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Table 1 Baseline demographic characteristics of patients with osteoarthritis of the knee, by study group a

From: Effectiveness of intra-articular injections of sodium bicarbonate and calcium gluconate in the treatment of osteoarthritis of the knee: a randomized double-blind clinical trial

Variables Baseline sample Final sample
  SBCG1 SBCG2 Sig.b SBCG1 SBCG2 Sig.b
N 36 37   25 26  
Age, y 55.22 ± 9.75 54.59 ± 8.98 0.775 54.44 ± 9.34 53.81 ± 8.61 0.802
BMI kg/cm2 31.14 ± 4.86 31.98 ± 4.57 0.453 31.66 ± 5.24 32.44 ± 4.62 0.579
Female 88.9 78.4 0.226 92.0 80.8 0.244
Location and grade* of OA  
Left knee: Grade II 19.4 19.4 0.858 24.0 24.0 1.000
Grade III 50.0 55.6   48.0 48.0  
Grade IV 30.6 25.0   28.0 28.0  
Right knee: Grade II 19.4 16.2 0.843 24.0 19.2 0.893
Grade III 50.0 56.8   48.0 53.8  
Grade IV 30.6 27.0   28.0 26.9  
  1. aValues are % or mean ± SD.
  2. bANOVA or Chi Square significance level of group comparisons.
  3. *According to Kellgren-Lawrence classification of OA.