Table 4 Head circumference (cm)-for-age z-score curves at 0, ±1, ±2, and ± 3 SD for Chinese boys and girls from birth to 24 months
From: Growth patterns from birth to 24 months in Chinese children: a birth cohorts study across China
Age (months) | Boys | Girls | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
L | M | S | -3SD | -2SD | -1SD | 0SD | 1SD | 2SD | 3SD | L | M | S | -3SD | -2SD | -1SD | 0SD | 1SD | 2SD | 3SD | |
0 | −7.0263 | 34.3 | 0.0262 | 32.2 | 32.8 | 33.4 | 34.3 | 35.3 | 36.6 | 38.4 | −1.4337 | 34.1 | 0.0300 | 31.3 | 32.1 | 33.1 | 34.1 | 35.1 | 36.3 | 37.5 |
1 | −4.4686 | 37.3 | 0.0280 | 34.8 | 35.5 | 36.4 | 37.3 | 38.5 | 39.8 | 41.5 | −1.2431 | 36.9 | 0.0304 | 33.9 | 34.8 | 35.8 | 36.9 | 38.1 | 39.3 | 40.7 |
2 | −2.7515 | 39.2 | 0.0291 | 36.3 | 37.1 | 38.1 | 39.2 | 40.4 | 41.8 | 43.3 | −1.0791 | 38.6 | 0.0304 | 35.4 | 36.4 | 37.4 | 38.6 | 39.8 | 41.1 | 42.5 |
3 | −1.7763 | 40.6 | 0.0294 | 37.4 | 38.4 | 39.5 | 40.6 | 41.8 | 43.2 | 44.7 | −0.9472 | 40.0 | 0.0303 | 36.6 | 37.7 | 38.8 | 40.0 | 41.2 | 42.5 | 43.9 |
4 | −1.2600 | 41.7 | 0.0295 | 38.3 | 39.4 | 40.5 | 41.7 | 43.0 | 44.3 | 45.8 | −0.8444 | 41.0 | 0.0301 | 37.6 | 38.6 | 39.8 | 41.0 | 42.2 | 43.6 | 45.0 |
5 | −0.9752 | 42.6 | 0.0293 | 39.2 | 40.2 | 41.4 | 42.6 | 43.9 | 45.3 | 46.7 | −0.7629 | 41.8 | 0.0298 | 38.4 | 39.5 | 40.6 | 41.8 | 43.1 | 44.5 | 45.9 |
6 | −0.7968 | 43.4 | 0.0291 | 39.9 | 41.0 | 42.1 | 43.4 | 44.7 | 46.0 | 47.5 | −0.6960 | 42.6 | 0.0295 | 39.1 | 40.2 | 41.4 | 42.6 | 43.9 | 45.2 | 46.7 |
7 | −0.6658 | 44.1 | 0.0289 | 40.5 | 41.6 | 42.8 | 44.1 | 45.4 | 46.7 | 48.2 | −0.6377 | 43.3 | 0.0292 | 39.7 | 40.9 | 42.0 | 43.3 | 44.6 | 45.9 | 47.4 |
8 | −0.5616 | 44.7 | 0.0286 | 41.1 | 42.2 | 43.4 | 44.7 | 46.0 | 47.4 | 48.8 | −0.5863 | 43.9 | 0.0289 | 40.3 | 41.5 | 42.6 | 43.9 | 45.2 | 46.5 | 48.0 |
9 | −0.4796 | 45.2 | 0.0284 | 41.6 | 42.7 | 43.9 | 45.2 | 46.5 | 47.9 | 49.3 | −0.5444 | 44.3 | 0.0286 | 40.8 | 41.9 | 43.1 | 44.3 | 45.6 | 47.0 | 48.4 |
10 | −0.4171 | 45.6 | 0.0282 | 41.9 | 43.1 | 44.3 | 45.6 | 46.9 | 48.2 | 49.7 | −0.5097 | 44.7 | 0.0283 | 41.2 | 42.3 | 43.5 | 44.7 | 46.0 | 47.4 | 48.8 |
