Mean (SD) weight Z scores at target ages by dataset
| Mean (SD) weight Z score of children by age, sex and study cohort, Z-score units | ||||||
|---|---|---|---|---|---|---|
| Target age (weeks) | Sex | Widdowson (1959) | CIGS (1984) | GDS (1987) | GMS (1999) | Tampere (2003) |
| 0 | M | 0.03 (1.11) | 0.06 (0.97) | 0.12 (1.01) | 0.18 (1.05) | 0.37 (1.08) |
| F | 0.10 (1.01) | 0.30 (0.89) | 0.08 (1.07) | 0.17 (1.1) | 0.40 (1.1) | |
| 7 | M | −0.40 (1.02) | −0.28 (0.99) | −0.25 (0.95) | −0.16 (0.96) | 0.14 (1.05) |
| F | −0.30 (0.83) | −0.19 (0.83) | −0.30 (0.91) | −0.17 (0.9) | 0.12 (0.95) | |
| 13 | M | −0.33 (1.07) | −0.34 (0.97) | −0.21 (0.98) | −0.16 (0.97) | 0.17 (1.03) |
| F | −0.17 (0.83) | −0.22 (0.86) | −0.29 (0.9) | −0.18 (0.9) | 0.12 (0.91) | |
| 26 | M | 0.28 (0.99) | −0.09 (0.98) | 0.15 (1.01) | 0.30 (0.99) | 0.46 (1.07) |
| F | 0.42 (0.82) | 0.05 (0.87) | 0.05 (0.91) | 0.21 (0.93) | 0.38 (0.93) | |
| 39 | M | 0.62 (1) | 0.05 (0.97) | 0.38 (1.05) | 0.56 (1.01) | 0.56 (1.09) |
| F | 0.67 (0.8) | 0.21 (0.86) | 0.23 (0.93) | 0.43 (0.92) | 0.48 (0.96) | |
| 52 | M | 0.69 (0.97) | 0.16 (0.97) | 0.53 (1.01) | 0.55 (1.06) | 0.60 (1.01) |
| F | 0.76 (0.81) | 0.26 (0.83) | 0.38 (0.89) | 0.51 (0.91) | 0.52 (0.91) | |
| 78 | M | – | 0.20 (0.94) | 0.46 (1) | 0.44 (0.97) | 0.62 (0.96) |
| F | – | 0.23 (0.76) | 0.27 (0.95) | 0.41 (1.01) | 0.56 (0.89) | |
| 104 | M | – | 0.04 (0.96) | 0.38 (1.12) | – | 0.52 (0.96) |
| F | – | 0.18 (0.71) | 0.12 (1.12) | – | 0.53 (0.91) | |
Fit: excellent (≤0.17 SD), poor (>0.67 SD).
CIGS, Cambridge Infant Growth Study; GDS, Growth and Development Study; GMS, Gateshead Millennium Study.