Depression, anxiety, stress, social interaction and health-related quality of life in men and women with unexplained chest pain

Table 1 Measurement scales used in the study and their reliability.

Scale	Assessment	Items	Scale score	Reliability	References
Interview Schedule	Social integration	6	0–30	Test-retest reliability 0.75	Henderson et al. 1980
for Social Interaction	Social attachment	8	0–16	Test-retest reliability 0.76	Undén et al. 1989
Zung Self-Rating	Symptoms of depression	20	20–80	Chronbach's alpha 0.92	Zung 1965
Depression Scale
Trait-Anxiety	Trait anxiety	20	20–80	Chronbach's alpha 0.83 to 0.92	Spielberg 1968
Inventory
SF 36	Health-related quality of life	36	0–100	Chronbach's alpha 0.79 to 0.93	Sullivan, Karlsson 1994

ISSN: 1471-2458