11 | −0.3699 | 45.9 | 0.0280 | 42.3 | 43.4 | 44.7 | 45.9 | 47.2 | 48.6 | 50.0 | −0.4793 | 45.1 | 0.0280 | 41.5 | 42.6 | 43.8 | 45.1 | 46.3 | 47.7 | 49.1 |
12 | −0.3349 | 46.2 | 0.0278 | 42.6 | 43.8 | 45.0 | 46.2 | 47.5 | 48.9 | 50.3 | −0.4516 | 45.4 | 0.0278 | 41.8 | 42.9 | 44.1 | 45.4 | 46.6 | 48.0 | 49.4 |
13 | −0.3116 | 46.5 | 0.0277 | 42.9 | 44.1 | 45.3 | 46.5 | 47.8 | 49.2 | 50.6 | −0.4262 | 45.6 | 0.0275 | 42.1 | 43.2 | 44.4 | 45.6 | 46.9 | 48.3 | 49.6 |
14 | −0.3002 | 46.8 | 0.0275 | 43.2 | 44.3 | 45.6 | 46.8 | 48.1 | 49.5 | 50.9 | −0.4029 | 45.9 | 0.0273 | 42.3 | 43.5 | 44.7 | 45.9 | 47.2 | 48.5 | 49.9 |
15 | −0.2977 | 47.1 | 0.0274 | 43.4 | 44.6 | 45.8 | 47.1 | 48.4 | 49.7 | 51.1 | − 0.3819 | 46.1 | 0.0271 | 42.6 | 43.7 | 44.9 | 46.1 | 47.4 | 48.7 | 50.1 |
16 | −0.2997 | 47.3 | 0.0273 | 43.6 | 44.8 | 46.0 | 47.3 | 48.6 | 49.9 | 51.4 | −0.3629 | 46.3 | 0.0269 | 42.8 | 43.9 | 45.1 | 46.3 | 47.6 | 48.9 | 50.3 |
17 | −0.3039 | 47.4 | 0.0272 | 43.8 | 45.0 | 46.2 | 47.4 | 48.8 | 50.1 | 51.5 | −0.3456 | 46.5 | 0.0267 | 43.0 | 44.1 | 45.3 | 46.5 | 47.8 | 49.1 | 50.5 |
18 | −0.3091 | 47.6 | 0.0271 | 43.9 | 45.1 | 46.3 | 47.6 | 48.9 | 50.3 | 51.7 | −0.3293 | 46.7 | 0.0265 | 43.2 | 44.3 | 45.5 | 46.7 | 48.0 | 49.3 | 50.6 |
19 | −0.3155 | 47.8 | 0.0270 | 44.1 | 45.3 | 46.5 | 47.8 | 49.1 | 50.4 | 51.9 | −0.3135 | 46.9 | 0.0263 | 43.4 | 44.5 | 45.7 | 46.9 | 48.1 | 49.4 | 50.8 |
20 | − 0.3232 | 47.9 | 0.0269 | 44.3 | 45.5 | 46.7 | 47.9 | 49.3 | 50.6 | 52.0 | −0.2976 | 47.1 | 0.0261 | 43.6 | 44.7 | 45.9 | 47.1 | 48.3 | 49.6 | 50.9 |
21 | −0.3320 | 48.1 | 0.0268 | 44.5 | 45.6 | 46.9 | 48.1 | 49.4 | 50.8 | 52.2 | −0.2811 | 47.2 | 0.0260 | 43.7 | 44.9 | 46.0 | 47.2 | 48.5 | 49.8 | 51.1 |
22 | −0.3414 | 48.3 | 0.0267 | 44.6 | 45.8 | 47.0 | 48.3 | 49.6 | 51.0 | 52.4 | −0.2641 | 47.4 | 0.0258 | 43.9 | 45.1 | 46.2 | 47.4 | 48.7 | 50.0 | 51.3 |
23 | −0.3506 | 48.5 | 0.0266 | 44.8 | 46.0 | 47.2 | 48.5 | 49.8 | 51.1 | 52.6 | −0.2473 | 47.6 | 0.0256 | 44.1 | 45.3 | 46.4 | 47.6 | 48.9 | 50.1 | 51.5 |
24 | −0.3592 | 48.6 | 0.0265 | 45.0 | 46.1 | 47.4 | 48.6 | 49.9 | 51.3 | 52.7 | −0.2313 | 47.8 | 0.0254 | 44.3 | 45.4 | 46.6 | 47.8 | 49.0 | 50.3 | 51.6 |