Sleep disturbances are associated with anxiety, depression, and decreased quality of life in patients with coronary heart disease

Table 1 Comparison of quality of life, depression, and anxiety scores of patients with coronary heart disease with and without sleep disorders

Group	SAS score	SDS score
Sleep disorder group, n = 112	49.93 ± 8.37a	49.89 ± 6.47a
Non-sleep disorder group, n = 128	37.02 ± 10.84	40.45 ± 7.53
t value	10.389	10.336
P value	< 0.001	< 0.001

^aP < 0.05 vs non-sleep disorder group.

Data (points) are mean ± SD. SAS: Self-rating anxiety scale; SDS: Self-rating depression scale.