Dutch Translation and Validation of the Headache-Specific Locus of Control Scale (HSLC-DV)

Table 2

Reproducibility and internal consistency of the HSLC-DV ().

	Weighted kappa	Item-rest correlation	Cronbach’s alpha if item deleted	Cronbach’s alpha
External LoC				0.79 (0.75) (0.88)
HSLC6	0.24	0.12	0.80
HSLC8	0.43	0.47	0.77
HSLC10	0.44	0.56	0.76
HSLC12	0.34	0.28	0.79
HSLC14	0.61	0.54	0.76
HSLC15	0.34	0.26	0.79
HSLC16	0.69	0.55	0.76
HSLC22	0.69	0.51	0.76
HSLC24	0.77	0.47	0.77
HSLC27	0.58	0.44	0.77
HSLC30	0.62	0.61	0.75
Internal LoC				0.89 (0.88) (0.86)
HSLC2	0.57	0.60	0.88
HSLC4	0.21	0.56	0.88
HSLC5	0.60	0.66	0.88
HSLC7	0.59	0.52	0.89
HSLC11	0.59	0.67	0.88
HSLC17	0.68	0.79	0.87
HSLC19	0.62	0.73	0.87
HSLC21	0.53	0.61	0.88
HSLC26	0.44	0.38	0.89
HSLC28	0.70	0.67	0.88
HSLC32	0.55	0.57	0.88
Chance LoC				0.73 (0.71) (0.84)
HSLC1	0.60	0.49	0.70
HSLC3	0.66	0.60	0.68
HSLC9	0.63	0.43	0.71
HSLC13	0.57	0.56	0.69
HSLC18	0.58	−0.02	0.77
HSLC20	0.43	0.32	0.72
HSLC23	0.60	0.53	0.70
HSLC25	0.61	0.55	0.69
HSLC29	0.68	0.06	0.76
HSLC31	0.51	0.39	0.71
HSLC33	0.56	0.36	0.72

LoC = Locus of Control subscale. Numbers correspond to the original HSLC scale. Danish study. Original US study.