Contents Executive summary xvii 1.Introduction 1 2.Methodology 2.1 Design of the WHO Multicentre Growth Reference Study 3 2.2 Anthropometry methods 2.3 Sample description 2.4 Data cleaning procedures and exclusions 2.5 Statistical methods for constructing the growth curves 7 3.Construction of the length/height-for-age standards 13 3.1 Indicator-specific methodology 13 3.2 Length/height-for-age for boys 13 3.2.1 Sample size 13 3.2.2 Model selection and results 3.2.3 WHO standards and their comparison with NCHS and CDC 2000 references 3 Charts 33 Tables 37 Comparison with NCHS 45 Comparison with CDC 2000 4 3.3 Length/height-for-age for girls 3.3.1 Sample size 47 3.3.2 Model selection and results 47 3.3.3 WHO standards and their comparison with NCHS and CDC 2000 references 59 Charts 60 Tables 64 Comparison with NCHS 7 Comparison with CDC 2000 3.4 Comparisons between boys and girls 4 3.4.1WHO 7 3.4.2 NCHS 7 3.4.3CDC2000 7 4.Construction of the weight-for-age standards 79 4.1 Indicator-specific methodology 4.2 Weight-for-age for boys 79 4.2.1 Sample size 4.2.2 Model selection and results 79 4.2.3 WHO standards and their comparison with NCHS and CDC 2000 references 94 Charts 95 Tables 97 Comparison with NCHS 105 Comparison with CDC 2000 106 4.3 Weight-for-age for girls 107 4.3.1 Sample size 107 4.3.2 Model selection and results 107 4.3.3 WHO standards and their comparison with NCHS and CDC 2000 references 122 Charts 123 Tables 125 Comparison with NCHS 133 Comparison with CDC 2000 134 4.4 Comparisons between boys and girls 135 4.4.1WHO 136 4.4.2 NCHS 137 -V-- v - Contents Executive summary xvii 1. Introduction 1 2. Methodology 3 2.1 Design of the WHO Multicentre Growth Reference Study 3 2.2 Anthropometry methods 3 2.3 Sample description 4 2.4 Data cleaning procedures and exclusions 5 2.5 Statistical methods for constructing the growth curves 7 3. Construction of the length/height-for-age standards 13 3.1 Indicator-specific methodology 13 3.2 Length/height-for-age for boys 13 3.2.1 Sample size 13 3.2.2 Model selection and results 14 3.2.3 WHO standards and their comparison with NCHS and CDC 2000 references 32 Charts 33 Tables 37 Comparison with NCHS 45 Comparison with CDC 2000 46 3.3 Length/height-for-age for girls 47 3.3.1 Sample size 47 3.3.2 Model selection and results 47 3.3.3 WHO standards and their comparison with NCHS and CDC 2000 references 59 Charts 60 Tables 64 Comparison with NCHS 72 Comparison with CDC 2000 73 3.4 Comparisons between boys and girls 74 3.4.1 WHO 75 3.4.2 NCHS 76 3.4.3 CDC 2000 77 4. Construction of the weight-for-age standards 79 4.1 Indicator-specific methodology 79 4.2 Weight-for-age for boys 79 4.2.1 Sample size 79 4.2.2 Model selection and results 79 4.2.3 WHO standards and their comparison with NCHS and CDC 2000 references 94 Charts 95 Tables 97 Comparison with NCHS 105 Comparison with CDC 2000 106 4.3 Weight-for-age for girls 107 4.3.1 Sample size 107 4.3.2 Model selection and results 107 4.3.3 WHO standards and their comparison with NCHS and CDC 2000 references 122 Charts 123 Tables 125 Comparison with NCHS 133 Comparison with CDC 2000 134 4.4 Comparisons between boys and girls 135 4.4.1 WHO 136 4.4.2 NCHS 137