Low back pain is defined as pain that extends from the 12th rib to the iliac bone, and its increasing incidence makes it one of the major causes of decreased productivity worldwide. Dysfunction is one of the important complications in patients with chronic low back pain, and related studies have shown that depression, pain catastrophization and other emotions can affect the occurrence and development of dysfunction. So the investigators wanted to study which psychological emotions affect the development of dysfunction in patients with low back pain.

Inclusion Criteria:

1. Age 18-75;
2. Patients with low back pain;
3. Have good communication skills to ensure the collection of scale information

Exclusion Criteria:

1. Suffering from severe mental or psychiatric disorders.;
2. Unwilling to participate in the interview;
3. Patients with pain in other areas

The study population consisted of patients who met the requirements of outpatient complaints and healthy people in daily life