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Associations between age- and sex-specific Z scores for percentage body fat (%BF) and anthropometric measures-LOWESS smoothing procedure. BMI, body mass index; TSF, triceps skinfold thickness; WC, waist circumference; WHtR, waist-to-height ratio. Age- and sex-specific Z scores were estimated using the LMS curve-fitting procedure based on the NHANES 2001–2004 population.
