A confirmatory study of the Combined Index of Severity of Fibromyalgia (ICAF*): factorial structure, reliability and sensitivity to change

Table 1 Test-retest reliability and measurement of the internal consistency of the different ICAF factors

Factors	Intraclass correlation coefficient	Cronbach's alpha coefficient
Emotional	0.79	0.88
Physical	0.87	0.77
Active coping	0.87	0.85
Passive coping	0.82	0.77
Overall	0.86	0.85

ISSN: 1477-7525