Validity and reliability of the Portuguese version of the modified Migraine Disability Assessment

BMC Neurology

Table 7 Comparable reliability score with the original and some MIDAS versions

Country	Language	Source	Test-retest reproducibility	Internal consistency
Portugal	Portuguese		0.90 ^b	0.80
Lebanon	Arabic	14	0.99 ^b	0.81
Taiwan	Chinese	15	0.79 ^a	0.67
USA	English	8	0.80 ^a	0.76
UK	English	8	0.83 ^a	0.73
Canada	French	16	0.84 ^b	NA
Switzerland	German	17	0.99 ^b	0.69
Greece	Greek	18	0.82 ^b	0.71
India	Hindi	19	0.94 ^a	> 0.90
Italia	Italian	20	0.81 ^a	0.74
Japan	Japanese	21	0.83 ^a	0.82
Malaysia	Malay	22	0.87 ^a	0.84
Iran	Persian	23	0.71 ^a	0.80
Brasil	Portuguese	24	0.77 ^a	0.70
Spain	Spanish	25	0.81 ^b	0.80
Thailand	Thai	26	0.76 ^b	0.91
Turkey	Turkish	27	0.68 ^a	0.73

^aPearson’s/Spearman’s correlation coefficient; ^bInterclass correlation coefficient
NA not available in the paper

ISSN: 1471-2377