Adaptation and validation of the Hungarian version of Thyroid-Related Patient-Reported Outcome-39 (ThyPro-39) questionnaire: testing factor structure, known-group validity with the comparison of quality of life in Hashimoto’s thyroiditis and Graves’ disease

Journal of Patient-Reported Outcomes

Table 6 Bifactor model of psychosocial symptoms

Items (abbreviated)	General factor	Tiredness	Cognitive problems	Anxiety	Depressivity	Emotional suspectibility	Impaired social life	Impaired daily life
Been tired	0.598	0.546
Difficulty getting motivated	0.675	0.550
Energetic	-0.606	-0.453
Problems remembering	0.341		0.688
Slow or unclear thinking	0.421		0.775
Difficulty concentrating	0.527		0.729
Afraid or anxious	0.626			0.523
Felt tension	0.658			0.609
Uneasy	0.694			0.585
Sad	0.729				0.333
Unhappy	0.653				0.692
Self-confident	-0.555				-0.127
Easily stressed	0.627					0.725
Mood swings	0.634					0.331
Felt in control	-0.709					0.184
Difficult being with other people	0.587						0.533
A burden to other people	0.599						0.447
Conflicts with other people	0.533						0.447
Difficulty managing daily life	0.720							0.413
Difficulty participating in life	0.686							0.643
Everything takes longer	0.599							0.358
ECV	0.57	0.06	0.11	0.07	0.04	0.05	0.05	0.05
Omega	0.93	0.46	0.89	0.91	0.57	0.64	0.79	0.87
Omega hierarchical	0.79	0.22	0.66	0.39	0.31	0.54	0.32	0.29
Relative omega	0.85	0.48	0.74	0.43	0.54	0.84	0.41	0.33

Note: Percent of uncontaminated correlations (PUC) = 0.900. ECV = explained common variance