Associations of current and childhood socioeconomic status and health outcomes amongst patients with knee or hip osteoarthritis in a Mexico City family-practice setting.

Correlations between outcome variables There was a highly significant and strong correlation between the WOMAC, AMICAL and HAQ-DI scores, with pairwise Pearson correlation coefficients > 0.7 (p < 0.001) for the three possible pairs of scores (Fig. 2 ).

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Linear regression models demonstrated that all three current SES measures (Current Income, Education Level and Occupation type) were associated with all three outcome scores (WOMAC, AMICAL and HAQ-DI) independently of age, sex, BMI, and presence of diabetes or hypertension, except for Occupation type with WOMAC scores which did not reach statistical significance (Fig. 5 ).

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