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Table 1 Outline of the randomisation strata

From: The effect of glucosamine sulphate on osteoarthritis: design of a long-term randomised clinical trial [ISRCTN54513166]

  Hip radiograph Knee and hand radiographs Type
Group 1 K-L score < 2 K-L score < 2 for hands and knees mild + localised
Group 2 K-L score < 2 K-L score ≥ 2 for hands and/or knees mild + generalised
Group 3 K-L score ≥ 2 K-L score < 2 for hands and knees moderate/severe + localised
Group 4 K-L score ≥ 2 K-L score ≥ 2 for hands and/or knees moderate/severe + generalised