Table 2.

Relative risk of type 1 diabetes in Finnish children up to 10 years after Haemophilus influenzae type b vaccination

Age (years)	Cohort 3* v cohort 1†			Cohort 2‡v cohort 3*
	Relative risk	P value		Relative risk	P value
0-1.9	1.04	0.194		0.96	0.960
2-4.9	1.00	0.748		1.20	0.291
0-10	1.01	0.228		1.06	0.545

^*Born on even numbered days from 1 October 1985 to 31 August 1987; vaccinated at 24 months of age only. 

^†Born from 1 October 1983 to 31 September 1985. 

^‡Born on odd numbered days from 1 October 1985 to 31 August 1987; vaccinated first at 3 months of age.