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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Skeletal Radiol. 2016 Feb 27;45(5):653–660. doi: 10.1007/s00256-016-2343-5

Table 2.

Baseline demographics are displayed for control and case subjects.

Case (n = 60) Control (n = 60) P-value
Gender (male) 25 (41.7%) 25 (41.7% *
Knee side (right) 34 (56.7%) 34 (56.7%) *
WOMAC pain score at baseline 0±0 0±0 *
WOMAC pain score at 48 months 6.4 ± 1.4 0±0 *
Age (mean ± SD) (years) 59.0 ± 6.8 59.2 ± 7.1 0.91
BM (kg/m2) 29.4 ± 4.8 28.6 ± 4.1 0.31
History of knee injury 29 (48.3%) 24 (44.4%) 0.68
History of knee surgery 11 (18.3%) 9 (16.7%) 0.82
Family history of knee replacement surgery 8 (13.3%) 5 (9.3%) 0.49
PASEa score at baseline 177.34 ± 87.76 175.34 ± 79.82 0.89
Change in PASE score (48 months – baseline) −18.52 ± 81.98 −8.98 ± 94.11 0.56
Kellgren-Lawrence grade ≥2 at baseline 20 (33.3%) 15 (25.0%) 0.32
Kellgren-Lawrence grade ≥2 at 48 months 27 (45.0%) 26 (43.3%) 0.85
a

PASE physical activity scale for the elderly

Data are presented as mean ± SD or number of subjects (n), (proportion to total in percentage).

P-values of intergroup differences were assessed using independent t-tests and Chi-square tests, for numerical and categorical variables, respectively.

*

signifies that these variables were included as part of the study design