Each surgical intervention associated with even a minor tissue injury is a source of pain which needs to be effectively controlled. Although the Polish national guidelines for post-operative pain management have been published, many patients experience moderate and severe pain in the postoperative period. The aim of this study is (1) to assess pain severity among adult patients after different types of surgeries; (2) to identify demographic and clinical factors associated with postoperative pain.

Inclusion Criteria:

• adult
• elective surgery
• the American Society of Anesthesiologists score 1-3

Exclusion Criteria:

• diagnosed mental illness, alcohol abuse disorders, intellectual disability
• traumatic events within the last 6 months (e.g. death, breakdown of a relationship, job loss)
• problems with verbal communication

Adult patients underoing surgical procedures performed on general or regional anesthesia.