New birth weight reference standards customised to birth order and sex of babies from South India

Table 1 Smoothed percentiles for birth weight (grams) of first born male and female babies

First born male babies smoothed percentiles											First born female babies smoothed percentiles
GA	N	C3	C10	C25	C50	C75	C90	C97	Mean	SD	N	C3	C10	C25	C50	C75	C90	C97	Mean	SD
31	8	590	871	1131	1394	1637	1842	2035	1427	261	6	601	773	953	1159	1369	1562	1755	1146	310
32	13	744	1055	1340	1630	1899	2126	2340	1513	496	8	774	976	1187	1426	1670	1894	2119	1400	395
33	13	939	1262	1558	1861	2142	2381	2606	1820	529	10	961	1186	1421	1687	1958	2207	2456	1733	397
34	23	1164	1482	1777	2079	2362	2604	2833	2112	358	11	1157	1399	1649	1934	2223	2488	2754	2076	422
35	33	1379	1691	1981	2282	2566	2809	3039	2300	450	16	1366	1616	1874	2166	2464	2735	3007	1941	417
36	53	1591	1892	2176	2472	2752	2993	3222	2353	486	43	1598	1847	2104	2393	2688	2957	3225	2410	433
37	124	1806	2092	2365	2652	2925	3160	3385	2687	384	81	1821	2063	2311	2591	2875	3134	3392	2637	424
38	196	1982	2259	2524	2804	3072	3304	3525	2774	429	184	2004	2236	2474	2741	3012	3259	3505	2742	397
39	269	2152	2417	2673	2944	3204	3429	3645	2912	388	265	2142	2370	2604	2866	3132	3374	3615	2856	384
40	308	2287	2547	2798	3065	3321	3544	3758	3083	391	321	2250	2479	2714	2977	3244	3487	3729	2994	404
41	82	2366	2614	2855	3112	3359	3575	3781	3078	383	91	2353	2570	2792	3042	3294	3523	3751	3038	365
42	7	2419	2652	2877	3119	3352	3555	3751	2887	245	11	2448	2647	2851	3079	3310	3520	3728	3005	322

GA = Gestational Age (weeks), N = Number of babies in each group, C3 – C97 = Predicted Smoothed percentiles from GAMLSS model Mean & SD = Arithmetic Mean and standard deviation in each group.

ISSN: 1471-2393