Table 1.
Year 1 (2009–2010)a | Year 2 (2010–2011) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
SLV-I schools | Control schools | Difference between SLV-I and Controlb | SLV-I schools | Control schools | Difference between SLV-I and Controlb | |||||
Students | % Total Students | Students | % Total Students | Students | % Total Students | Students | % Total Students | |||
TOTAL STUDENTS | 9,027 | 100 % | 4,534 | 100 % | 0 % | 9,145 | 100 % | 4,796 | 100 % | 0 % |
Not vaccinated | 5,356 | 59.3 % | 3,195 | 70.5 % | −11.2 % | 6,486 | 59.6 % | 3,432 | 71.6 % | −12.0 % |
Total vaccinated | 3,671 | 40.7 %* | 1,339 | 29.5 %* | 11.2 %d*** | 3,698 | 40.4 %** | 1,364 | 28.4 %** | 12.0 %d*** |
Vaccinated elsewherec | 2,474 | 27.4 % | 1,339 | 29.5 % | −2.1 % | 2,659 | 29.1 % | 1,364 | 28.4 % | 0.6 % |
Vaccinated at SLV-I | 1,197 | 13.3 %c | n/a | n/a | 13.3 % | 1,039 | 11.4 % | n/a | n/a | 11.4 % |
n/a: not applicable
a: Only first clinics at each SLV-I school (excluding the vaccinated children at the second vaccination clinics (2.0 % among all students in Year 1))
b: The differences in the proportion between the column of “SLV-I schools (% Total Students)” and “Control schools (% Total Students)”
c: Identified as receiving at least the 1st dose outside the SLV-I schools in the New York State Immunization Information System (NYSIIS)
d: Primary effectiveness measure included in our cost-effectiveness analysis model
*: 40.7 % was significantly greater than 29.5 % (p-value < 0.0001) in Year 1
**: 40.4 % was significantly greater than 28.4 % (p-value < 0.0001) in Year 2
***: Primary effectiveness: 11.2 % in Year 1 was marginally smaller than 12.0 % in Year 2 (p-value = 0.092)