Fig. 2From: Reproducibility and relative validity of a semi-quantitative food frequency questionnaire for Chinese pregnant womenBland–Altman plot showing agreement between the average of food frequency questionnaires (FFQs) and the three 24-h recalls (24HRs) in estimating the intakes of (a) energy, (b) calcium, (c) vegetables and (d) milk & milk products. (SD - standard deviation)Back to article page