Weight Change and the Risk of Chronic Pain Following Hip and Knee Arthroplasties

Bispebjerg Hospital6,400 enrolled

Overview

The study is a nationwide, register-based cohort survey study. The objective of this study is to investigate whether weight change is associated with the incidence of persistent postoperative pain following total hip arthroplasty and knee arthroplasty across non-obese and obese and patients.

Study Type

OBSERVATIONAL

Enrollment

6,400

Conditions

Persistent Postsurgical Pain Arthritis Knee Arthropathy of Knee Arthropathy of Hip Weight Loss Weight Gain Obesity

Interventions

Weight gainOTHER

≥5% weight gain

Weight lossOTHER

≥5% weight loss after arthroplasty

Weight unchangedOTHER

\<5% weight change after arthroplasty

Eligibility

Sex: ALLMin age: 18 YearsMax age: 99 Years

Medical Language ↔ Plain English

Inclusion Criteria: \- Patients operated with primary hip or knee arthroplasty for osteoarthritis 11-15 months before survey distribution Exclusion Criteria: * Legally incompetent citizens, i.e., persons with a legal guardian, will not be asked to participate.

Outcomes

Primary Outcomes

Moderate/Severe Persistent Postoperative Pain

The primary outcome is the number of patients with moderate or severe persistent postsurgical pain in the operated hip or knee, defined as patients with a numerical rating scale (NRS) score higher than 3. The outcome will be presented as Odd Ratio (OR) with its' corresponding 95% Confidence Interval (CI)