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Figure 2: Correlation between duration of disease (years) and bone mineral density Z Score. R = 0.21, P = 0.28, T = 1.11, Coefficient = 0.15, Intercept: 1.71. Univariate regression analysis was conducted between bone mineral density Zscore and duration of disease, and an inverse relationship was observed although it was not significant (P = 0.28). 
