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Table 1 Shows the base line characteristics between cases and controls

From: A genetic association study between growth differentiation factor 5 (GDF 5) polymorphism and knee osteoarthritis in Thai population

Variables Cases (n = 103) Control (n = 103) p-value
Age (years), mean (SD) 68.46(10.0) 59.25(9.0) < 0.01*
Onset of disease (years), mean (SD) 61.46(9.06) N/A N/A
Female (%) 79(87.25) 93(90.29) 0.7
BMI (kg/m2), mean (SD) 26.66(4.0) 24.57(5.0) < 0.01*
History of labor work (%) 25(27.78) 30(29.13) 0.20
Regular exercise (%) 10(11.11) 13(12.62) 0.15
Kneeling activity (%) 37(41.11) 48(46.60) 0.07
Previous any fracture (%) 9(10.0) 13(12.62) 0.15
Smoking (%) 2(2.22) 4(3.88) 0.10
  1. Note: *statistically significant, SD = standard deviation, N/A = not applicable