Table 2.

Frequency and importance of delayed immunizations of children 2–24 months followed by primary-care pediatricians.

	Potentially dangerous delayed immunization*			Potentially dangerous delays (days)
Vaccination dose	n/N vaccinated	%	95%CI	Means	Median	Min	Max
2 m DTaP-IPV-Hib ± VHB	65/441	14.7%	11.7–18.4	30	14	1	347
4 m DTaP-IPV-Hib ± VHB	98/386	25.4%	21.3–30.0	29	16	1	413
11m DTaP-IPV-Hib ± VHB	58/209	27.8%	22.1–34.2	98	91	8	350
2 m PCV	81/440	18.4%	15.1–22.3	44	16	1	537
4 m PCV	105/384	27.3%	23.1–32.0	40	20	1	477
11 m PCV	27/209	12.9%	9.0–18.1	83	62	6	350
12 m MMR**	54/172	31.4%	24.9–38.7	42	24	1	216
12 m MenC	97/170	57.1%	50.0–64.3	90	60	1	350

DTaP-IPV-Hib ± VHB: diphtheria-tetanus-acellular pertussis-inactivated polio vaccine-Haemophilus influenzae b ± hepatitis B vaccine; PCV: pneumococcal conjugate vaccine; MMR: Measles-Mumps-Rubella vaccine; MenC: meningococcal C vaccine.

^*As defined in Table 1.

^**The potential damaging delay of the second dose of MMR could not be estimated because only children less than 2 years of age have been included.