Table 8. Obliquely rotated factor loadings of principal axis factoring for the 13 items assessing pain intensity and interference.

	Factor 1	Factor 2
Bleeding episodes	-0.028	0.513
During physical efforts and/or movement	-0.020	0.821
Using stairs	0.096	0.784
After resting or staying still	-0.027	0.784
During rest, sitting or lying down	0.027	0.670
Accidental or “wrong” movements	0.125	0.738
General activity	0.686	0.183
Mood	0.775	-0.080
Walking ability	0.723	0.063
Normal work	0.744	0.122
Relations with other people	0.902	-0.155
Sleep	0.630	0.161
Enjoyment of life	0.745	0.066
Eigenvalue	6.862	1.588
% Variance explained	49.814	9.047

Extraction method: Principal axis factoring; Rotation method: Oblimin

Note: Primary factor loadings appear in bold