To explore the correlation of the incidence and social characteristics in patients with spinal degenerative diseases (SDD), and to provide certain evidence for prevention, treatment and incidence control of the disease.

Objectives: To explore the correlation of the incidence and social characteristics in patients withspinal degenerative diseases (SDD), and to provide certain evidence for prevention, treatment and incidencecontrol of the disease. Methods: Data between January 1, 2003 to December 31, 2016 were collected from electronic medical documents of the orthopedic department, including patients who suffered from SDD, treated by operation for the first time and aged 18 years old or over. Descriptive statistics and Chi-square test were used to analyze the correlation of social characteristics of patients（eg. age, gender, career, place of birth, nationality and comorbidities）and the degenerative spinal diseases.

Inclusion Criteria:

1. Diagnosed as spinal disc herniation (prolapse), spinal stenosis, Non-traumatic spinal instability, spondylolisthesis, degenerative scoliosis not caused by congenital spinal deformity. 2. Hospitalized patients under operation. 3. Over 18 yrs. 4. Patients in North China.

Exclusion Criteria:

- Patients diagnosed as Hypertrophy of Posterior Longitudinal Ligament or Hypertrophy of Ligamentum Flavum.

A total of 32522 surgical inpatients were selected from Peking University Third Hospital during 2003-2016.