Validity and Reliability of the Bahasa Melayu Version of the Migraine Disability Assessment Questionnaire
Table 4
Correlation coefficients in the Malaysian, Italian, American, and English studies.
Item
Malaysia1
Italy2
USA3
UK4
Pearson’s correlation
Spearman’s correlation
Pearson’s correlation
Spearman’s correlation
Pearson’s correlation
Spearman’s correlation
Pearson’s correlation
Spearman’s correlation
1
0.92
0.87
0.64
0.74
0.68
0.69
0.66
0.56
2
0.94
0.84
0.77
0.81
0.54
0.65
0.71
0.65
3
0.88
0.77
0.65
0.63
0.60
0.63
0.82
0.58
4
0.83
0.81
0.72
0.64
0.64
0.59
0.60
0.56
5
0.71
0.77
0.54
0.49
0.62
0.71
0.52
0.46
Total
0.91
0.87
0.81
0.77
0.80
0.78
0.83
0.77
A
0.65
0.73
0.61
0.70
NR*
NR*
NR*
NR*
B
0.86
0.89
0.64
0.65
NR*
NR*
NR*
NR*
NR: not reported; 1one hundred migraine patients from clinical studies; 2eighty-six migraine without aura patients from clinical series; 3ninety-seven migraine patients from the general population; 4one hundred migraine patients from the general population.