Table I.

Achondroplasia: Prevalence per 10,000 Births Across Seven U.S. Monitoring Programs

Program	Type	Years	Cases	Births	Rate	95% CI
Atlanta	A	68–01	44	1,129,972	0.39	0.30, 0.48
California	A	83–97	168	3,572,233	0.47	0.42, 0.52
Iowa	A	83–01	30	733,196	0.41	0.30, 0.52
New York	A/P	92–01	96	2,664,131	0.36	0.30, 0.43
Arkansas	A	93–99	13	250,000	0.52	0.32, 0.72
Oklahoma	A	94–03	29	484,013	0.60	0.46, 0.74
Texas	A	96–02	79	2,042,554	0.39	0.30, 0.47

A, active; P, passive; CI, confidence interval. Chi square test for homogeneity, P value = 0.19.