title: Factors Related to Postoperative Pain Trajectories following Total Knee Arthroplasty: A Longitudinal Study of Patients Admitted to a Russian Orthopaedic Clinic.
abstract: This study explores sociodemographic, clinical, and surgical factors in relation to pain trajectories during the first 3 days following total knee arthroplasty (TKA). 100 patients (mean age 63.5 ± 7.8 years and 93% female) consecutively admitted for uncomplicated primary TKA were prospectively included. Postoperative pain was assessed using pain diaries. Measures of preoperative pain, symptoms, daily functioning, quality of life, comorbidities, knee function, perioperative characteristics, and physical/biochemical parameters were also evaluated. All pain ratings decreased in the three days following surgery (p < .001) as well as the reported number of daily hours in moderate/severe pain (p < .001). Women reported more pain than men (p = .009). Pain trajectories did not differ by education, employment, cohabitation, or any patient clinical and biochemical characteristics but were significantly related to preoperative anxiety (p = .029). Patients reporting moderate/severe pain prior to surgery also reported more hours in moderate/severe pain on days 0-3 postoperatively (p = .029). Patients with surgeries longer than 90 min reported more hours of moderate/severe pain compared with patients who had shorter surgeries (p = .008), and similar results were observed for ratings of pain with activity (p = .012). In this sample, only female gender, higher levels of preoperative pain and anxiety, and longer surgical duration were associated with increased pain after TKA.
authors.affiliation: Department of Knee Surgery N 17, Russian Research Institute of Traumatology and Orthopaedics n.a. R.R. Vreden, Saint Petersburg 195427, Russia.
authors.forename: Nikolai
authors.initials: N
authors.lastname: Kornilov
authors.affiliation: Department of Surgery, Lovisenberg Diakonale Hospital, 0440 Oslo, Norway; Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway.
authors.forename: Maren Falch
authors.initials: MF
authors.lastname: Lindberg
authors.affiliation: Department of Family Health Care Nursing, University of California, San Francisco, CA 94143-0606, USA; Department of Research and Development, Lovisenberg Diakonale Hospital, 0440 Oslo, Norway.
authors.forename: Caryl
authors.initials: C
authors.lastname: Gay
authors.affiliation: Department of Knee Surgery N 17, Russian Research Institute of Traumatology and Orthopaedics n.a. R.R. Vreden, Saint Petersburg 195427, Russia.
authors.forename: Alexander
authors.initials: A
authors.lastname: Saraev
authors.affiliation: Department of Knee Surgery N 10, Russian Research Institute of Traumatology and Orthopaedics n.a. R.R. Vreden, Saint Petersburg 195427, Russia.
authors.forename: Taras
authors.initials: T
authors.lastname: Kuliaba
authors.affiliation: Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, 0424 Oslo, Norway; Institute of Clinical Medicine, University of Oslo, 0316 Oslo, Norway.
authors.forename: Leiv Arne
authors.initials: LA
authors.lastname: Rosseland
authors.affiliation: Department of Knee Surgery N 17, Russian Research Institute of Traumatology and Orthopaedics n.a. R.R. Vreden, Saint Petersburg 195427, Russia.
authors.forename: Konstantin
authors.initials: K
authors.lastname: Muniz
authors.affiliation: Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway; Department of Research and Development, Lovisenberg Diakonale Hospital, 0440 Oslo, Norway.
authors.forename: Anners
authors.initials: A
authors.lastname: Lerdal