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Z-scores on Short Form-36 (upper panel) and Psychological General Well-being questionnaires in relation to obesity class (Class I (BMI, 30-34.9 kg/m2), open circles; Class II (BMI, 35-39.9), closed circles; Class III (BMI, ≥40), open squares). Data are presented as means and 95% confidence intervals. Legend: for abbreviations, see Figure 1
