Table 2.

Cumulative Tdap vaccination rates at baseline and the end of the Year 1 randomized controlled cluster trial, by city

Year 1 – Randomized Controlled Cluster Trial
Intervention sites				Control sites
Site	Total N	% vaccinated by 5/31/2013	% vaccinated by 5/31/2014	Site	Total N	% vaccinated By 5/31/2013	% vaccinated By 5/31/2014
Pittsburgh
B	529	16.6	21.1	N	2,102	31.5	35.1
C	2,179	42.7	52.2	O	4,324	30.1	37.8
D	3,224	12.2	15.3	R	2,534	33.5	40.2
E	1,392	19.1	22.0	S	1,045	38.5	46.8
F	3,611	59.3	70.8	U	2,612	59.5	65.4
G	417	11.2	14.1	W	224	42.8	57.1
H	306	4.2	5.5	X	1,010	48.1	56.3
J	603	19.5	34.3	Y	3,334	23.4	29.7
K	330	6.7	9.1	--
M	595	31.7	42.2	--
Total	13,186	34.7	42.4*	Total	17,185	36.4	42.8*
Total percentage point difference from baseline to end of Year 1			7.7**				6.4**
Houston
A	4,880	45.7	56.5	P	6,388	40.7	47.9
I	8,527	20.2	24.6	T	5,547	35.0	45.4
L	5,867	41.1	58.5	V	8,969	32.1	38.2
Intervention total	19,274	33.1	43.0*	Control total	20,904	35.5	43.1*
Total percentage point difference from baseline to end of Year 1			9.9†	Total percentage point difference from baseline to end of Year 1			7.6†
All groups	70,549	35.1	42.7*	Total percentage point difference from baseline to Year 1			7.6

^*P<0.001 for difference between Baseline and end of Year 1

^**P<0.001 for difference between Intervention and Control groups in Pittsburgh

^†P<0.001 for difference between Intervention and Control groups in Houston