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Pain and recovery of physical functioning nine months after total knee arthroplasty
Kristi Elisabeth Heiberg1, Vigdis Bruun-Olsen, Anne Marit Mengshoel
1Department of Nursing and Health Sciences, Institute of Health and Society, University of Oslo, Oslo, Norway. k.e.heiberg@medisin.uio.no
Objective:
To describe pain and recovery of physical functioning after total knee arthroplasty.
Design:
A longitudinal design with assessments preoperatively, and 1 week, 3 and 9 months postoperatively.
Subjects:
Sixty-three patients participated.
Methods:
Pain was assessed by visual analogue scale. Physical functioning was measured by 40-metre timed walking, timed stair-climbing and goniometry. At 9 months the Short Form-36 pain and physical function scales were added to make comparisons with the general population.
Results:
Pain score one week after surgery was 40 (standard deviation (SD) 23) vs 24 (SD 19) at 3 months (p < 0.001). At 9 months the pain score was 22 (SD 23) vs 49 (SD 18) preoperatively (p < 0.001). Knee extension did not differ from preoperative scores, but knee flexion reduced from 124 (SD 13) to 112 (SD 12) (p < 0.001). Forty-metre walking time improved from 37 (SD 13) to 34 (SD 11) s (p < 0.001), while the number of patients able to climb stairs was unchanged (p > 0.05). The patients' Short-Form 36 pain score did not differ from the general population, while the physical function score was 60 (SD 24) vs 75 (SD 24) (p < 0.001).
Conclusion:
Early pain reduction was registered. At 9 months, pain was equal to that in the general population, but a considerable number of patients still had problems in performing strenuous activities.
