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Table 1 Patient and disease characteristics at baseline from the total group and the follow-up data from the reliability and the responsiveness sample*

From: The Dutch Lower Extremity Functional Scale was highly reliable, valid and responsive in individuals with hip/knee osteoarthritis: a validation study

N Baseline sample Reliability sample (≤3 weeks) Responsiveness sample (≥3 months)
401 106 112
Age, mean (SD) 58 (13) 61 (11) 58 (11)
Female, ♀% 231 (58%) 65 (63%) 59 (54%)
Index joint, knee 284 (71%) 81 (76%) 81 (72%)
BMI, median (IQR) 26 (24-29) 26 (24-30) 27 (24-30)
Education, higher 77 (20%) 25 (25%) 27 (25%)
Duration complaints, >5 years 144 (61%) 72 (63%) 59 (58%)
Co-morbidities, yes 192 (52%) 52 (50%) 63 (72%)
  Baseline data Follow-up data
  Hip group Knee Group Hip group Knee Group Hip group Knee Group
N 117 284 25 81 31 81
LEFS 36.0 (16.6) 39.6 (14.1) 29.8 (13.5) 36.4 (13.7) 34.3 (17.0) 37.5 (15.0)
HOOS/KOOS       
Pain, mean (SD) 44.6 (21.3) 49.9 (20.0) 41.7 (21.1) 46.5 (19.7) 43.6 (23.7) 53.8 (19.3)
Symptoms, mean (SD) 41.6 (21.4) 54.6 (19.3) 40.2 (20.3) 52.5 (20.5) 39.7 (23.5) 55.8 (19.6)
Function, daily living, mean (SD) 47.5 (21.9) 56.5 (21.7) 43.8 (21.0) 54.2 (20.3) 46.5 (24.0) 57.8 (21.4)
Function, sports and recreation, median (IQR) 25 (6-38) 10 (0-30) 13 (6-25) 5 (0-25) 19 (6-31) 10 (0-25)
Quality of life, median (IQR) 25 (13-38) 25 (13-44) 31 (19-38) 25 (13-38) 25 (13-38) 31 (19-44)
SF36       
Pain, mean (SD) 35.6 (8.9) 37.3 (8.2) 35.6 (6.5) 38.6 (7.3) 37.0 (8.0) 39.9 (8.3)
Functioning, mean (SD) 31.8 (9.8) 32.8 (9.2) 29.8 (8.5) 32.5 (8.2) 31.0 (10.0) 33.4 (9.5)
HADS (total), median (IQR) 9 (5-16) 9 (4-15) N/A N/A N/A N/A
CIS, mean (SD) 34.8 (12.6) 31.0 (13.6) N/A N/A N/A N/A
  1. * Figures are numbers and percentages in the brackets unless indicated differently. Cut-off arbitrarily chosen. Abbreviations: BMI = Body Mass Index, IQR = Inter Quartile Range, SD = Standard Deviation.