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Table 2 Means and standard deviations of the 4 testers of the continuous variables, percentage of findings for categorical or ordinal variables, the reliability model used during the analysis, the reliability coefficient, the percentage of agreement for Kappa calculation, the 95% CI, and the standard error of measurement for continuous variables.

From: Reliability of measures of impairments associated with patellofemoral pain syndrome

Variable (n = 30)

Mean (SD) or % of findings

Model used

Reliability coefficient and % of

agreement for Kappa calculation

95% CI

SEM

Hamstrings length (degrees)

81.5 (15.0)

ICC (2, 2)

.92

(.82; .96)

4.3

Lateral retinacular length (tight, normal)

83% tight

Kappa

.71 (93%)

(.57; .86)

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Q-angle (degrees)

12.2 (4.3)

ICC (2, 1)

.70

(.46; .85)

2.4

Tibial torsion (degrees)

17.6 (5.4)

ICC (2, 1)

.70

(.45; .85)

2.9

Quadriceps length (degrees)

138.5 (12.3)

ICC (2, 2)

.91

(.80; .96)

3.8

Femoral anteversion (degrees)

12.8 (6.1)

ICC (2, 1)

.45

(.10; .70)

4.5

Gastrocnemius length (degrees)

9.3 (5.8)

ICC (2, 2)

.92

(.83; .96)

1.6

Soleus length (degrees)

16.0 (6.0)

ICC (2, 2)

.86

(.71; .94)

2.2

Hip external rotation strength (Kg)

17.1 (5.2)

ICC (2, 2)

.79

(.56; .91)

2.4

Hip abduction strength (Kg)

12.9 (4.6)

ICC (2,2)

.85

(.68; .93)

1.8

ITB/TFL complex length (degrees)

15.5 (11.1)

ICC (2, 2)

.97

(.93; .98)

2.1

Foot pronation (mm)

5.9 (2.7)

ICC (2, 1)

.93

(.84; .97)

0.7

Quality of movement (from 0 to 1 = good; from 2 to 3 = medium; 4 and above = poor)

33% good

50% medium

17% poor

Kappa

.67 (80%)

(.58; .76)

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