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Table 4 Standard error of measurement (SEM) and smallest detectable change (SDC) for the three instrumentsa (n = 182)

From: Evaluation of three patient reported outcome measures following operative fixation of closed ankle fractures

Instrument

n

Test mean (SD)

Retest mean (SD)

SEMb

SDCcindividual

SDCcgroup

LEFS (0–80)c

179

68.54 (15.03)

69.03 (15.14)

4.50

12.49

0.93

LEFS adjusted

181

85.48 (18.39)

86.19 (18.41)

5.61

15.55

1.16

SEFAS (12–60)b

172

19.70 (8.99)

19.49 (9.23)

2.39

6.62

0.50

SEFAS adjusted

182

83.85 (18.52)

84.11 (19.01)

5.09

14.10

0.93

OMAS

140

78.04 (24.44)

79.64 (24.29)

6.87

19.04

0.92

OMAS adjusted

176

77.66 (24.38)

78.85 (23.90)

7.41

20.55

1.55

  1. aInstruments scored 0–100 unless otherwise stated
  2. bStandard error of measurement
  3. cSmallest detectable change
  4. bIncluded for comparison with existing studies that have used the same scoring