Trends in gestational age and birth weight in Chile, 1991–2008. A descriptive epidemiological study

Table 1 Values excluded from the Chilean National Database of Live Births, by year

Periods	Total births	GA^a < 22	%	BW^b < 500	%	Errors	%	GA missing	%	GA ≥44	%	BW missing	%
Periods	Total births	GA^a < 22	%	BW^b < 500	%	values	%	GA missing	%	GA ≥44	%	BW missing	%
1991-1995	1 379 194	124	0.01	211	0.02	29 205	2.12	5 471	0.40	164	0.01	4441	0.32
1996-2000	1 281 424	99	0.01	198	0.02	25 104	1.96	2 799	0.22	111	0.01	2006	0.16
2001-2008	1 899 299	525	0.03	960	0.05	24 720	1.3	2 482	0.13	544	0.03	2310	0.12
Total	4 559 917	748	0.02	1369	0.03	79 029	1.73	10 752	0.23	819	0.02	8757	0.19

ISSN: 1471-2393