Table 3. Data elements that were missing among suspected cases of measles and rubella in Ontario, 2009–12.

Data elements	Suspected cases (N=497)
	Number	Proportion (%)
Name	0	0.0
Place of residence	0	0.0
Sex	4	0.8
Age	3	0.6
Date of reporting	0	0.0
Date of investigation	153	30.8
Date of rash onset	231	46.5
Date of specimen collection	269	54.1
Fever	249	50.1
Date of prior measles-rubella vaccine1	125/280	44.6
Travel history	384	77.3

¹ Note: Percentages were calculated as a proportion of suspected cases when it was known that at least one dose of measles- or rubella-containing vaccine had been received.