Impact of methodological

Table 2 Estimated vaccination coverage* based on source of information^†. Commonwealth of the Northern Mariana Islands, 2005.

	Vaccination Card		Health Department Record Abstraction		Vaccination Registry		All Sources Combined
	%	95% CI	%	95% CI	%	95% CI	%	95% CI
1 year	37.5	31.2, 43.8	59.8	53.5, 66.1	84.6	80.5, 88.7	91.8	88.3, 95.3
2 years	32.0	25.3, 38.7	34.3	28.0, 40.6	69.6	63.3, 75.9	82.4	77.3, 87.5
6 years	21.6	15.9, 27.3	49.1	42.2, 56.0	47.7	40.8, 54.6	83.0	77.9, 88.1

*Children aged 1 year: received at least 3 doses of diphtheria-pertussis-tetanus vaccine (DPT), 3 doses of inactivated poliovirus vaccine (IPV), 2 doses of Haemophilus influenzae type b vaccine (Hib) and 3 doses of hepatitis B vaccine. Children aged 2 years: received at least 4 doses of DPT, 3 doses of IPV, 1 dose of measles-mumps-rubella vaccine (MMR), 3 doses of Hib, and 3 doses of hepatitis B. Children aged 6 years: received at least 5 doses DPT, 4 doses of IPV, 2 doses of MMR, and 3 doses of hepatitis B vaccine.
^†Children without information are considered not vaccinated.

ISSN: 1471-2458