41 0.56 0.53 0.59
q7         0.47 0.49 0.52
q8          0.73 0.54
q9           0.61
DLQI-BRA 0.66 0.79 0.82 0.73 0.82 0.56 0.57 0.59 0.54 0.59
  1. All correlations produced p-values < 0.01