Overview

Adult patients undergoing elective non-cardiac surgery were enrolled. Anxiety before the operation was evaluated by The State Anxiety Inventory (S-AI). Logistics regression would be used for identifying the independent factors of preoperative anxiety and prediction model would be established.

Eligibility

Inclusion Criteria:

1. patients undergoing elective with general anesthesia surgery (gynecologic oncology, general surgery, orthopedics and urinary);
2. The estimated operation time is more than 2 hours. 3)18≤ age ≤ 80;

        4)be able to communicate normally in daily life, without serious hearing and visual
        impairment; 5)ASA:I-II; 6)sign informed consent and volunteer to participate in this study.
        Exclusion Criteria:
          1. Having a history of brain diseases, such as stroke, epilepsy, psychosis other history
             of neuropsychiatry.
          2. Patients with serious diseases of heart, liver, lung, kidney or other organs.
          3. Having a definite diagnosis of cognitive impairment, such as Alzheimer's disease;
          4. Those who use sedatives before evaluation in this study;
          5. Drug addicts;
          6. Alcoholics;
          7. pregnant women;
          8. participated in other clinical trials as a subject in the past 3 months.