A nearly continuous measure of birth weight for gestational age using a United States national reference

BMC Pediatrics

Table 10 Birth weight percentiles from 6 – 23 for all births, and for boys and girls only, at 36 and 37 completed weeks of gestation. In the right half of the table we provide the z-values corresponding to the median of each percentile range. Data in these tables, provided for illustrative purposes, are a subset of data in Tables 1, 2, 3, and 4, published in the electronic pages of this Journal (see additional file 1, Tables 1-8.xls).

Gestational age in completed weeks
	All Births		Boys Only		Girls Only
Percentile	36 weeks	37 weeks	36 weeks	37 weeks	36 weeks	37 weeks	Percentile range	Median of percentile range	z-value corresponding to median of percentile range
6	2213	2429	2266	2486	2168	2375	>5 to 6	5.5	-1.598
7	2259	2465	2311	2523	2206	2409	>6 to 7	6.5	-1.514
8	2296	2496	2349	2552	2240	2439	>7 to 8	7.5	-1.440
9	2325	2524	2381	2580	2270	2467	>8 to 9	8.5	-1.372
10	2354	2552	2410	2609	2299	2495	>9 to 10	9.5	-1.311
11	2382	2580	2439	2637	2327	2524	>10 to 11	10.5	-1.254
12	2409	2609	2465	2666	2354	2551	>11 to 12	11.5	-1.200
13	2432	2634	2487	2692	2380	2574	>12 to 13	12.5	-1.150
14	2451	2654	2505	2713	2400	2593	>13 to 14	13.5	-1.103
15	2471	2672	2526	2731	2419	2611	>14 to 15	14.5	-1.058
16	2494	2692	2549	2751	2439	2631	>15 to 16	15.5	-1.015
17	2514	2711	2569	2770	2458	2649	>16 to 17	16.5	-0.974
18	2532	2728	2586	2786	2475	2667	>17 to 18	17.5	-0.935
19	2551	2743	2603	2800	2494	2685	>18 to 19	18.5	-0.896
20	2570	2758	2619	2816	2512	2700	>19 to 20	19.5	-0.860
21	2586	2773	2637	2832	2168	2375	>20 to 21	20.5	-0.824
22	2601	2789	2654	2847	2206	2409	>21 to 22	21.5	-0.789
23	2616	2804	2670	2863	2240	2439	>22 to 23	22.5	-0.755

ISSN: 1471-2431