Patient activation in Europe: an international comparison of psychometric properties and patients’ scores on the short form Patient Activation Measure (PAM-13)

Table 3 Factor analyses and reliability

Test	Danish		Dutch	German	Norwegian
Test	Factor 1	Factor 2^a	Factor 1	Factor 1	Factor 1
Percentage of explained variance	69.5 %	24.4 %	85.4 %	90.8 %	96.7 %
Factor loadings	0.41–0.65	\|0.01\|–\|0.63\|	0.47–0.72	0.32–0.63	0.44–0.64
Cronbach’s alpha	0.86		0.88	0.80	0.84
Item-rest correlations	0.44–0.60		0.46–0.66	0.32–0.57	0.37–0.60

^aThe first three items had a higher loading for factor 2 than factor 1, but the loading for factor 1 was still >0.40. We therefore only performed the reliability analyses for factor 1 containing all 13 items

ISSN: 1472-6963