An observational study in Postoperative Pain, sponsored by Min Li. Completed at 1 site in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-05-08.
Sponsored by Min Li · Observational
This is a single-center retrospective cohort study to identify independent risk factors and develop a predictive nomogram for moderate-to-severe pain within 24 hours after Achilles tendon surgery.
5,093 studies on the registry are indexed under Pain, Postoperative; 1,140 are open to participants now.
This study's enrollment of 489 is above the median of 102 across 608 observational studies indexed under Pain, Postoperative.
Browse Pain, Postoperative studies →Min Li is the lead sponsor of 2 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
The study population consists of adult patients (≥18 years) who underwent Achilles tendon surgery at Peking University Third Hospital between January 2020 and December 2024. Eligible patients were those with complete perioperative data and standardized 24-hour postoperative pain assessments, meeting all inclusion and exclusion criteria of the study.
Exclusion Criteria:
This is a retrospective observational cohort study. No study-specific intervention is being investigated; all patients received routine clinical care as per standard practice.
Incidence of Moderate-to-Severe Acute Postoperative Pain
Defined as a pain score ≥ 4 on the Numeric Rating Scale (NRS) or the need for rescue analgesia within the first 24 hours after Achilles tendon surgery. The NRS is an 11-point scale ranging from 0 (no pain) to 10 (worst imaginable pain), where higher scores indicate greater pain severity (worse outcome).
Time frame: Within 24 hours after surgery
Highest Postoperative Pain Score
The maximum pain score recorded within 24 hours after Achilles tendon surgery, measured using the Numeric Rating Scale (NRS). The NRS is an 11-point scale ranging from 0 (no pain) to 10 (worst imaginable pain), where higher scores indicate greater pain severity (worse outcome).
Time frame: Within 24 hours after surgery
Rescue Analgesia Requirement
Proportion of patients requiring rescue analgesic medications within 24 hours after surgery.
Time frame: Within 24 hours after surgery
Incidence of Postoperative Nausea and Vomiting (PONV)
Proportion of patients experiencing nausea or vomiting requiring antiemetic treatment within 24 hours after surgery.
Time frame: Within 24 hours after surgery
Postoperative Length of Hospital Stay
Number of days from surgery to hospital discharge.
Time frame: From surgery to hospital discharge (up to 7 days)
This study is completed, as verified in May 2026. You cannot join it, but the record below documents what was studied.
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