Major congenital malformations and residential proximity to a regional industrial park including a national toxic waste site: An ecological study

Table 4 ARD rates by locality type and distance from the IP in the Bedouin population (1999–2000)

Distance from the IP	Number of deliveries	Number of cases	Rate per 1000 deliveries	95% confidence interval
Bedouin traditional tribal settlements
< 20 km	1409	3	2.13*	(-)0.28-4.54
> 20 km	604	10	16.56	6.38-26.73
± 20 km	474	5	10.55**	1.35-19.80
Bedouin permanent localities
< 20 km	1635	4	2.44	0.05-4.84
> 20 km	5159	24	4.65	2.80-6.51