Table 3. ML-factor analysis with loadings of the DESY-GP, descriptive values.

DESY-GP	Factor
Items	1 (depression symptoms)	h2	M	SD	rit	V
8 Does this patient show signs of joylessness and/or loss of interest?	0.98	0.95	0.15	0.36	0.77	1.97
9 Does this patient show signs of dejection, melancholy and/or hopelessness?	0.96	0.93	0.21	0.41	0.79	1.45
1 Do I have the impression that this patient is depressed?	0.93	0.87	0.22	0.41	0.78	1.37
6 Has this patient shown signs of social withdrawal?	0.91	0.83	0.15	0.36	0.70	1.93
11 Does this patient show signs of impaired concentration?	0.88	0.78	0.18	0.39	0.70	1.63
7 Has this patient shown signs of worrying about the future?	0.88	0.77	0.22	0.42	0.69	1.34
3 Does this patient show signs of reduced resilience in their daily life?	0.86	0.74	0.35	0.48	0.63	0.61
	2(medical history/external factors)
10 Does this patient show signs of sleep disorders?	0.85	0.73	0.21	0.41	0.47	1.45
5 Has this patient mentioned family problems?	0.80	0.63	0.23	0.42	0.47	1.26
4 Has this patient mentioned work-related problems?	0.56	0.31	0.14	0.35	0.27	2.01
2 Do I agree that the patient's reason for the encounter sufficiently explains the symptoms presented? (inverted)	0.55	0.29	0.11	0.31	0.30	2.54
15 Do I notice anything else unusual regarding depression?	0.52	0.27	0.12	0.32	0.28	2.30
13 Does this patient have any close relatives with mental illness?	0.45	0.20	0.13	0.34	0.24	2.20
14 Does this patient have any relevant physical illnesses?	0.30	0.09	0.43	0.49	0.19	0.28
Universal item: 12 Does this patient have a history of depressive phases?	–	–	0.35	0.48	–	1.97

Factors were tested independently.

DESY-GPQuestionnaire for the assessment of DEpression SYmptoms in Primary Care, external rating part for general practitionersh2communality scoreMmeanr_itdiscriminatory powerSDSD deviationVskewness