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J Occup Rehabil (2009) 19:238244 DOI 10.1007/s10926-009-9179-y
Functional Capacity Evaluation in Subjects with Early Osteoarthritis of Hip and/or Knee; is Two-Day Testing Needed?
M. W. van Ittersum H. J. Bieleman M. F. Reneman F. G. J. Oosterveld J. W. Groothoff C. P. van der Schans
Published online: 15 May 2009 Springer Science+Business Media, LLC 2009
Abstract Introduction The Work Well Functional Capacity Evaluation (WW FCE) is a two-day performance based test consisting of several work-related activities. Three lifting and carrying test items may be performed on both days. The objective of this study was to assess the need for repeated testing of these items in subjects with early osteoarthritis of the hip and/or the knee and to analyze sources of variation between the 2 days of measurement. Methods A standardized WW FCE protocol was applied, including repeated testing of lifting low, lifting overhead and carrying. Differences and associations between the 2 days were calculated using paired samples t-tests, intraclass correlation coefcients (ICC) and limits of agreement (LoA). Possible sources of individual variation between the 2 days were identied by Wilcoxon signed ranks tests. Pearson correlation coefcients were calculated for differences in performances between days
and differences in possible sources of variation between days. Results Seventy-nine subjects participated in this study, their mean (SD) age was 56.6 (4.8) years, median (minmax) WOMAC (Western Ontario and McMaster Universities) index scores for pain, stiffness and physical function were 5 (017), 3 (07) and 14 (049), respectively. Median (minmax) SF36 physical function was 75 (595), and SF36 pain score was 67 (1276). Mean performance differences ranged from -0.2 to -0.8 kg (P [ 0.05). ICCs ranged from 0.75 (lifting overhead) to0.88 (lifting low). LoA were: lifting low 8.0 kg; lifting overhead 6.5 kg; carrying 9.0 kg. Pearsons correlations were low and non-signicant. Conclusions All three tests show acceptable two-day consistency. WW FCE testing on two consecutive days is not necessary for groups of subjects with early osteoarthritis. Individual sources of variation could not be identied.
M. W. van Ittersum (&) C. P. van der Schans
Research and Innovation Group in Health Care and Nursing, Hanze University Groningen, University of Applied Sciences, P.O. Box 3109, 9701 DC Groningen, The Netherlands e-mail: [email protected]
C. P. van der Schanse-mail: [email protected]
M. W....